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React Exercise

This repo aims to work as a quick exercise to better understand react by creating the beginnings of a tictactoe game.

** IMPORTANT ** The curly braces around the comments are part of the comment, do not include them in your code!

Getting Started

  1. To get started navigate to this website: https://codepen.io/rennemannd/pen/zYOJzNB?editors=0010
  2. On this website ignore the html and css tags and only use the JS tab to write your react app.
  3. There are three main components to this code and each is missing something. The game class renders a Board component, and the Board component renders Square components.

Assignment

  1. Look for the TODO in the square class and replace the comment with code to set state.value to 'X'
  2. Look for the TODO in the Board class and add the missing part to return the div tag of squares.
  3. Look for the TODO in the Game class and add the code to render the Board component

About

This repo aims to work as a quick exercise to better understand react

Resources

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, '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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React Exercise
This repo aims to work as a quick exercise to better understand react by creating the beginnings of a tictactoe game.
** IMPORTANT **
The curly braces around the comments are part of the comment, do not include them in your code!
Getting Started
  1. To get started navigate to this website: https://codepen.io/rennemannd/pen/zYOJzNB?editors=0010
  2. On this website ignore the html and css tags and only use the JS tab to write your react app.
  3. There are three main components to this code and each is missing something. The game class renders a Board component, and the Board component renders Square components.
Assignment
  1. Look for the TODO in the square class and replace the comment with code to set state.value to 'X'
  2. Look for the TODO in the Board class and add the missing part to return the div tag of squares.
  3. Look for the TODO in the Game class and add the code to render the Board component
About
This repo aims to work as a quick exercise to better understand react
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
0 forks
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('^' + ".*" + '

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React Exercise
This repo aims to work as a quick exercise to better understand react by creating the beginnings of a tictactoe game.
** IMPORTANT **
The curly braces around the comments are part of the comment, do not include them in your code!
Getting Started
  1. To get started navigate to this website: https://codepen.io/rennemannd/pen/zYOJzNB?editors=0010
  2. On this website ignore the html and css tags and only use the JS tab to write your react app.
  3. There are three main components to this code and each is missing something. The game class renders a Board component, and the Board component renders Square components.
Assignment
  1. Look for the TODO in the square class and replace the comment with code to set state.value to 'X'
  2. Look for the TODO in the Board class and add the missing part to return the div tag of squares.
  3. Look for the TODO in the Game class and add the code to render the Board component
About
This repo aims to work as a quick exercise to better understand react
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, '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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4 Commits
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React Exercise
This repo aims to work as a quick exercise to better understand react by creating the beginnings of a tictactoe game.
** IMPORTANT **
The curly braces around the comments are part of the comment, do not include them in your code!
Getting Started
  1. To get started navigate to this website: https://codepen.io/rennemannd/pen/zYOJzNB?editors=0010
  2. On this website ignore the html and css tags and only use the JS tab to write your react app.
  3. There are three main components to this code and each is missing something. The game class renders a Board component, and the Board component renders Square components.
Assignment
  1. Look for the TODO in the square class and replace the comment with code to set state.value to 'X'
  2. Look for the TODO in the Board class and add the missing part to return the div tag of squares.
  3. Look for the TODO in the Game class and add the code to render the Board component
About
This repo aims to work as a quick exercise to better understand react
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, '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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4 Commits
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NameName
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README.md
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React Exercise
This repo aims to work as a quick exercise to better understand react by creating the beginnings of a tictactoe game.
** IMPORTANT **
The curly braces around the comments are part of the comment, do not include them in your code!
Getting Started
  1. To get started navigate to this website: https://codepen.io/rennemannd/pen/zYOJzNB?editors=0010
  2. On this website ignore the html and css tags and only use the JS tab to write your react app.
  3. There are three main components to this code and each is missing something. The game class renders a Board component, and the Board component renders Square components.
Assignment
  1. Look for the TODO in the square class and replace the comment with code to set state.value to 'X'
  2. Look for the TODO in the Board class and add the missing part to return the div tag of squares.
  3. Look for the TODO in the Game class and add the code to render the Board component
About
This repo aims to work as a quick exercise to better understand react
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, '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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4 Commits
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NameName
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README.md
README.md
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React Exercise
This repo aims to work as a quick exercise to better understand react by creating the beginnings of a tictactoe game.
** IMPORTANT **
The curly braces around the comments are part of the comment, do not include them in your code!
Getting Started
  1. To get started navigate to this website: https://codepen.io/rennemannd/pen/zYOJzNB?editors=0010
  2. On this website ignore the html and css tags and only use the JS tab to write your react app.
  3. There are three main components to this code and each is missing something. The game class renders a Board component, and the Board component renders Square components.
Assignment
  1. Look for the TODO in the square class and replace the comment with code to set state.value to 'X'
  2. Look for the TODO in the Board class and add the missing part to return the div tag of squares.
  3. Look for the TODO in the Game class and add the code to render the Board component
About
This repo aims to work as a quick exercise to better understand react
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, '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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React Exercise
This repo aims to work as a quick exercise to better understand react by creating the beginnings of a tictactoe game.
** IMPORTANT **
The curly braces around the comments are part of the comment, do not include them in your code!
Getting Started
  1. To get started navigate to this website: https://codepen.io/rennemannd/pen/zYOJzNB?editors=0010
  2. On this website ignore the html and css tags and only use the JS tab to write your react app.
  3. There are three main components to this code and each is missing something. The game class renders a Board component, and the Board component renders Square components.
Assignment
  1. Look for the TODO in the square class and replace the comment with code to set state.value to 'X'
  2. Look for the TODO in the Board class and add the missing part to return the div tag of squares.
  3. Look for the TODO in the Game class and add the code to render the Board component
About
This repo aims to work as a quick exercise to better understand react
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors

, '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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BranchesTags
Latest commit
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4 Commits
Folders and files
NameName
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README.md
README.md
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React Exercise
This repo aims to work as a quick exercise to better understand react by creating the beginnings of a tictactoe game.
** IMPORTANT **
The curly braces around the comments are part of the comment, do not include them in your code!
Getting Started
  1. To get started navigate to this website: https://codepen.io/rennemannd/pen/zYOJzNB?editors=0010
  2. On this website ignore the html and css tags and only use the JS tab to write your react app.
  3. There are three main components to this code and each is missing something. The game class renders a Board component, and the Board component renders Square components.
Assignment
  1. Look for the TODO in the square class and replace the comment with code to set state.value to 'X'
  2. Look for the TODO in the Board class and add the missing part to return the div tag of squares.
  3. Look for the TODO in the Game class and add the code to render the Board component
About
This repo aims to work as a quick exercise to better understand react
Resources
Readme
Activity
Custom properties
Stars
0 stars
Watchers
5 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors