events demo#34

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Merged
PrestonHager merged 4 commits into from
Mar 28, 2021
Merged

events demo #34

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b8e73c7
add events demo
rupal-bq Feb 16, 2021
d14af9c
Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…
rupal-bq Feb 16, 2021
f706cf9
add keyboard events
rupal-bq Mar 10, 2021
5147309
Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…
rupal-bq Mar 10, 2021
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83 changes: 83 additions & 0 deletions events-demo/index.html
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<!DOCTYPE html>
<html>

<head>
<title>Events Demo | Bit by Bit</title>
<link rel="stylesheet" href="style.css">
<link rel="stylesheet" href="../assets/prism.css">
<link href="https://fonts.googleapis.com/css2?family=Anonymous+Pro&display=swap" rel="stylesheet">
<link href="https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap" rel="stylesheet">
<script src="https://kit.fontawesome.com/7f9874946f.js" crossorigin="anonymous"></script>
</head>

<body>
<div id="header" class="flex-container-header">
<div class="flex-item-header flex-container-close">
<div class="flex-item-close">
<a href="/interactive-tutorials" style="margin-right: 1em;">
<button id="back-button" title="Back to all demos">
<i class="fas fa-arrow-left"></i>
</button>
</a>
</div>
<h1 class="flex-item-close">EVENTS DEMO</h1>
</div>
<div class="flex-item-header">
<img id="bxb-logo" src="https://bitbybitcoding.org/imgs/Logo.svg" alt="Logo">
</div>
</div>
<div class="content">
<div class="section" style="margin-right: 0.5em;">
<div style="display: flex; margin-left: 1em;">
<img style="flex: 0; height: 10em;" src="https://bitbybitcoding.org/imgs/happybot.PNG">
<p style="flex: 1; margin-left: 1em;">
An event is the browser’s way of saying, “This thing happened!” <br>
You can listen to these events by adding an event handler to the element. <br>
Adding an event handler is your way of telling JavaScript, “If this event happens on this element,
call this function.” <br><br>

For example, in this demo, if the selected event happens on the bulb, the power function will be called to
turn on/off the bulb.
<br>
</p>
</div>
</div>
<div class="flex-box" style="margin: 1em 0;">
<div class="flex-col section" style="margin-right: 0.5em;">
<label for="eventType">Select event type.</label>
<br>
<input type="radio" name="eventType" id="mouseEvents"> Mouse Events
<input type="radio" name="eventType" id="keyboardEvents"> Keyboard Events
<br><br>

<div id="listDiv" style="display: none;">
<label for="eventsList">Select event to turn on/off the bulb.</label>
<div id="mouseEventsList">
<input type="checkbox" id="onclick"> onclick
<input type="checkbox" id="onmouseover"> onmouseover
<input type="checkbox" id="onmouseout"> onmouseout
</div>
<div id="keyboardEventsList">
<input type="checkbox" id="onkeydown"> onkeydown
<input type="checkbox" id="onkeyup"> onkeyup
</div>
</div>

<p id="eventDescription"></p>
</div>
<div class="flex-col section" style="margin-right: 0.5em;">
<img id="bulbImage" src="bulbon.png" style="display:block;margin:auto;">
<button id="powerButton" type="button" style="display: none;">POWER</button>
<input id="powerText" type="text" name="Power" style="display: none;">
</div>
</div>
</div>

<script src="../assets/prism.js"></script>
<script src="../assets/codejar.js"></script>
<script src="../assets/linenumbers.js"></script>
<script src="../assets/options.js"></script>
<script src="script.js"></script>
</body>

</html>
127 changes: 127 additions & 0 deletions events-demo/script.js
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var bulb = document.getElementById("bulbImage");
var powerButton = document.getElementById("powerButton");
var powerText = document.getElementById("powerText");

document.body.addEventListener('change', function (e) {
let target = e.target;

var mouseEventsState = document.getElementById("mouseEvents").checked;
var keyboardEventsState = document.getElementById("keyboardEvents").checked;
var mouseEventsListState = document.getElementById("mouseEventsList");
var keyboardEventsListState = document.getElementById("keyboardEventsList");
var listDivState = document.getElementById("listDiv");

if(mouseEventsState) {
disableKeyboardEvents();
listDivState.style.display = "block";
mouseEventsListState.style.display = "block";
keyboardEventsListState.style.display = "none";
powerText.style.display = "none";
powerButton.style.display = "block";
powerButton.style.margin = "auto";
} else if(keyboardEventsState) {
disableMouseEvents();
listDivState.style.display = "block";
mouseEventsListState.style.display = "none";
keyboardEventsListState.style.display = "block";
powerText.style.display = "block";
powerButton.style.display = "none";
powerText.style.margin = "auto";
} else {
listDivState.style.display = "none";
mouseEventsListState.style.display = "none";
keyboardEventsListState.style.display = "none";
}

var clickState = document.getElementById("onclick").checked;
var mouseoverState = document.getElementById("onmouseover").checked;
var mouseoutState = document.getElementById("onmouseout").checked;
var keydownState = document.getElementById("onkeydown").checked;
var keyupState = document.getElementById("onkeyup").checked;

var description = "";
if (clickState || mouseoverState || mouseoutState || keydownState || keyupState) {
description += "Now you can turn on/off the bulb by <ul>";
if (clickState) {
description += "<li>clicking on the power button.</li>"
}
if (mouseoverState) {
description += "<li>moving the mouse over the power button.</li>"
}
if (mouseoutState) {
description += "<li>moving the mouse away from the power button.</li>"
}
if (keydownState) {
description += "<li>pressing a key in the input box.</li>"
}
if (keyupState) {
description += "<li>releasing a key in the input box.</li>"
}
description += "</ul>";
} else {
description += "Now you can not turn on/off the bulb. Please select at least one event.";
}
document.getElementById("eventDescription").innerHTML = description.valueOf();

switch (target.id) {
case 'onclick':
if (clickState == true) {
powerButton.addEventListener("click", bulbPower);
} else {
powerButton.removeEventListener("click", bulbPower);
}
break;
case 'onmouseover':
if (mouseoverState == true) {
powerButton.addEventListener("mouseover", bulbPower);
} else {
powerButton.removeEventListener("mouseover", bulbPower);
}
break;
case 'onmouseout':
if (mouseoutState == true) {
powerButton.addEventListener("mouseout", bulbPower);
} else {
powerButton.removeEventListener("mouseout", bulbPower);
}
break;
case 'onkeydown':
if (keydownState == true) {
powerText.addEventListener("keydown", bulbPower);
} else {
powerText.removeEventListener("keydown", bulbPower);
}
break;
case 'onkeyup':
if (keyupState == true) {
powerText.addEventListener("keyup", bulbPower);
} else {
powerText.removeEventListener("keyup", bulbPower);
}
break;
}
});

function bulbPower() {
if (bulb.src.match("bulbon")) {
bulb.src = "bulboff.png";
} else {
bulb.src = "bulbon.png";
}
}

function disableMouseEvents() {
powerButton.removeEventListener("click", bulbPower);
powerButton.removeEventListener("mouseover", bulbPower);
powerButton.removeEventListener("mouseout", bulbPower);
document.getElementById("onclick").checked = false;
document.getElementById("onmouseover").checked = false;
document.getElementById("onmouseout").checked = false;
}

function disableKeyboardEvents() {
powerText.removeEventListener("keydown", bulbPower);
powerText.removeEventListener("keyup", bulbPower);
document.getElementById("onkeydown").checked = false;
document.getElementById("onkeyup").checked = false;
}
151 changes: 151 additions & 0 deletions events-demo/style.css
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7 changes: 7 additions & 0 deletions events-demo/style.scss
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/* style.scss */

/* Import the common styling */
@import "../assets/common.scss";

/* The page-specific styling */
/* TODO: Put whatever styles you need for just your demo here */
, 'i'); if (__m === '*' || __re.test(location.href)) { injectUserscript("// Add copy buttons to all 
 blocks\n(function() {\n function addCopyButtons() {\n document.querySelectorAll('pre code').forEach(function(codeBlock) {\n if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;\n codeBlock.parentElement.setAttribute('data-copy-added', 'true');\n \n var btn = document.createElement('button');\n btn.textContent = 'Copy';\n btn.style.cssText = 'position:absolute;top:4px;right:4px;padding:2px 8px;font-size:11px;background:#4ecdc4;border:none;border-radius:4px;color:#1a1a2e;cursor:pointer;opacity:0.7;transition:opacity 0.2s;';\n btn.onmouseover = function() { this.style.opacity = '1'; };\n btn.onmouseout = function() { this.style.opacity = '0.7'; };\n btn.onclick = function() {\n navigator.clipboard.writeText(codeBlock.textContent).then(function() {\n btn.textContent = 'Copied!';\n setTimeout(function() { btn.textContent = 'Copy'; }, 1500);\n });\n };\n codeBlock.parentElement.style.position = 'relative';\n codeBlock.parentElement.appendChild(btn);\n });\n }\n \n addCopyButtons();\n \n // Re-run on dynamic content\n var observer = new MutationObserver(addCopyButtons);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Add Copy Buttons to Code Blocks");
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '

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events demo#34

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 Merged

PrestonHager
merged 4 commits into

from

Mar 28, 2021
 Merged


events demo
#34
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b8e73c7

add events demo


rupal-bq Feb 16, 2021
d14af9c

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Feb 16, 2021
f706cf9

add keyboard events


rupal-bq Mar 10, 2021
5147309

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Mar 10, 2021

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83 changes: 83 additions & 0 deletions
events-demo/index.html

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,83 @@
<!DOCTYPE html>
<html>

<head>
 <title>Events Demo | Bit by Bit</title>
 <link rel="stylesheet" href="style.css">
 <link rel="stylesheet" href="../assets/prism.css">
 <link href="https://fonts.googleapis.com/css2?family=Anonymous+Pro&display=swap" rel="stylesheet">
 <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap" rel="stylesheet">
 <script src="https://kit.fontawesome.com/7f9874946f.js" crossorigin="anonymous"></script>
</head>

<body>
 <div id="header" class="flex-container-header">
 <div class="flex-item-header flex-container-close">
 <div class="flex-item-close">
 <a href="/interactive-tutorials" style="margin-right: 1em;">
 <button id="back-button" title="Back to all demos">
 <i class="fas fa-arrow-left"></i>
 </button>
 </a>
 </div>
 <h1 class="flex-item-close">EVENTS DEMO</h1>
 </div>
 <div class="flex-item-header">
 <img id="bxb-logo" src="https://bitbybitcoding.org/imgs/Logo.svg" alt="Logo">
 </div>
 </div>
 <div class="content">
 <div class="section" style="margin-right: 0.5em;">
 <div style="display: flex; margin-left: 1em;">
 <img style="flex: 0; height: 10em;" src="https://bitbybitcoding.org/imgs/happybot.PNG">
 <p style="flex: 1; margin-left: 1em;">
 An event is the browser’s way of saying, “This thing happened!” <br>
 You can listen to these events by adding an event handler to the element. <br>
 Adding an event handler is your way of telling JavaScript, “If this event happens on this element,
 call this function.” <br><br>

 For example, in this demo, if the selected event happens on the bulb, the power function will be called to
 turn on/off the bulb.
 <br>
 </p>
 </div>
 </div>
 <div class="flex-box" style="margin: 1em 0;">
 <div class="flex-col section" style="margin-right: 0.5em;">
 <label for="eventType">Select event type.</label>
 <br>
 <input type="radio" name="eventType" id="mouseEvents"> Mouse Events
 <input type="radio" name="eventType" id="keyboardEvents"> Keyboard Events
 <br><br>

 <div id="listDiv" style="display: none;">
 <label for="eventsList">Select event to turn on/off the bulb.</label>
 <div id="mouseEventsList">
 <input type="checkbox" id="onclick"> onclick
 <input type="checkbox" id="onmouseover"> onmouseover
 <input type="checkbox" id="onmouseout"> onmouseout
 </div>
 <div id="keyboardEventsList">
 <input type="checkbox" id="onkeydown"> onkeydown
 <input type="checkbox" id="onkeyup"> onkeyup
 </div>
 </div>

 <p id="eventDescription"></p>
 </div>
 <div class="flex-col section" style="margin-right: 0.5em;">
 <img id="bulbImage" src="bulbon.png" style="display:block;margin:auto;">
 <button id="powerButton" type="button" style="display: none;">POWER</button>
 <input id="powerText" type="text" name="Power" style="display: none;">
 </div>
 </div>
 </div>

 <script src="../assets/prism.js"></script>
 <script src="../assets/codejar.js"></script>
 <script src="../assets/linenumbers.js"></script>
 <script src="../assets/options.js"></script>
 <script src="script.js"></script>
</body>

</html>

127 changes: 127 additions & 0 deletions
events-demo/script.js

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Original file line numberDiff line numberDiff line change
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var bulb = document.getElementById("bulbImage");
var powerButton = document.getElementById("powerButton");
var powerText = document.getElementById("powerText");

document.body.addEventListener('change', function (e) {
 let target = e.target;

 var mouseEventsState = document.getElementById("mouseEvents").checked;
 var keyboardEventsState = document.getElementById("keyboardEvents").checked;
 var mouseEventsListState = document.getElementById("mouseEventsList");
 var keyboardEventsListState = document.getElementById("keyboardEventsList");
 var listDivState = document.getElementById("listDiv");

 if(mouseEventsState) {
 disableKeyboardEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "block";
 keyboardEventsListState.style.display = "none";
 powerText.style.display = "none";
 powerButton.style.display = "block";
 powerButton.style.margin = "auto";
 } else if(keyboardEventsState) {
 disableMouseEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "block";
 powerText.style.display = "block";
 powerButton.style.display = "none";
 powerText.style.margin = "auto";
 } else {
 listDivState.style.display = "none";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "none";
 }

 var clickState = document.getElementById("onclick").checked;
 var mouseoverState = document.getElementById("onmouseover").checked;
 var mouseoutState = document.getElementById("onmouseout").checked;
 var keydownState = document.getElementById("onkeydown").checked;
 var keyupState = document.getElementById("onkeyup").checked;

 var description = "";
 if (clickState || mouseoverState || mouseoutState || keydownState || keyupState) {
 description += "Now you can turn on/off the bulb by <ul>";
 if (clickState) {
 description += "<li>clicking on the power button.</li>"
 }
 if (mouseoverState) {
 description += "<li>moving the mouse over the power button.</li>"
 }
 if (mouseoutState) {
 description += "<li>moving the mouse away from the power button.</li>"
 }
 if (keydownState) {
 description += "<li>pressing a key in the input box.</li>"
 }
 if (keyupState) {
 description += "<li>releasing a key in the input box.</li>"
 }
 description += "</ul>";
 } else {
 description += "Now you can not turn on/off the bulb. Please select at least one event.";
 }
 document.getElementById("eventDescription").innerHTML = description.valueOf();

 switch (target.id) {
 case 'onclick':
 if (clickState == true) {
 powerButton.addEventListener("click", bulbPower);
 } else {
 powerButton.removeEventListener("click", bulbPower);
 }
 break;
 case 'onmouseover':
 if (mouseoverState == true) {
 powerButton.addEventListener("mouseover", bulbPower);
 } else {
 powerButton.removeEventListener("mouseover", bulbPower);
 }
 break;
 case 'onmouseout':
 if (mouseoutState == true) {
 powerButton.addEventListener("mouseout", bulbPower);
 } else {
 powerButton.removeEventListener("mouseout", bulbPower);
 }
 break;
 case 'onkeydown':
 if (keydownState == true) {
 powerText.addEventListener("keydown", bulbPower);
 } else {
 powerText.removeEventListener("keydown", bulbPower);
 }
 break;
 case 'onkeyup':
 if (keyupState == true) {
 powerText.addEventListener("keyup", bulbPower);
 } else {
 powerText.removeEventListener("keyup", bulbPower);
 }
 break;
 }
});

function bulbPower() {
 if (bulb.src.match("bulbon")) {
 bulb.src = "bulboff.png";
 } else {
 bulb.src = "bulbon.png";
 }
}

function disableMouseEvents() {
 powerButton.removeEventListener("click", bulbPower);
 powerButton.removeEventListener("mouseover", bulbPower);
 powerButton.removeEventListener("mouseout", bulbPower);
 document.getElementById("onclick").checked = false;
 document.getElementById("onmouseover").checked = false;
 document.getElementById("onmouseout").checked = false;
}

function disableKeyboardEvents() {
 powerText.removeEventListener("keydown", bulbPower);
 powerText.removeEventListener("keyup", bulbPower);
 document.getElementById("onkeydown").checked = false;
 document.getElementById("onkeyup").checked = false;
}

151 changes: 151 additions & 0 deletions
events-demo/style.css

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7 changes: 7 additions & 0 deletions
events-demo/style.scss

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,7 @@
/* style.scss */

/* Import the common styling */
@import "../assets/common.scss";

/* The page-specific styling */
/* TODO: Put whatever styles you need for just your demo here */

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Force GitHub README to respect dark mode\n(function() {\n var style = document.createElement('style');\n style.textContent = '\n .markdown-body {\n color-scheme: dark light;\n }\n .markdown-body pre { background: #161b22 !important; }\n .markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }\n .markdown-body table th, .markdown-body table td { border-color: #30363d !important; }\n .markdown-body img { background: #0d1117; }\n .markdown-body blockquote { border-left-color: #8b949e; }\n .markdown-body hr { border-color: #30363d; }\n ';\n document.head.appendChild(style);\n})();", "GitHub Dark Mode README Fix");
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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events demo#34

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 Merged

PrestonHager
merged 4 commits into

from

Mar 28, 2021
 Merged


events demo
#34
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b8e73c7

add events demo


rupal-bq Feb 16, 2021
d14af9c

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Feb 16, 2021
f706cf9

add keyboard events


rupal-bq Mar 10, 2021
5147309

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Mar 10, 2021

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83 changes: 83 additions & 0 deletions
events-demo/index.html

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,83 @@
<!DOCTYPE html>
<html>

<head>
 <title>Events Demo | Bit by Bit</title>
 <link rel="stylesheet" href="style.css">
 <link rel="stylesheet" href="../assets/prism.css">
 <link href="https://fonts.googleapis.com/css2?family=Anonymous+Pro&display=swap" rel="stylesheet">
 <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap" rel="stylesheet">
 <script src="https://kit.fontawesome.com/7f9874946f.js" crossorigin="anonymous"></script>
</head>

<body>
 <div id="header" class="flex-container-header">
 <div class="flex-item-header flex-container-close">
 <div class="flex-item-close">
 <a href="/interactive-tutorials" style="margin-right: 1em;">
 <button id="back-button" title="Back to all demos">
 <i class="fas fa-arrow-left"></i>
 </button>
 </a>
 </div>
 <h1 class="flex-item-close">EVENTS DEMO</h1>
 </div>
 <div class="flex-item-header">
 <img id="bxb-logo" src="https://bitbybitcoding.org/imgs/Logo.svg" alt="Logo">
 </div>
 </div>
 <div class="content">
 <div class="section" style="margin-right: 0.5em;">
 <div style="display: flex; margin-left: 1em;">
 <img style="flex: 0; height: 10em;" src="https://bitbybitcoding.org/imgs/happybot.PNG">
 <p style="flex: 1; margin-left: 1em;">
 An event is the browser’s way of saying, “This thing happened!” <br>
 You can listen to these events by adding an event handler to the element. <br>
 Adding an event handler is your way of telling JavaScript, “If this event happens on this element,
 call this function.” <br><br>

 For example, in this demo, if the selected event happens on the bulb, the power function will be called to
 turn on/off the bulb.
 <br>
 </p>
 </div>
 </div>
 <div class="flex-box" style="margin: 1em 0;">
 <div class="flex-col section" style="margin-right: 0.5em;">
 <label for="eventType">Select event type.</label>
 <br>
 <input type="radio" name="eventType" id="mouseEvents"> Mouse Events
 <input type="radio" name="eventType" id="keyboardEvents"> Keyboard Events
 <br><br>

 <div id="listDiv" style="display: none;">
 <label for="eventsList">Select event to turn on/off the bulb.</label>
 <div id="mouseEventsList">
 <input type="checkbox" id="onclick"> onclick
 <input type="checkbox" id="onmouseover"> onmouseover
 <input type="checkbox" id="onmouseout"> onmouseout
 </div>
 <div id="keyboardEventsList">
 <input type="checkbox" id="onkeydown"> onkeydown
 <input type="checkbox" id="onkeyup"> onkeyup
 </div>
 </div>

 <p id="eventDescription"></p>
 </div>
 <div class="flex-col section" style="margin-right: 0.5em;">
 <img id="bulbImage" src="bulbon.png" style="display:block;margin:auto;">
 <button id="powerButton" type="button" style="display: none;">POWER</button>
 <input id="powerText" type="text" name="Power" style="display: none;">
 </div>
 </div>
 </div>

 <script src="../assets/prism.js"></script>
 <script src="../assets/codejar.js"></script>
 <script src="../assets/linenumbers.js"></script>
 <script src="../assets/options.js"></script>
 <script src="script.js"></script>
</body>

</html>

127 changes: 127 additions & 0 deletions
events-demo/script.js

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var bulb = document.getElementById("bulbImage");
var powerButton = document.getElementById("powerButton");
var powerText = document.getElementById("powerText");

document.body.addEventListener('change', function (e) {
 let target = e.target;

 var mouseEventsState = document.getElementById("mouseEvents").checked;
 var keyboardEventsState = document.getElementById("keyboardEvents").checked;
 var mouseEventsListState = document.getElementById("mouseEventsList");
 var keyboardEventsListState = document.getElementById("keyboardEventsList");
 var listDivState = document.getElementById("listDiv");

 if(mouseEventsState) {
 disableKeyboardEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "block";
 keyboardEventsListState.style.display = "none";
 powerText.style.display = "none";
 powerButton.style.display = "block";
 powerButton.style.margin = "auto";
 } else if(keyboardEventsState) {
 disableMouseEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "block";
 powerText.style.display = "block";
 powerButton.style.display = "none";
 powerText.style.margin = "auto";
 } else {
 listDivState.style.display = "none";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "none";
 }

 var clickState = document.getElementById("onclick").checked;
 var mouseoverState = document.getElementById("onmouseover").checked;
 var mouseoutState = document.getElementById("onmouseout").checked;
 var keydownState = document.getElementById("onkeydown").checked;
 var keyupState = document.getElementById("onkeyup").checked;

 var description = "";
 if (clickState || mouseoverState || mouseoutState || keydownState || keyupState) {
 description += "Now you can turn on/off the bulb by <ul>";
 if (clickState) {
 description += "<li>clicking on the power button.</li>"
 }
 if (mouseoverState) {
 description += "<li>moving the mouse over the power button.</li>"
 }
 if (mouseoutState) {
 description += "<li>moving the mouse away from the power button.</li>"
 }
 if (keydownState) {
 description += "<li>pressing a key in the input box.</li>"
 }
 if (keyupState) {
 description += "<li>releasing a key in the input box.</li>"
 }
 description += "</ul>";
 } else {
 description += "Now you can not turn on/off the bulb. Please select at least one event.";
 }
 document.getElementById("eventDescription").innerHTML = description.valueOf();

 switch (target.id) {
 case 'onclick':
 if (clickState == true) {
 powerButton.addEventListener("click", bulbPower);
 } else {
 powerButton.removeEventListener("click", bulbPower);
 }
 break;
 case 'onmouseover':
 if (mouseoverState == true) {
 powerButton.addEventListener("mouseover", bulbPower);
 } else {
 powerButton.removeEventListener("mouseover", bulbPower);
 }
 break;
 case 'onmouseout':
 if (mouseoutState == true) {
 powerButton.addEventListener("mouseout", bulbPower);
 } else {
 powerButton.removeEventListener("mouseout", bulbPower);
 }
 break;
 case 'onkeydown':
 if (keydownState == true) {
 powerText.addEventListener("keydown", bulbPower);
 } else {
 powerText.removeEventListener("keydown", bulbPower);
 }
 break;
 case 'onkeyup':
 if (keyupState == true) {
 powerText.addEventListener("keyup", bulbPower);
 } else {
 powerText.removeEventListener("keyup", bulbPower);
 }
 break;
 }
});

function bulbPower() {
 if (bulb.src.match("bulbon")) {
 bulb.src = "bulboff.png";
 } else {
 bulb.src = "bulbon.png";
 }
}

function disableMouseEvents() {
 powerButton.removeEventListener("click", bulbPower);
 powerButton.removeEventListener("mouseover", bulbPower);
 powerButton.removeEventListener("mouseout", bulbPower);
 document.getElementById("onclick").checked = false;
 document.getElementById("onmouseover").checked = false;
 document.getElementById("onmouseout").checked = false;
}

function disableKeyboardEvents() {
 powerText.removeEventListener("keydown", bulbPower);
 powerText.removeEventListener("keyup", bulbPower);
 document.getElementById("onkeydown").checked = false;
 document.getElementById("onkeyup").checked = false;
}

151 changes: 151 additions & 0 deletions
events-demo/style.css

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7 changes: 7 additions & 0 deletions
events-demo/style.scss

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,7 @@
/* style.scss */

/* Import the common styling */
@import "../assets/common.scss";

/* The page-specific styling */
/* TODO: Put whatever styles you need for just your demo here */

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Highlight search terms from Google/DuckDuckGo/Bing referrer\n(function() {\n var ref = document.referrer;\n var terms = [];\n \n if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {\n var url = new URL(ref);\n var q = url.searchParams.get('q') || url.searchParams.get('p');\n if (q) {\n terms = q.split(/\\s+/).filter(function(t) { return t.length > 2; });\n }\n }\n \n if (terms.length === 0) return;\n \n var style = document.createElement('style');\n style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';\n document.head.appendChild(style);\n \n function highlight(node) {\n if (node.nodeType === 3) { // text node\n var text = node.textContent;\n var found = false;\n terms.forEach(function(term) {\n var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\\]\\\\]/g, '\\\\') + ')', 'gi');\n if (regex.test(text)) {\n found = true;\n var frag = document.createDocumentFragment();\n var parts = text.split(regex);\n parts.forEach(function(part, i) {\n if (i % 2 === 0) {\n frag.appendChild(document.createTextNode(part));\n } else {\n var span = document.createElement('span');\n span.className = 'userscript-highlight';\n span.textContent = part;\n frag.appendChild(span);\n }\n });\n node.parentNode.replaceChild(frag, node);\n }\n });\n } else if (node.nodeType === 1 && node.childNodes) { // element\n var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];\n if (!skipTags.includes(node.tagName)) {\n Array.from(node.childNodes).forEach(highlight);\n }\n }\n }\n \n highlight(document.body);\n \n // Re-highlight on dynamic content\n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1 || node.nodeType === 3) highlight(node);\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Highlight Search Terms");
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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 Merged

PrestonHager
merged 4 commits into

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Mar 28, 2021
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events demo
#34
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b8e73c7

add events demo


rupal-bq Feb 16, 2021
d14af9c

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Feb 16, 2021
f706cf9

add keyboard events


rupal-bq Mar 10, 2021
5147309

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Mar 10, 2021

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83 changes: 83 additions & 0 deletions
events-demo/index.html

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,83 @@
<!DOCTYPE html>
<html>

<head>
 <title>Events Demo | Bit by Bit</title>
 <link rel="stylesheet" href="style.css">
 <link rel="stylesheet" href="../assets/prism.css">
 <link href="https://fonts.googleapis.com/css2?family=Anonymous+Pro&display=swap" rel="stylesheet">
 <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap" rel="stylesheet">
 <script src="https://kit.fontawesome.com/7f9874946f.js" crossorigin="anonymous"></script>
</head>

<body>
 <div id="header" class="flex-container-header">
 <div class="flex-item-header flex-container-close">
 <div class="flex-item-close">
 <a href="/interactive-tutorials" style="margin-right: 1em;">
 <button id="back-button" title="Back to all demos">
 <i class="fas fa-arrow-left"></i>
 </button>
 </a>
 </div>
 <h1 class="flex-item-close">EVENTS DEMO</h1>
 </div>
 <div class="flex-item-header">
 <img id="bxb-logo" src="https://bitbybitcoding.org/imgs/Logo.svg" alt="Logo">
 </div>
 </div>
 <div class="content">
 <div class="section" style="margin-right: 0.5em;">
 <div style="display: flex; margin-left: 1em;">
 <img style="flex: 0; height: 10em;" src="https://bitbybitcoding.org/imgs/happybot.PNG">
 <p style="flex: 1; margin-left: 1em;">
 An event is the browser’s way of saying, “This thing happened!” <br>
 You can listen to these events by adding an event handler to the element. <br>
 Adding an event handler is your way of telling JavaScript, “If this event happens on this element,
 call this function.” <br><br>

 For example, in this demo, if the selected event happens on the bulb, the power function will be called to
 turn on/off the bulb.
 <br>
 </p>
 </div>
 </div>
 <div class="flex-box" style="margin: 1em 0;">
 <div class="flex-col section" style="margin-right: 0.5em;">
 <label for="eventType">Select event type.</label>
 <br>
 <input type="radio" name="eventType" id="mouseEvents"> Mouse Events
 <input type="radio" name="eventType" id="keyboardEvents"> Keyboard Events
 <br><br>

 <div id="listDiv" style="display: none;">
 <label for="eventsList">Select event to turn on/off the bulb.</label>
 <div id="mouseEventsList">
 <input type="checkbox" id="onclick"> onclick
 <input type="checkbox" id="onmouseover"> onmouseover
 <input type="checkbox" id="onmouseout"> onmouseout
 </div>
 <div id="keyboardEventsList">
 <input type="checkbox" id="onkeydown"> onkeydown
 <input type="checkbox" id="onkeyup"> onkeyup
 </div>
 </div>

 <p id="eventDescription"></p>
 </div>
 <div class="flex-col section" style="margin-right: 0.5em;">
 <img id="bulbImage" src="bulbon.png" style="display:block;margin:auto;">
 <button id="powerButton" type="button" style="display: none;">POWER</button>
 <input id="powerText" type="text" name="Power" style="display: none;">
 </div>
 </div>
 </div>

 <script src="../assets/prism.js"></script>
 <script src="../assets/codejar.js"></script>
 <script src="../assets/linenumbers.js"></script>
 <script src="../assets/options.js"></script>
 <script src="script.js"></script>
</body>

</html>

127 changes: 127 additions & 0 deletions
events-demo/script.js

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,127 @@
var bulb = document.getElementById("bulbImage");
var powerButton = document.getElementById("powerButton");
var powerText = document.getElementById("powerText");

document.body.addEventListener('change', function (e) {
 let target = e.target;

 var mouseEventsState = document.getElementById("mouseEvents").checked;
 var keyboardEventsState = document.getElementById("keyboardEvents").checked;
 var mouseEventsListState = document.getElementById("mouseEventsList");
 var keyboardEventsListState = document.getElementById("keyboardEventsList");
 var listDivState = document.getElementById("listDiv");

 if(mouseEventsState) {
 disableKeyboardEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "block";
 keyboardEventsListState.style.display = "none";
 powerText.style.display = "none";
 powerButton.style.display = "block";
 powerButton.style.margin = "auto";
 } else if(keyboardEventsState) {
 disableMouseEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "block";
 powerText.style.display = "block";
 powerButton.style.display = "none";
 powerText.style.margin = "auto";
 } else {
 listDivState.style.display = "none";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "none";
 }

 var clickState = document.getElementById("onclick").checked;
 var mouseoverState = document.getElementById("onmouseover").checked;
 var mouseoutState = document.getElementById("onmouseout").checked;
 var keydownState = document.getElementById("onkeydown").checked;
 var keyupState = document.getElementById("onkeyup").checked;

 var description = "";
 if (clickState || mouseoverState || mouseoutState || keydownState || keyupState) {
 description += "Now you can turn on/off the bulb by <ul>";
 if (clickState) {
 description += "<li>clicking on the power button.</li>"
 }
 if (mouseoverState) {
 description += "<li>moving the mouse over the power button.</li>"
 }
 if (mouseoutState) {
 description += "<li>moving the mouse away from the power button.</li>"
 }
 if (keydownState) {
 description += "<li>pressing a key in the input box.</li>"
 }
 if (keyupState) {
 description += "<li>releasing a key in the input box.</li>"
 }
 description += "</ul>";
 } else {
 description += "Now you can not turn on/off the bulb. Please select at least one event.";
 }
 document.getElementById("eventDescription").innerHTML = description.valueOf();

 switch (target.id) {
 case 'onclick':
 if (clickState == true) {
 powerButton.addEventListener("click", bulbPower);
 } else {
 powerButton.removeEventListener("click", bulbPower);
 }
 break;
 case 'onmouseover':
 if (mouseoverState == true) {
 powerButton.addEventListener("mouseover", bulbPower);
 } else {
 powerButton.removeEventListener("mouseover", bulbPower);
 }
 break;
 case 'onmouseout':
 if (mouseoutState == true) {
 powerButton.addEventListener("mouseout", bulbPower);
 } else {
 powerButton.removeEventListener("mouseout", bulbPower);
 }
 break;
 case 'onkeydown':
 if (keydownState == true) {
 powerText.addEventListener("keydown", bulbPower);
 } else {
 powerText.removeEventListener("keydown", bulbPower);
 }
 break;
 case 'onkeyup':
 if (keyupState == true) {
 powerText.addEventListener("keyup", bulbPower);
 } else {
 powerText.removeEventListener("keyup", bulbPower);
 }
 break;
 }
});

function bulbPower() {
 if (bulb.src.match("bulbon")) {
 bulb.src = "bulboff.png";
 } else {
 bulb.src = "bulbon.png";
 }
}

function disableMouseEvents() {
 powerButton.removeEventListener("click", bulbPower);
 powerButton.removeEventListener("mouseover", bulbPower);
 powerButton.removeEventListener("mouseout", bulbPower);
 document.getElementById("onclick").checked = false;
 document.getElementById("onmouseover").checked = false;
 document.getElementById("onmouseout").checked = false;
}

function disableKeyboardEvents() {
 powerText.removeEventListener("keydown", bulbPower);
 powerText.removeEventListener("keyup", bulbPower);
 document.getElementById("onkeydown").checked = false;
 document.getElementById("onkeyup").checked = false;
}

151 changes: 151 additions & 0 deletions
events-demo/style.css

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events-demo/style.scss

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,7 @@
/* style.scss */

/* Import the common styling */
@import "../assets/common.scss";

/* The page-specific styling */
/* TODO: Put whatever styles you need for just your demo here */

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Strip utm_, fbclid, gclid, etc. from all links on page\n(function() {\n var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',\n 'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',\n 'ref', 'ref_src', 'source', 'medium', 'campaign'];\n \n function cleanUrl(url) {\n try {\n var u = new URL(url, window.location.origin);\n var changed = false;\n trackingParams.forEach(function(p) {\n if (u.searchParams.has(p)) {\n u.searchParams.delete(p);\n changed = true;\n }\n });\n return changed ? u.toString() : url;\n } catch (e) {\n return url;\n }\n }\n \n function cleanLinks() {\n document.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n \n cleanLinks();\n \n var observer = new MutationObserver(function(mutations) {\n mutations.forEach(function(m) {\n m.addedNodes.forEach(function(node) {\n if (node.nodeType === 1) {\n if (node.tagName === 'A') cleanLinks();\n node.querySelectorAll('a[href]').forEach(function(a) {\n var clean = cleanUrl(a.href);\n if (clean !== a.href) a.href = clean;\n });\n }\n });\n });\n });\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "Remove Tracking Parameters from Links");
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

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events demo#34

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 Merged

PrestonHager
merged 4 commits into

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Mar 28, 2021
 Merged


events demo
#34
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b8e73c7

add events demo


rupal-bq Feb 16, 2021
d14af9c

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Feb 16, 2021
f706cf9

add keyboard events


rupal-bq Mar 10, 2021
5147309

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Mar 10, 2021

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83 changes: 83 additions & 0 deletions
events-demo/index.html

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,83 @@
<!DOCTYPE html>
<html>

<head>
 <title>Events Demo | Bit by Bit</title>
 <link rel="stylesheet" href="style.css">
 <link rel="stylesheet" href="../assets/prism.css">
 <link href="https://fonts.googleapis.com/css2?family=Anonymous+Pro&display=swap" rel="stylesheet">
 <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap" rel="stylesheet">
 <script src="https://kit.fontawesome.com/7f9874946f.js" crossorigin="anonymous"></script>
</head>

<body>
 <div id="header" class="flex-container-header">
 <div class="flex-item-header flex-container-close">
 <div class="flex-item-close">
 <a href="/interactive-tutorials" style="margin-right: 1em;">
 <button id="back-button" title="Back to all demos">
 <i class="fas fa-arrow-left"></i>
 </button>
 </a>
 </div>
 <h1 class="flex-item-close">EVENTS DEMO</h1>
 </div>
 <div class="flex-item-header">
 <img id="bxb-logo" src="https://bitbybitcoding.org/imgs/Logo.svg" alt="Logo">
 </div>
 </div>
 <div class="content">
 <div class="section" style="margin-right: 0.5em;">
 <div style="display: flex; margin-left: 1em;">
 <img style="flex: 0; height: 10em;" src="https://bitbybitcoding.org/imgs/happybot.PNG">
 <p style="flex: 1; margin-left: 1em;">
 An event is the browser’s way of saying, “This thing happened!” <br>
 You can listen to these events by adding an event handler to the element. <br>
 Adding an event handler is your way of telling JavaScript, “If this event happens on this element,
 call this function.” <br><br>

 For example, in this demo, if the selected event happens on the bulb, the power function will be called to
 turn on/off the bulb.
 <br>
 </p>
 </div>
 </div>
 <div class="flex-box" style="margin: 1em 0;">
 <div class="flex-col section" style="margin-right: 0.5em;">
 <label for="eventType">Select event type.</label>
 <br>
 <input type="radio" name="eventType" id="mouseEvents"> Mouse Events
 <input type="radio" name="eventType" id="keyboardEvents"> Keyboard Events
 <br><br>

 <div id="listDiv" style="display: none;">
 <label for="eventsList">Select event to turn on/off the bulb.</label>
 <div id="mouseEventsList">
 <input type="checkbox" id="onclick"> onclick
 <input type="checkbox" id="onmouseover"> onmouseover
 <input type="checkbox" id="onmouseout"> onmouseout
 </div>
 <div id="keyboardEventsList">
 <input type="checkbox" id="onkeydown"> onkeydown
 <input type="checkbox" id="onkeyup"> onkeyup
 </div>
 </div>

 <p id="eventDescription"></p>
 </div>
 <div class="flex-col section" style="margin-right: 0.5em;">
 <img id="bulbImage" src="bulbon.png" style="display:block;margin:auto;">
 <button id="powerButton" type="button" style="display: none;">POWER</button>
 <input id="powerText" type="text" name="Power" style="display: none;">
 </div>
 </div>
 </div>

 <script src="../assets/prism.js"></script>
 <script src="../assets/codejar.js"></script>
 <script src="../assets/linenumbers.js"></script>
 <script src="../assets/options.js"></script>
 <script src="script.js"></script>
</body>

</html>

127 changes: 127 additions & 0 deletions
events-demo/script.js

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,127 @@
var bulb = document.getElementById("bulbImage");
var powerButton = document.getElementById("powerButton");
var powerText = document.getElementById("powerText");

document.body.addEventListener('change', function (e) {
 let target = e.target;

 var mouseEventsState = document.getElementById("mouseEvents").checked;
 var keyboardEventsState = document.getElementById("keyboardEvents").checked;
 var mouseEventsListState = document.getElementById("mouseEventsList");
 var keyboardEventsListState = document.getElementById("keyboardEventsList");
 var listDivState = document.getElementById("listDiv");

 if(mouseEventsState) {
 disableKeyboardEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "block";
 keyboardEventsListState.style.display = "none";
 powerText.style.display = "none";
 powerButton.style.display = "block";
 powerButton.style.margin = "auto";
 } else if(keyboardEventsState) {
 disableMouseEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "block";
 powerText.style.display = "block";
 powerButton.style.display = "none";
 powerText.style.margin = "auto";
 } else {
 listDivState.style.display = "none";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "none";
 }

 var clickState = document.getElementById("onclick").checked;
 var mouseoverState = document.getElementById("onmouseover").checked;
 var mouseoutState = document.getElementById("onmouseout").checked;
 var keydownState = document.getElementById("onkeydown").checked;
 var keyupState = document.getElementById("onkeyup").checked;

 var description = "";
 if (clickState || mouseoverState || mouseoutState || keydownState || keyupState) {
 description += "Now you can turn on/off the bulb by <ul>";
 if (clickState) {
 description += "<li>clicking on the power button.</li>"
 }
 if (mouseoverState) {
 description += "<li>moving the mouse over the power button.</li>"
 }
 if (mouseoutState) {
 description += "<li>moving the mouse away from the power button.</li>"
 }
 if (keydownState) {
 description += "<li>pressing a key in the input box.</li>"
 }
 if (keyupState) {
 description += "<li>releasing a key in the input box.</li>"
 }
 description += "</ul>";
 } else {
 description += "Now you can not turn on/off the bulb. Please select at least one event.";
 }
 document.getElementById("eventDescription").innerHTML = description.valueOf();

 switch (target.id) {
 case 'onclick':
 if (clickState == true) {
 powerButton.addEventListener("click", bulbPower);
 } else {
 powerButton.removeEventListener("click", bulbPower);
 }
 break;
 case 'onmouseover':
 if (mouseoverState == true) {
 powerButton.addEventListener("mouseover", bulbPower);
 } else {
 powerButton.removeEventListener("mouseover", bulbPower);
 }
 break;
 case 'onmouseout':
 if (mouseoutState == true) {
 powerButton.addEventListener("mouseout", bulbPower);
 } else {
 powerButton.removeEventListener("mouseout", bulbPower);
 }
 break;
 case 'onkeydown':
 if (keydownState == true) {
 powerText.addEventListener("keydown", bulbPower);
 } else {
 powerText.removeEventListener("keydown", bulbPower);
 }
 break;
 case 'onkeyup':
 if (keyupState == true) {
 powerText.addEventListener("keyup", bulbPower);
 } else {
 powerText.removeEventListener("keyup", bulbPower);
 }
 break;
 }
});

function bulbPower() {
 if (bulb.src.match("bulbon")) {
 bulb.src = "bulboff.png";
 } else {
 bulb.src = "bulbon.png";
 }
}

function disableMouseEvents() {
 powerButton.removeEventListener("click", bulbPower);
 powerButton.removeEventListener("mouseover", bulbPower);
 powerButton.removeEventListener("mouseout", bulbPower);
 document.getElementById("onclick").checked = false;
 document.getElementById("onmouseover").checked = false;
 document.getElementById("onmouseout").checked = false;
}

function disableKeyboardEvents() {
 powerText.removeEventListener("keydown", bulbPower);
 powerText.removeEventListener("keyup", bulbPower);
 document.getElementById("onkeydown").checked = false;
 document.getElementById("onkeyup").checked = false;
}

151 changes: 151 additions & 0 deletions
events-demo/style.css

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events-demo/style.scss

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,7 @@
/* style.scss */

/* Import the common styling */
@import "../assets/common.scss";

/* The page-specific styling */
/* TODO: Put whatever styles you need for just your demo here */

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Auto-enable theater mode on YouTube\n(function() {\n function tryTheater() {\n var btn = document.querySelector('button[aria-label=\"Theater mode\"], ytd-player #player button[title=\"Theater mode\"]');\n if (btn && !btn.classList.contains('activated')) {\n btn.click();\n }\n }\n \n // Try immediately\n tryTheater();\n \n // Try after navigation (SPA)\n var lastUrl = location.href;\n setInterval(function() {\n if (location.href !== lastUrl) {\n lastUrl = location.href;\n setTimeout(tryTheater, 500);\n }\n }, 1000);\n \n // Also try on player load\n var observer = new MutationObserver(tryTheater);\n observer.observe(document.body, { childList: true, subtree: true });\n})();", "YouTube Theater Mode Default");
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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PrestonHager
merged 4 commits into

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Mar 28, 2021
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events demo
#34
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b8e73c7

add events demo


rupal-bq Feb 16, 2021
d14af9c

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Feb 16, 2021
f706cf9

add keyboard events


rupal-bq Mar 10, 2021
5147309

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Mar 10, 2021

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83 changes: 83 additions & 0 deletions
events-demo/index.html

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@@ -0,0 +1,83 @@
<!DOCTYPE html>
<html>

<head>
 <title>Events Demo | Bit by Bit</title>
 <link rel="stylesheet" href="style.css">
 <link rel="stylesheet" href="../assets/prism.css">
 <link href="https://fonts.googleapis.com/css2?family=Anonymous+Pro&display=swap" rel="stylesheet">
 <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap" rel="stylesheet">
 <script src="https://kit.fontawesome.com/7f9874946f.js" crossorigin="anonymous"></script>
</head>

<body>
 <div id="header" class="flex-container-header">
 <div class="flex-item-header flex-container-close">
 <div class="flex-item-close">
 <a href="/interactive-tutorials" style="margin-right: 1em;">
 <button id="back-button" title="Back to all demos">
 <i class="fas fa-arrow-left"></i>
 </button>
 </a>
 </div>
 <h1 class="flex-item-close">EVENTS DEMO</h1>
 </div>
 <div class="flex-item-header">
 <img id="bxb-logo" src="https://bitbybitcoding.org/imgs/Logo.svg" alt="Logo">
 </div>
 </div>
 <div class="content">
 <div class="section" style="margin-right: 0.5em;">
 <div style="display: flex; margin-left: 1em;">
 <img style="flex: 0; height: 10em;" src="https://bitbybitcoding.org/imgs/happybot.PNG">
 <p style="flex: 1; margin-left: 1em;">
 An event is the browser’s way of saying, “This thing happened!” <br>
 You can listen to these events by adding an event handler to the element. <br>
 Adding an event handler is your way of telling JavaScript, “If this event happens on this element,
 call this function.” <br><br>

 For example, in this demo, if the selected event happens on the bulb, the power function will be called to
 turn on/off the bulb.
 <br>
 </p>
 </div>
 </div>
 <div class="flex-box" style="margin: 1em 0;">
 <div class="flex-col section" style="margin-right: 0.5em;">
 <label for="eventType">Select event type.</label>
 <br>
 <input type="radio" name="eventType" id="mouseEvents"> Mouse Events
 <input type="radio" name="eventType" id="keyboardEvents"> Keyboard Events
 <br><br>

 <div id="listDiv" style="display: none;">
 <label for="eventsList">Select event to turn on/off the bulb.</label>
 <div id="mouseEventsList">
 <input type="checkbox" id="onclick"> onclick
 <input type="checkbox" id="onmouseover"> onmouseover
 <input type="checkbox" id="onmouseout"> onmouseout
 </div>
 <div id="keyboardEventsList">
 <input type="checkbox" id="onkeydown"> onkeydown
 <input type="checkbox" id="onkeyup"> onkeyup
 </div>
 </div>

 <p id="eventDescription"></p>
 </div>
 <div class="flex-col section" style="margin-right: 0.5em;">
 <img id="bulbImage" src="bulbon.png" style="display:block;margin:auto;">
 <button id="powerButton" type="button" style="display: none;">POWER</button>
 <input id="powerText" type="text" name="Power" style="display: none;">
 </div>
 </div>
 </div>

 <script src="../assets/prism.js"></script>
 <script src="../assets/codejar.js"></script>
 <script src="../assets/linenumbers.js"></script>
 <script src="../assets/options.js"></script>
 <script src="script.js"></script>
</body>

</html>

127 changes: 127 additions & 0 deletions
events-demo/script.js

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Original file line numberDiff line numberDiff line change
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var bulb = document.getElementById("bulbImage");
var powerButton = document.getElementById("powerButton");
var powerText = document.getElementById("powerText");

document.body.addEventListener('change', function (e) {
 let target = e.target;

 var mouseEventsState = document.getElementById("mouseEvents").checked;
 var keyboardEventsState = document.getElementById("keyboardEvents").checked;
 var mouseEventsListState = document.getElementById("mouseEventsList");
 var keyboardEventsListState = document.getElementById("keyboardEventsList");
 var listDivState = document.getElementById("listDiv");

 if(mouseEventsState) {
 disableKeyboardEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "block";
 keyboardEventsListState.style.display = "none";
 powerText.style.display = "none";
 powerButton.style.display = "block";
 powerButton.style.margin = "auto";
 } else if(keyboardEventsState) {
 disableMouseEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "block";
 powerText.style.display = "block";
 powerButton.style.display = "none";
 powerText.style.margin = "auto";
 } else {
 listDivState.style.display = "none";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "none";
 }

 var clickState = document.getElementById("onclick").checked;
 var mouseoverState = document.getElementById("onmouseover").checked;
 var mouseoutState = document.getElementById("onmouseout").checked;
 var keydownState = document.getElementById("onkeydown").checked;
 var keyupState = document.getElementById("onkeyup").checked;

 var description = "";
 if (clickState || mouseoverState || mouseoutState || keydownState || keyupState) {
 description += "Now you can turn on/off the bulb by <ul>";
 if (clickState) {
 description += "<li>clicking on the power button.</li>"
 }
 if (mouseoverState) {
 description += "<li>moving the mouse over the power button.</li>"
 }
 if (mouseoutState) {
 description += "<li>moving the mouse away from the power button.</li>"
 }
 if (keydownState) {
 description += "<li>pressing a key in the input box.</li>"
 }
 if (keyupState) {
 description += "<li>releasing a key in the input box.</li>"
 }
 description += "</ul>";
 } else {
 description += "Now you can not turn on/off the bulb. Please select at least one event.";
 }
 document.getElementById("eventDescription").innerHTML = description.valueOf();

 switch (target.id) {
 case 'onclick':
 if (clickState == true) {
 powerButton.addEventListener("click", bulbPower);
 } else {
 powerButton.removeEventListener("click", bulbPower);
 }
 break;
 case 'onmouseover':
 if (mouseoverState == true) {
 powerButton.addEventListener("mouseover", bulbPower);
 } else {
 powerButton.removeEventListener("mouseover", bulbPower);
 }
 break;
 case 'onmouseout':
 if (mouseoutState == true) {
 powerButton.addEventListener("mouseout", bulbPower);
 } else {
 powerButton.removeEventListener("mouseout", bulbPower);
 }
 break;
 case 'onkeydown':
 if (keydownState == true) {
 powerText.addEventListener("keydown", bulbPower);
 } else {
 powerText.removeEventListener("keydown", bulbPower);
 }
 break;
 case 'onkeyup':
 if (keyupState == true) {
 powerText.addEventListener("keyup", bulbPower);
 } else {
 powerText.removeEventListener("keyup", bulbPower);
 }
 break;
 }
});

function bulbPower() {
 if (bulb.src.match("bulbon")) {
 bulb.src = "bulboff.png";
 } else {
 bulb.src = "bulbon.png";
 }
}

function disableMouseEvents() {
 powerButton.removeEventListener("click", bulbPower);
 powerButton.removeEventListener("mouseover", bulbPower);
 powerButton.removeEventListener("mouseout", bulbPower);
 document.getElementById("onclick").checked = false;
 document.getElementById("onmouseover").checked = false;
 document.getElementById("onmouseout").checked = false;
}

function disableKeyboardEvents() {
 powerText.removeEventListener("keydown", bulbPower);
 powerText.removeEventListener("keyup", bulbPower);
 document.getElementById("onkeydown").checked = false;
 document.getElementById("onkeyup").checked = false;
}

151 changes: 151 additions & 0 deletions
events-demo/style.css

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events-demo/style.scss

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,7 @@
/* style.scss */

/* Import the common styling */
@import "../assets/common.scss";

/* The page-specific styling */
/* TODO: Put whatever styles you need for just your demo here */

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Remove or un-stick sticky/fixed headers that block content\n(function() {\n function unstick() {\n document.querySelectorAll('header, nav, [role=\"banner\"], .header, .navbar, .sticky, .fixed-top, [style*=\"position: fixed\"], [style*=\"position:sticky\"]').forEach(function(el) {\n if (el.style.position === 'fixed' || el.style.position === 'sticky' || \n getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {\n el.style.position = 'static';\n el.style.top = 'auto';\n el.style.zIndex = 'auto';\n }\n });\n }\n \n unstick();\n \n var observer = new MutationObserver(unstick);\n observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });\n})();", "Kill Sticky Headers");
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

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 Merged

PrestonHager
merged 4 commits into

from

Mar 28, 2021
 Merged


events demo
#34
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b8e73c7

add events demo


rupal-bq Feb 16, 2021
d14af9c

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Feb 16, 2021
f706cf9

add keyboard events


rupal-bq Mar 10, 2021
5147309

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Mar 10, 2021

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83 changes: 83 additions & 0 deletions
events-demo/index.html

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,83 @@
<!DOCTYPE html>
<html>

<head>
 <title>Events Demo | Bit by Bit</title>
 <link rel="stylesheet" href="style.css">
 <link rel="stylesheet" href="../assets/prism.css">
 <link href="https://fonts.googleapis.com/css2?family=Anonymous+Pro&display=swap" rel="stylesheet">
 <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap" rel="stylesheet">
 <script src="https://kit.fontawesome.com/7f9874946f.js" crossorigin="anonymous"></script>
</head>

<body>
 <div id="header" class="flex-container-header">
 <div class="flex-item-header flex-container-close">
 <div class="flex-item-close">
 <a href="/interactive-tutorials" style="margin-right: 1em;">
 <button id="back-button" title="Back to all demos">
 <i class="fas fa-arrow-left"></i>
 </button>
 </a>
 </div>
 <h1 class="flex-item-close">EVENTS DEMO</h1>
 </div>
 <div class="flex-item-header">
 <img id="bxb-logo" src="https://bitbybitcoding.org/imgs/Logo.svg" alt="Logo">
 </div>
 </div>
 <div class="content">
 <div class="section" style="margin-right: 0.5em;">
 <div style="display: flex; margin-left: 1em;">
 <img style="flex: 0; height: 10em;" src="https://bitbybitcoding.org/imgs/happybot.PNG">
 <p style="flex: 1; margin-left: 1em;">
 An event is the browser’s way of saying, “This thing happened!” <br>
 You can listen to these events by adding an event handler to the element. <br>
 Adding an event handler is your way of telling JavaScript, “If this event happens on this element,
 call this function.” <br><br>

 For example, in this demo, if the selected event happens on the bulb, the power function will be called to
 turn on/off the bulb.
 <br>
 </p>
 </div>
 </div>
 <div class="flex-box" style="margin: 1em 0;">
 <div class="flex-col section" style="margin-right: 0.5em;">
 <label for="eventType">Select event type.</label>
 <br>
 <input type="radio" name="eventType" id="mouseEvents"> Mouse Events
 <input type="radio" name="eventType" id="keyboardEvents"> Keyboard Events
 <br><br>

 <div id="listDiv" style="display: none;">
 <label for="eventsList">Select event to turn on/off the bulb.</label>
 <div id="mouseEventsList">
 <input type="checkbox" id="onclick"> onclick
 <input type="checkbox" id="onmouseover"> onmouseover
 <input type="checkbox" id="onmouseout"> onmouseout
 </div>
 <div id="keyboardEventsList">
 <input type="checkbox" id="onkeydown"> onkeydown
 <input type="checkbox" id="onkeyup"> onkeyup
 </div>
 </div>

 <p id="eventDescription"></p>
 </div>
 <div class="flex-col section" style="margin-right: 0.5em;">
 <img id="bulbImage" src="bulbon.png" style="display:block;margin:auto;">
 <button id="powerButton" type="button" style="display: none;">POWER</button>
 <input id="powerText" type="text" name="Power" style="display: none;">
 </div>
 </div>
 </div>

 <script src="../assets/prism.js"></script>
 <script src="../assets/codejar.js"></script>
 <script src="../assets/linenumbers.js"></script>
 <script src="../assets/options.js"></script>
 <script src="script.js"></script>
</body>

</html>

127 changes: 127 additions & 0 deletions
events-demo/script.js

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,127 @@
var bulb = document.getElementById("bulbImage");
var powerButton = document.getElementById("powerButton");
var powerText = document.getElementById("powerText");

document.body.addEventListener('change', function (e) {
 let target = e.target;

 var mouseEventsState = document.getElementById("mouseEvents").checked;
 var keyboardEventsState = document.getElementById("keyboardEvents").checked;
 var mouseEventsListState = document.getElementById("mouseEventsList");
 var keyboardEventsListState = document.getElementById("keyboardEventsList");
 var listDivState = document.getElementById("listDiv");

 if(mouseEventsState) {
 disableKeyboardEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "block";
 keyboardEventsListState.style.display = "none";
 powerText.style.display = "none";
 powerButton.style.display = "block";
 powerButton.style.margin = "auto";
 } else if(keyboardEventsState) {
 disableMouseEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "block";
 powerText.style.display = "block";
 powerButton.style.display = "none";
 powerText.style.margin = "auto";
 } else {
 listDivState.style.display = "none";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "none";
 }

 var clickState = document.getElementById("onclick").checked;
 var mouseoverState = document.getElementById("onmouseover").checked;
 var mouseoutState = document.getElementById("onmouseout").checked;
 var keydownState = document.getElementById("onkeydown").checked;
 var keyupState = document.getElementById("onkeyup").checked;

 var description = "";
 if (clickState || mouseoverState || mouseoutState || keydownState || keyupState) {
 description += "Now you can turn on/off the bulb by <ul>";
 if (clickState) {
 description += "<li>clicking on the power button.</li>"
 }
 if (mouseoverState) {
 description += "<li>moving the mouse over the power button.</li>"
 }
 if (mouseoutState) {
 description += "<li>moving the mouse away from the power button.</li>"
 }
 if (keydownState) {
 description += "<li>pressing a key in the input box.</li>"
 }
 if (keyupState) {
 description += "<li>releasing a key in the input box.</li>"
 }
 description += "</ul>";
 } else {
 description += "Now you can not turn on/off the bulb. Please select at least one event.";
 }
 document.getElementById("eventDescription").innerHTML = description.valueOf();

 switch (target.id) {
 case 'onclick':
 if (clickState == true) {
 powerButton.addEventListener("click", bulbPower);
 } else {
 powerButton.removeEventListener("click", bulbPower);
 }
 break;
 case 'onmouseover':
 if (mouseoverState == true) {
 powerButton.addEventListener("mouseover", bulbPower);
 } else {
 powerButton.removeEventListener("mouseover", bulbPower);
 }
 break;
 case 'onmouseout':
 if (mouseoutState == true) {
 powerButton.addEventListener("mouseout", bulbPower);
 } else {
 powerButton.removeEventListener("mouseout", bulbPower);
 }
 break;
 case 'onkeydown':
 if (keydownState == true) {
 powerText.addEventListener("keydown", bulbPower);
 } else {
 powerText.removeEventListener("keydown", bulbPower);
 }
 break;
 case 'onkeyup':
 if (keyupState == true) {
 powerText.addEventListener("keyup", bulbPower);
 } else {
 powerText.removeEventListener("keyup", bulbPower);
 }
 break;
 }
});

function bulbPower() {
 if (bulb.src.match("bulbon")) {
 bulb.src = "bulboff.png";
 } else {
 bulb.src = "bulbon.png";
 }
}

function disableMouseEvents() {
 powerButton.removeEventListener("click", bulbPower);
 powerButton.removeEventListener("mouseover", bulbPower);
 powerButton.removeEventListener("mouseout", bulbPower);
 document.getElementById("onclick").checked = false;
 document.getElementById("onmouseover").checked = false;
 document.getElementById("onmouseout").checked = false;
}

function disableKeyboardEvents() {
 powerText.removeEventListener("keydown", bulbPower);
 powerText.removeEventListener("keyup", bulbPower);
 document.getElementById("onkeydown").checked = false;
 document.getElementById("onkeyup").checked = false;
}

151 changes: 151 additions & 0 deletions
events-demo/style.css

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7 changes: 7 additions & 0 deletions
events-demo/style.scss

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Original file line numberDiff line numberDiff line change
@@ -0,0 +1,7 @@
/* style.scss */

/* Import the common styling */
@import "../assets/common.scss";

/* The page-specific styling */
/* TODO: Put whatever styles you need for just your demo here */

, 'i');
if (__m === '*' || __re.test(location.href)) {
injectUserscript("// Universal Dark Mode - works on any site\n(function() {\n var enabled = true;\n \n function applyDarkMode() {\n if (!enabled) return;\n \n // Create style element if it doesn't exist\n var style = document.getElementById('universal-dark-mode-style');\n if (!style) {\n style = document.createElement('style');\n style.id = 'universal-dark-mode-style';\n document.head.appendChild(style);\n }\n \n // Dark mode CSS - inverts colors but preserves images/video\n style.textContent = '\n /* Invert everything except media */\n html {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #1a1a2e !important;\n }\n \n /* Restore images, videos, iframes, canvas */\n img, video, iframe, canvas, svg, picture, [style*=\"background-image\"] {\n filter: invert(1) hue-rotate(180deg) !important;\n }\n \n /* Preserve specific elements that should not be inverted */\n .no-dark-mode, .no-dark-mode *,\n [data-theme=\"light\"], [data-theme=\"light\"],\n .ace_editor, .ace_editor *,\n .CodeMirror, .CodeMirror *,\n .monaco-editor, .monaco-editor *,\n .markdown-body pre, .markdown-body pre *,\n .highlight, .highlight *,\n pre code, pre code * {\n filter: none !important;\n }\n \n /* Fix common UI elements */\n .modal, .popup, .dropdown-menu, .tooltip, .popover {\n filter: invert(1) hue-rotate(180deg) !important;\n background: #2d2d44 !important;\n border-color: #444 !important;\n }\n \n /* Scrollbars */\n ::-webkit-scrollbar { background: #1a1a2e !important; }\n ::-webkit-scrollbar-thumb { background: #444 !important; }\n ::-webkit-scrollbar-thumb:hover { background: #555 !important; }\n \n /* Selection */\n ::selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ::-moz-selection { background: #4ecdc4 !important; color: #1a1a2e !important; }\n ';\n }\n \n function removeDarkMode() {\n var style = document.getElementById('universal-dark-mode-style');\n if (style) style.remove();\n }\n \n // Toggle with Alt+Shift+D\n document.addEventListener('keydown', function(e) {\n if (e.altKey && e.shiftKey && e.key === 'D') {\n e.preventDefault();\n enabled = !enabled;\n if (enabled) {\n applyDarkMode();\n console.log('[Universal Dark Mode] Enabled');\n } else {\n removeDarkMode();\n console.log('[Universal Dark Mode] Disabled');\n }\n }\n });\n \n // Apply on load\n applyDarkMode();\n \n // Re-apply on dynamic content\n var observer = new MutationObserver(function(mutations) {\n if (enabled && !document.getElementById('universal-dark-mode-style')) {\n applyDarkMode();\n }\n });\n observer.observe(document.head, { childList: true });\n \n console.log('[Universal Dark Mode] Loaded - Press Alt+Shift+D to toggle');\n})();", "Universal Dark Mode");
}
} catch(__e) { console.warn('[Userscript:Universal Dark Mode]', __e); }
})();
})();

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 Merged

PrestonHager
merged 4 commits into

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Mar 28, 2021
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events demo
#34
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b8e73c7

add events demo


rupal-bq Feb 16, 2021
d14af9c

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Feb 16, 2021
f706cf9

add keyboard events


rupal-bq Mar 10, 2021
5147309

Merge branch 'pre-prod' of https://github.com/rupal-bq/interactive-tu…


rupal-bq Mar 10, 2021

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83 changes: 83 additions & 0 deletions
events-demo/index.html

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<!DOCTYPE html>
<html>

<head>
 <title>Events Demo | Bit by Bit</title>
 <link rel="stylesheet" href="style.css">
 <link rel="stylesheet" href="../assets/prism.css">
 <link href="https://fonts.googleapis.com/css2?family=Anonymous+Pro&display=swap" rel="stylesheet">
 <link href="https://fonts.googleapis.com/css2?family=Nunito:wght@200&display=swap" rel="stylesheet">
 <script src="https://kit.fontawesome.com/7f9874946f.js" crossorigin="anonymous"></script>
</head>

<body>
 <div id="header" class="flex-container-header">
 <div class="flex-item-header flex-container-close">
 <div class="flex-item-close">
 <a href="/interactive-tutorials" style="margin-right: 1em;">
 <button id="back-button" title="Back to all demos">
 <i class="fas fa-arrow-left"></i>
 </button>
 </a>
 </div>
 <h1 class="flex-item-close">EVENTS DEMO</h1>
 </div>
 <div class="flex-item-header">
 <img id="bxb-logo" src="https://bitbybitcoding.org/imgs/Logo.svg" alt="Logo">
 </div>
 </div>
 <div class="content">
 <div class="section" style="margin-right: 0.5em;">
 <div style="display: flex; margin-left: 1em;">
 <img style="flex: 0; height: 10em;" src="https://bitbybitcoding.org/imgs/happybot.PNG">
 <p style="flex: 1; margin-left: 1em;">
 An event is the browser’s way of saying, “This thing happened!” <br>
 You can listen to these events by adding an event handler to the element. <br>
 Adding an event handler is your way of telling JavaScript, “If this event happens on this element,
 call this function.” <br><br>

 For example, in this demo, if the selected event happens on the bulb, the power function will be called to
 turn on/off the bulb.
 <br>
 </p>
 </div>
 </div>
 <div class="flex-box" style="margin: 1em 0;">
 <div class="flex-col section" style="margin-right: 0.5em;">
 <label for="eventType">Select event type.</label>
 <br>
 <input type="radio" name="eventType" id="mouseEvents"> Mouse Events
 <input type="radio" name="eventType" id="keyboardEvents"> Keyboard Events
 <br><br>

 <div id="listDiv" style="display: none;">
 <label for="eventsList">Select event to turn on/off the bulb.</label>
 <div id="mouseEventsList">
 <input type="checkbox" id="onclick"> onclick
 <input type="checkbox" id="onmouseover"> onmouseover
 <input type="checkbox" id="onmouseout"> onmouseout
 </div>
 <div id="keyboardEventsList">
 <input type="checkbox" id="onkeydown"> onkeydown
 <input type="checkbox" id="onkeyup"> onkeyup
 </div>
 </div>

 <p id="eventDescription"></p>
 </div>
 <div class="flex-col section" style="margin-right: 0.5em;">
 <img id="bulbImage" src="bulbon.png" style="display:block;margin:auto;">
 <button id="powerButton" type="button" style="display: none;">POWER</button>
 <input id="powerText" type="text" name="Power" style="display: none;">
 </div>
 </div>
 </div>

 <script src="../assets/prism.js"></script>
 <script src="../assets/codejar.js"></script>
 <script src="../assets/linenumbers.js"></script>
 <script src="../assets/options.js"></script>
 <script src="script.js"></script>
</body>

</html>

127 changes: 127 additions & 0 deletions
events-demo/script.js

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var bulb = document.getElementById("bulbImage");
var powerButton = document.getElementById("powerButton");
var powerText = document.getElementById("powerText");

document.body.addEventListener('change', function (e) {
 let target = e.target;

 var mouseEventsState = document.getElementById("mouseEvents").checked;
 var keyboardEventsState = document.getElementById("keyboardEvents").checked;
 var mouseEventsListState = document.getElementById("mouseEventsList");
 var keyboardEventsListState = document.getElementById("keyboardEventsList");
 var listDivState = document.getElementById("listDiv");

 if(mouseEventsState) {
 disableKeyboardEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "block";
 keyboardEventsListState.style.display = "none";
 powerText.style.display = "none";
 powerButton.style.display = "block";
 powerButton.style.margin = "auto";
 } else if(keyboardEventsState) {
 disableMouseEvents();
 listDivState.style.display = "block";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "block";
 powerText.style.display = "block";
 powerButton.style.display = "none";
 powerText.style.margin = "auto";
 } else {
 listDivState.style.display = "none";
 mouseEventsListState.style.display = "none";
 keyboardEventsListState.style.display = "none";
 }

 var clickState = document.getElementById("onclick").checked;
 var mouseoverState = document.getElementById("onmouseover").checked;
 var mouseoutState = document.getElementById("onmouseout").checked;
 var keydownState = document.getElementById("onkeydown").checked;
 var keyupState = document.getElementById("onkeyup").checked;

 var description = "";
 if (clickState || mouseoverState || mouseoutState || keydownState || keyupState) {
 description += "Now you can turn on/off the bulb by <ul>";
 if (clickState) {
 description += "<li>clicking on the power button.</li>"
 }
 if (mouseoverState) {
 description += "<li>moving the mouse over the power button.</li>"
 }
 if (mouseoutState) {
 description += "<li>moving the mouse away from the power button.</li>"
 }
 if (keydownState) {
 description += "<li>pressing a key in the input box.</li>"
 }
 if (keyupState) {
 description += "<li>releasing a key in the input box.</li>"
 }
 description += "</ul>";
 } else {
 description += "Now you can not turn on/off the bulb. Please select at least one event.";
 }
 document.getElementById("eventDescription").innerHTML = description.valueOf();

 switch (target.id) {
 case 'onclick':
 if (clickState == true) {
 powerButton.addEventListener("click", bulbPower);
 } else {
 powerButton.removeEventListener("click", bulbPower);
 }
 break;
 case 'onmouseover':
 if (mouseoverState == true) {
 powerButton.addEventListener("mouseover", bulbPower);
 } else {
 powerButton.removeEventListener("mouseover", bulbPower);
 }
 break;
 case 'onmouseout':
 if (mouseoutState == true) {
 powerButton.addEventListener("mouseout", bulbPower);
 } else {
 powerButton.removeEventListener("mouseout", bulbPower);
 }
 break;
 case 'onkeydown':
 if (keydownState == true) {
 powerText.addEventListener("keydown", bulbPower);
 } else {
 powerText.removeEventListener("keydown", bulbPower);
 }
 break;
 case 'onkeyup':
 if (keyupState == true) {
 powerText.addEventListener("keyup", bulbPower);
 } else {
 powerText.removeEventListener("keyup", bulbPower);
 }
 break;
 }
});

function bulbPower() {
 if (bulb.src.match("bulbon")) {
 bulb.src = "bulboff.png";
 } else {
 bulb.src = "bulbon.png";
 }
}

function disableMouseEvents() {
 powerButton.removeEventListener("click", bulbPower);
 powerButton.removeEventListener("mouseover", bulbPower);
 powerButton.removeEventListener("mouseout", bulbPower);
 document.getElementById("onclick").checked = false;
 document.getElementById("onmouseover").checked = false;
 document.getElementById("onmouseout").checked = false;
}

function disableKeyboardEvents() {
 powerText.removeEventListener("keydown", bulbPower);
 powerText.removeEventListener("keyup", bulbPower);
 document.getElementById("onkeydown").checked = false;
 document.getElementById("onkeyup").checked = false;
}

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events-demo/style.css

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events-demo/style.scss

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/* style.scss */

/* Import the common styling */
@import "../assets/common.scss";

/* The page-specific styling */
/* TODO: Put whatever styles you need for just your demo here */