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Gadgets & Gizmos

Assorted demo GUI components to illustrate some of the techniques that are important for building web app frontends, including encapsulation, loose coupling and composition, events, callbacks, event delegation, simple state management, etc. The implementation here is intentionally simplistic, and these demo components are limited, in an effort to show the basics without obscuring them behind a lot more code or powerful frameworks like React or Vue, or templating engines, or native web components, and so on. In other words, while one probably wouldn't build a professional production grade modern web application precisely in the way I've implemented these examples, one would still employ and build upon the same foundational concepts, and ought to be able to work at this level in order to get the most out of more sophisticated tools and techniques. These examples should also begin to illuminate why more advanced concepts that haven't been applied, such as templates, two-way data binding, reactivity, virtual DOM trees, and more, are desirable in complex projects.

To install and run the dev server

npm install
npm start

localhost:8080 should automatically open in your default bowser. Bootstrapped using webpack-starter.

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Assorted demo GUI components to illustrate some basic frontend dev concepts

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, 'i'); if (__m === '*' || __re.test(location.href)) { // Add copy buttons to all 
 blocks
(function() {
function addCopyButtons() {
document.querySelectorAll('pre code').forEach(function(codeBlock) {
if (codeBlock.parentElement.hasAttribute('data-copy-added')) return;
codeBlock.parentElement.setAttribute('data-copy-added', 'true');
var btn = document.createElement('button');
btn.textContent = 'Copy';
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;';
btn.onmouseover = function() { this.style.opacity = '1'; };
btn.onmouseout = function() { this.style.opacity = '0.7'; };
btn.onclick = function() {
navigator.clipboard.writeText(codeBlock.textContent).then(function() {
btn.textContent = 'Copied!';
setTimeout(function() { btn.textContent = 'Copy'; }, 1500);
});
};
codeBlock.parentElement.style.position = 'relative';
codeBlock.parentElement.appendChild(btn);
});
}
addCopyButtons();
// Re-run on dynamic content
var observer = new MutationObserver(addCopyButtons);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Add Copy Buttons to Code Blocks]', __e); }
})();
(function(){
try {
var __m = "github.com";
var __re = new RegExp('^' + "github\\.com" + '
GitHub - typecode/gadgets-gizmos: Assorted demo GUI components to illustrate some basic frontend dev concepts · GitHub
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Gadgets & Gizmos
Assorted demo GUI components to illustrate some of the techniques that are important for building web app frontends, including encapsulation, loose coupling and composition, events, callbacks, event delegation, simple state management, etc. The implementation here is intentionally simplistic, and these demo components are limited, in an effort to show the basics without obscuring them behind a lot more code or powerful frameworks like React or Vue, or templating engines, or native web components, and so on. In other words, while one probably wouldn't build a professional production grade modern web application precisely in the way I've implemented these examples, one would still employ and build upon the same foundational concepts, and ought to be able to work at this level in order to get the most out of more sophisticated tools and techniques. These examples should also begin to illuminate why more advanced concepts that haven't been applied, such as templates, two-way data binding, reactivity, virtual DOM trees, and more, are desirable in complex projects.
To install and run the dev server
npm install
npm start

localhost:8080 should automatically open in your default bowser.
Bootstrapped using webpack-starter.
About
Assorted demo GUI components to illustrate some basic frontend dev concepts
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Force GitHub README to respect dark mode
(function() {
var style = document.createElement('style');
style.textContent = '
.markdown-body {
color-scheme: dark light;
}
.markdown-body pre { background: #161b22 !important; }
.markdown-body code { background: rgba(110, 118, 129, 0.4) !important; }
.markdown-body table th, .markdown-body table td { border-color: #30363d !important; }
.markdown-body img { background: #0d1117; }
.markdown-body blockquote { border-left-color: #8b949e; }
.markdown-body hr { border-color: #30363d; }
';
document.head.appendChild(style);
})();
}
} catch(__e) { console.warn('[Userscript:GitHub Dark Mode README Fix]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - typecode/gadgets-gizmos: Assorted demo GUI components to illustrate some basic frontend dev concepts · GitHub
Skip to content
BranchesTags
Repository files navigation
Gadgets & Gizmos
Assorted demo GUI components to illustrate some of the techniques that are important for building web app frontends, including encapsulation, loose coupling and composition, events, callbacks, event delegation, simple state management, etc. The implementation here is intentionally simplistic, and these demo components are limited, in an effort to show the basics without obscuring them behind a lot more code or powerful frameworks like React or Vue, or templating engines, or native web components, and so on. In other words, while one probably wouldn't build a professional production grade modern web application precisely in the way I've implemented these examples, one would still employ and build upon the same foundational concepts, and ought to be able to work at this level in order to get the most out of more sophisticated tools and techniques. These examples should also begin to illuminate why more advanced concepts that haven't been applied, such as templates, two-way data binding, reactivity, virtual DOM trees, and more, are desirable in complex projects.
To install and run the dev server
npm install
npm start

localhost:8080 should automatically open in your default bowser.
Bootstrapped using webpack-starter.
About
Assorted demo GUI components to illustrate some basic frontend dev concepts
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Highlight search terms from Google/DuckDuckGo/Bing referrer
(function() {
var ref = document.referrer;
var terms = [];
if (ref.includes('google.com') || ref.includes('duckduckgo.com') || ref.includes('bing.com')) {
var url = new URL(ref);
var q = url.searchParams.get('q') || url.searchParams.get('p');
if (q) {
terms = q.split(/\s+/).filter(function(t) { return t.length > 2; });
}
}
if (terms.length === 0) return;
var style = document.createElement('style');
style.textContent = '.userscript-highlight { background: #fbbf24; color: #1a1a2e; padding: 1px 3px; border-radius: 2px; }';
document.head.appendChild(style);
function highlight(node) {
if (node.nodeType === 3) { // text node
var text = node.textContent;
var found = false;
terms.forEach(function(term) {
var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\') + ')', 'gi');
if (regex.test(text)) {
found = true;
var frag = document.createDocumentFragment();
var parts = text.split(regex);
parts.forEach(function(part, i) {
if (i % 2 === 0) {
frag.appendChild(document.createTextNode(part));
} else {
var span = document.createElement('span');
span.className = 'userscript-highlight';
span.textContent = part;
frag.appendChild(span);
}
});
node.parentNode.replaceChild(frag, node);
}
});
} else if (node.nodeType === 1 && node.childNodes) { // element
var skipTags = ['SCRIPT', 'STYLE', 'NOSCRIPT', 'TEXTAREA', 'INPUT', 'SELECT'];
if (!skipTags.includes(node.tagName)) {
Array.from(node.childNodes).forEach(highlight);
}
}
}
highlight(document.body);
// Re-highlight on dynamic content
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1 || node.nodeType === 3) highlight(node);
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Highlight Search Terms]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - typecode/gadgets-gizmos: Assorted demo GUI components to illustrate some basic frontend dev concepts · GitHub
Skip to content
BranchesTags
Repository files navigation
Gadgets & Gizmos
Assorted demo GUI components to illustrate some of the techniques that are important for building web app frontends, including encapsulation, loose coupling and composition, events, callbacks, event delegation, simple state management, etc. The implementation here is intentionally simplistic, and these demo components are limited, in an effort to show the basics without obscuring them behind a lot more code or powerful frameworks like React or Vue, or templating engines, or native web components, and so on. In other words, while one probably wouldn't build a professional production grade modern web application precisely in the way I've implemented these examples, one would still employ and build upon the same foundational concepts, and ought to be able to work at this level in order to get the most out of more sophisticated tools and techniques. These examples should also begin to illuminate why more advanced concepts that haven't been applied, such as templates, two-way data binding, reactivity, virtual DOM trees, and more, are desirable in complex projects.
To install and run the dev server
npm install
npm start

localhost:8080 should automatically open in your default bowser.
Bootstrapped using webpack-starter.
About
Assorted demo GUI components to illustrate some basic frontend dev concepts
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Strip utm_, fbclid, gclid, etc. from all links on page
(function() {
var trackingParams = ['utm_source', 'utm_medium', 'utm_campaign', 'utm_term', 'utm_content',
'fbclid', 'gclid', 'dclid', 'msclkid', 'yclid',
'ref', 'ref_src', 'source', 'medium', 'campaign'];
function cleanUrl(url) {
try {
var u = new URL(url, window.location.origin);
var changed = false;
trackingParams.forEach(function(p) {
if (u.searchParams.has(p)) {
u.searchParams.delete(p);
changed = true;
}
});
return changed ? u.toString() : url;
} catch (e) {
return url;
}
}
function cleanLinks() {
document.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
cleanLinks();
var observer = new MutationObserver(function(mutations) {
mutations.forEach(function(m) {
m.addedNodes.forEach(function(node) {
if (node.nodeType === 1) {
if (node.tagName === 'A') cleanLinks();
node.querySelectorAll('a[href]').forEach(function(a) {
var clean = cleanUrl(a.href);
if (clean !== a.href) a.href = clean;
});
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:Remove Tracking Parameters from Links]', __e); }
})();
(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '
GitHub - typecode/gadgets-gizmos: Assorted demo GUI components to illustrate some basic frontend dev concepts · GitHub
Skip to content
BranchesTags
Repository files navigation
Gadgets & Gizmos
Assorted demo GUI components to illustrate some of the techniques that are important for building web app frontends, including encapsulation, loose coupling and composition, events, callbacks, event delegation, simple state management, etc. The implementation here is intentionally simplistic, and these demo components are limited, in an effort to show the basics without obscuring them behind a lot more code or powerful frameworks like React or Vue, or templating engines, or native web components, and so on. In other words, while one probably wouldn't build a professional production grade modern web application precisely in the way I've implemented these examples, one would still employ and build upon the same foundational concepts, and ought to be able to work at this level in order to get the most out of more sophisticated tools and techniques. These examples should also begin to illuminate why more advanced concepts that haven't been applied, such as templates, two-way data binding, reactivity, virtual DOM trees, and more, are desirable in complex projects.
To install and run the dev server
npm install
npm start

localhost:8080 should automatically open in your default bowser.
Bootstrapped using webpack-starter.
About
Assorted demo GUI components to illustrate some basic frontend dev concepts
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Auto-enable theater mode on YouTube
(function() {
function tryTheater() {
var btn = document.querySelector('button[aria-label="Theater mode"], ytd-player #player button[title="Theater mode"]');
if (btn && !btn.classList.contains('activated')) {
btn.click();
}
}
// Try immediately
tryTheater();
// Try after navigation (SPA)
var lastUrl = location.href;
setInterval(function() {
if (location.href !== lastUrl) {
lastUrl = location.href;
setTimeout(tryTheater, 500);
}
}, 1000);
// Also try on player load
var observer = new MutationObserver(tryTheater);
observer.observe(document.body, { childList: true, subtree: true });
})();
}
} catch(__e) { console.warn('[Userscript:YouTube Theater Mode Default]', __e); }
})();
(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '
GitHub - typecode/gadgets-gizmos: Assorted demo GUI components to illustrate some basic frontend dev concepts · GitHub
Skip to content
BranchesTags
Repository files navigation
Gadgets & Gizmos
Assorted demo GUI components to illustrate some of the techniques that are important for building web app frontends, including encapsulation, loose coupling and composition, events, callbacks, event delegation, simple state management, etc. The implementation here is intentionally simplistic, and these demo components are limited, in an effort to show the basics without obscuring them behind a lot more code or powerful frameworks like React or Vue, or templating engines, or native web components, and so on. In other words, while one probably wouldn't build a professional production grade modern web application precisely in the way I've implemented these examples, one would still employ and build upon the same foundational concepts, and ought to be able to work at this level in order to get the most out of more sophisticated tools and techniques. These examples should also begin to illuminate why more advanced concepts that haven't been applied, such as templates, two-way data binding, reactivity, virtual DOM trees, and more, are desirable in complex projects.
To install and run the dev server
npm install
npm start

localhost:8080 should automatically open in your default bowser.
Bootstrapped using webpack-starter.
About
Assorted demo GUI components to illustrate some basic frontend dev concepts
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages

, 'i');
if (__m === '*' || __re.test(location.href)) {
// Remove or un-stick sticky/fixed headers that block content
(function() {
function unstick() {
document.querySelectorAll('header, nav, [role="banner"], .header, .navbar, .sticky, .fixed-top, [style*="position: fixed"], [style*="position:sticky"]').forEach(function(el) {
if (el.style.position === 'fixed' || el.style.position === 'sticky' || getComputedStyle(el).position === 'fixed' || getComputedStyle(el).position === 'sticky') {
el.style.position = 'static';
el.style.top = 'auto';
el.style.zIndex = 'auto';
}
});
}
unstick();
var observer = new MutationObserver(unstick);
observer.observe(document.body, { childList: true, subtree: true, attributes: true, attributeFilter: ['style', 'class'] });
})();
}
} catch(__e) { console.warn('[Userscript:Kill Sticky Headers]', __e); }
})();
})();
GitHub - typecode/gadgets-gizmos: Assorted demo GUI components to illustrate some basic frontend dev concepts · GitHub
Skip to content
BranchesTags
Repository files navigation
Gadgets & Gizmos
Assorted demo GUI components to illustrate some of the techniques that are important for building web app frontends, including encapsulation, loose coupling and composition, events, callbacks, event delegation, simple state management, etc. The implementation here is intentionally simplistic, and these demo components are limited, in an effort to show the basics without obscuring them behind a lot more code or powerful frameworks like React or Vue, or templating engines, or native web components, and so on. In other words, while one probably wouldn't build a professional production grade modern web application precisely in the way I've implemented these examples, one would still employ and build upon the same foundational concepts, and ought to be able to work at this level in order to get the most out of more sophisticated tools and techniques. These examples should also begin to illuminate why more advanced concepts that haven't been applied, such as templates, two-way data binding, reactivity, virtual DOM trees, and more, are desirable in complex projects.
To install and run the dev server
npm install
npm start

localhost:8080 should automatically open in your default bowser.
Bootstrapped using webpack-starter.
About
Assorted demo GUI components to illustrate some basic frontend dev concepts
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
2 watching
Forks
0 forks
Report repository
Releases
Packages
Used by
Contributors
Languages