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javascript-exercises

Coding exercises in JavaScript. For practice, for fun or for showing you belong to /r/iamverysmart.

Getting Started

Download or clone the repo to your local. Go into the directory and run npm install, once complete you can run tests in the appropriate directories. Some directories won't have test files, so you should just browser the README file for the question/challenge.

Your terminal should look something like below from the initial install to your first test run.

$ git clone https://github.com/markehost/javascript-exercises
$ cd javascript-exercises
$ npm install
$ cd factorial
$ npm test

This uses a TDD approach, look at the test.js file in each directory to see what needs to be implemented, write an index.js as the solution file. If there is no test file look at the README for the question/challenge.

Contributing

If you're want to contribute please adhere to the current structure.

  1. Create a directory
  2. Copy the contents from /factorial as a template (package.json, README.md & test.js).
  3. Modify the test file for your use case
  4. Provide as much detail in the README as you can. Try explaining what you're looking for in an answer.
  5. (optional) Provide a solution in the solutions branch with passing test cases or a detailed answer in teh README.

Credits

I used this project https://github.com/kolodny/exercises as a structural example. I wanted to do things a little different so I didn't fork the repo, but it's worth checking out for some solid JavaScript functions that lodash and underscore abstract away from us.

About

Coding exercises in JavaScript.

Topics

coding-exercisefunctional-programmingjavascriptjavascript-exercisesmochanodeshouldtesting

Resources

Readme
MIT license
Activity

Stars

0 stars

Watchers

3 watching

Forks

1 fork
Report repository

Releases

Packages

Contributors

Languages

, '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" + '

Skip to content
BranchesTags
Repository files navigation
javascript-exercises
Coding exercises in JavaScript. For practice, for fun or for showing you belong to /r/iamverysmart.
Getting Started
Download or clone the repo to your local. Go into the directory and run npm install, once complete you can run tests in the appropriate directories. Some directories won't have test files, so you should just browser the README file for the question/challenge.
Your terminal should look something like below from the initial install to your first test run.
$ git clone https://github.com/markehost/javascript-exercises
$ cd javascript-exercises
$ npm install
$ cd factorial
$ npm test
This uses a TDD approach, look at the test.js file in each directory to see what needs to be implemented, write an index.js as the solution file. If there is no test file look at the README for the question/challenge.
Contributing
If you're want to contribute please adhere to the current structure.
  1. Create a directory
  2. Copy the contents from /factorial as a template (package.json, README.md & test.js).
  3. Modify the test file for your use case
  4. Provide as much detail in the README as you can. Try explaining what you're looking for in an answer.
  5. (optional) Provide a solution in the solutions branch with passing test cases or a detailed answer in teh README.
Credits
I used this project https://github.com/kolodny/exercises as a structural example. I wanted to do things a little different so I didn't fork the repo, but it's worth checking out for some solid JavaScript functions that lodash and underscore abstract away from us.
About
Coding exercises in JavaScript.
Topics
coding-exercisefunctional-programmingjavascriptjavascript-exercisesmochanodeshouldtesting
Resources
Readme
MIT license
Activity
Stars
0 stars
Watchers
3 watching
Forks
1 fork
Report repository
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, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
javascript-exercises
Coding exercises in JavaScript. For practice, for fun or for showing you belong to /r/iamverysmart.
Getting Started
Download or clone the repo to your local. Go into the directory and run npm install, once complete you can run tests in the appropriate directories. Some directories won't have test files, so you should just browser the README file for the question/challenge.
Your terminal should look something like below from the initial install to your first test run.
$ git clone https://github.com/markehost/javascript-exercises
$ cd javascript-exercises
$ npm install
$ cd factorial
$ npm test
This uses a TDD approach, look at the test.js file in each directory to see what needs to be implemented, write an index.js as the solution file. If there is no test file look at the README for the question/challenge.
Contributing
If you're want to contribute please adhere to the current structure.
  1. Create a directory
  2. Copy the contents from /factorial as a template (package.json, README.md & test.js).
  3. Modify the test file for your use case
  4. Provide as much detail in the README as you can. Try explaining what you're looking for in an answer.
  5. (optional) Provide a solution in the solutions branch with passing test cases or a detailed answer in teh README.
Credits
I used this project https://github.com/kolodny/exercises as a structural example. I wanted to do things a little different so I didn't fork the repo, but it's worth checking out for some solid JavaScript functions that lodash and underscore abstract away from us.
About
Coding exercises in JavaScript.
Topics
coding-exercisefunctional-programmingjavascriptjavascript-exercisesmochanodeshouldtesting
Resources
Readme
MIT license
Activity
Stars
0 stars
Watchers
3 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
javascript-exercises
Coding exercises in JavaScript. For practice, for fun or for showing you belong to /r/iamverysmart.
Getting Started
Download or clone the repo to your local. Go into the directory and run npm install, once complete you can run tests in the appropriate directories. Some directories won't have test files, so you should just browser the README file for the question/challenge.
Your terminal should look something like below from the initial install to your first test run.
$ git clone https://github.com/markehost/javascript-exercises
$ cd javascript-exercises
$ npm install
$ cd factorial
$ npm test
This uses a TDD approach, look at the test.js file in each directory to see what needs to be implemented, write an index.js as the solution file. If there is no test file look at the README for the question/challenge.
Contributing
If you're want to contribute please adhere to the current structure.
  1. Create a directory
  2. Copy the contents from /factorial as a template (package.json, README.md & test.js).
  3. Modify the test file for your use case
  4. Provide as much detail in the README as you can. Try explaining what you're looking for in an answer.
  5. (optional) Provide a solution in the solutions branch with passing test cases or a detailed answer in teh README.
Credits
I used this project https://github.com/kolodny/exercises as a structural example. I wanted to do things a little different so I didn't fork the repo, but it's worth checking out for some solid JavaScript functions that lodash and underscore abstract away from us.
About
Coding exercises in JavaScript.
Topics
coding-exercisefunctional-programmingjavascriptjavascript-exercisesmochanodeshouldtesting
Resources
Readme
MIT license
Activity
Stars
0 stars
Watchers
3 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, '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" + '

Skip to content
BranchesTags
Repository files navigation
javascript-exercises
Coding exercises in JavaScript. For practice, for fun or for showing you belong to /r/iamverysmart.
Getting Started
Download or clone the repo to your local. Go into the directory and run npm install, once complete you can run tests in the appropriate directories. Some directories won't have test files, so you should just browser the README file for the question/challenge.
Your terminal should look something like below from the initial install to your first test run.
$ git clone https://github.com/markehost/javascript-exercises
$ cd javascript-exercises
$ npm install
$ cd factorial
$ npm test
This uses a TDD approach, look at the test.js file in each directory to see what needs to be implemented, write an index.js as the solution file. If there is no test file look at the README for the question/challenge.
Contributing
If you're want to contribute please adhere to the current structure.
  1. Create a directory
  2. Copy the contents from /factorial as a template (package.json, README.md & test.js).
  3. Modify the test file for your use case
  4. Provide as much detail in the README as you can. Try explaining what you're looking for in an answer.
  5. (optional) Provide a solution in the solutions branch with passing test cases or a detailed answer in teh README.
Credits
I used this project https://github.com/kolodny/exercises as a structural example. I wanted to do things a little different so I didn't fork the repo, but it's worth checking out for some solid JavaScript functions that lodash and underscore abstract away from us.
About
Coding exercises in JavaScript.
Topics
coding-exercisefunctional-programmingjavascriptjavascript-exercisesmochanodeshouldtesting
Resources
Readme
MIT license
Activity
Stars
0 stars
Watchers
3 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
javascript-exercises
Coding exercises in JavaScript. For practice, for fun or for showing you belong to /r/iamverysmart.
Getting Started
Download or clone the repo to your local. Go into the directory and run npm install, once complete you can run tests in the appropriate directories. Some directories won't have test files, so you should just browser the README file for the question/challenge.
Your terminal should look something like below from the initial install to your first test run.
$ git clone https://github.com/markehost/javascript-exercises
$ cd javascript-exercises
$ npm install
$ cd factorial
$ npm test
This uses a TDD approach, look at the test.js file in each directory to see what needs to be implemented, write an index.js as the solution file. If there is no test file look at the README for the question/challenge.
Contributing
If you're want to contribute please adhere to the current structure.
  1. Create a directory
  2. Copy the contents from /factorial as a template (package.json, README.md & test.js).
  3. Modify the test file for your use case
  4. Provide as much detail in the README as you can. Try explaining what you're looking for in an answer.
  5. (optional) Provide a solution in the solutions branch with passing test cases or a detailed answer in teh README.
Credits
I used this project https://github.com/kolodny/exercises as a structural example. I wanted to do things a little different so I didn't fork the repo, but it's worth checking out for some solid JavaScript functions that lodash and underscore abstract away from us.
About
Coding exercises in JavaScript.
Topics
coding-exercisefunctional-programmingjavascriptjavascript-exercisesmochanodeshouldtesting
Resources
Readme
MIT license
Activity
Stars
0 stars
Watchers
3 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, '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('^' + ".*" + '

Skip to content
BranchesTags
Repository files navigation
javascript-exercises
Coding exercises in JavaScript. For practice, for fun or for showing you belong to /r/iamverysmart.
Getting Started
Download or clone the repo to your local. Go into the directory and run npm install, once complete you can run tests in the appropriate directories. Some directories won't have test files, so you should just browser the README file for the question/challenge.
Your terminal should look something like below from the initial install to your first test run.
$ git clone https://github.com/markehost/javascript-exercises
$ cd javascript-exercises
$ npm install
$ cd factorial
$ npm test
This uses a TDD approach, look at the test.js file in each directory to see what needs to be implemented, write an index.js as the solution file. If there is no test file look at the README for the question/challenge.
Contributing
If you're want to contribute please adhere to the current structure.
  1. Create a directory
  2. Copy the contents from /factorial as a template (package.json, README.md & test.js).
  3. Modify the test file for your use case
  4. Provide as much detail in the README as you can. Try explaining what you're looking for in an answer.
  5. (optional) Provide a solution in the solutions branch with passing test cases or a detailed answer in teh README.
Credits
I used this project https://github.com/kolodny/exercises as a structural example. I wanted to do things a little different so I didn't fork the repo, but it's worth checking out for some solid JavaScript functions that lodash and underscore abstract away from us.
About
Coding exercises in JavaScript.
Topics
coding-exercisefunctional-programmingjavascriptjavascript-exercisesmochanodeshouldtesting
Resources
Readme
MIT license
Activity
Stars
0 stars
Watchers
3 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages

, '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); }
})();
})();

Skip to content
BranchesTags
Repository files navigation
javascript-exercises
Coding exercises in JavaScript. For practice, for fun or for showing you belong to /r/iamverysmart.
Getting Started
Download or clone the repo to your local. Go into the directory and run npm install, once complete you can run tests in the appropriate directories. Some directories won't have test files, so you should just browser the README file for the question/challenge.
Your terminal should look something like below from the initial install to your first test run.
$ git clone https://github.com/markehost/javascript-exercises
$ cd javascript-exercises
$ npm install
$ cd factorial
$ npm test
This uses a TDD approach, look at the test.js file in each directory to see what needs to be implemented, write an index.js as the solution file. If there is no test file look at the README for the question/challenge.
Contributing
If you're want to contribute please adhere to the current structure.
  1. Create a directory
  2. Copy the contents from /factorial as a template (package.json, README.md & test.js).
  3. Modify the test file for your use case
  4. Provide as much detail in the README as you can. Try explaining what you're looking for in an answer.
  5. (optional) Provide a solution in the solutions branch with passing test cases or a detailed answer in teh README.
Credits
I used this project https://github.com/kolodny/exercises as a structural example. I wanted to do things a little different so I didn't fork the repo, but it's worth checking out for some solid JavaScript functions that lodash and underscore abstract away from us.
About
Coding exercises in JavaScript.
Topics
coding-exercisefunctional-programmingjavascriptjavascript-exercisesmochanodeshouldtesting
Resources
Readme
MIT license
Activity
Stars
0 stars
Watchers
3 watching
Forks
1 fork
Report repository
Releases
Packages
Contributors
Languages