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CSS Exercises

These exercises consist of a series of CSS-related tasks intended to complement the HTML and CSS content on The Odin Project (TOP). They should only be completed when instructed during the course of the curriculum.

When doing these exercises, please use all documentation and resources you need to accomplish them. You are not intended to have any of this stuff memorized at this point. Check the docs, use Google, and do what you need to do (besides checking the solutions) to get them done.

Important

We encourage you to practice your git skills by committing your changes and pushing them to your own fork. However, please DO NOT open a Pull Request to have your solutions merged into this repo or to show your solution. If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.

Contributing

If you have suggestions to improve an exercise, ideas for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our contributing guide.

How To Use These Exercises

  1. Fork and clone this repository. To learn how to fork a repository, see the GitHub documentation on how to fork a repo.
    • Copies of repositories on your machine are called clones. If you need help cloning to your local environment, you can learn how from the GitHub documentation on cloning a repository.
  2. Go to an exercise directory and open the HTML file in a web browser. You can open the file directly or use something like VSCode's Live Server extension.
  3. For each exercise, read the README thoroughly before starting any work.
    • Each README has a "Self Check" list. Use this to ensure you haven't missed any important details in your implementation.
  4. Make your edits in the index.html and/or the style.css files in order to make the output in your browser look like the Desired Outcome image(s).
    • Depending on the instructions of the exercise, you may only need to make edits in one of these files.
  5. Once you successfully finish an exercise, check TOP's solution to compare it with yours.
    • You should not be checking the solution for an exercise until you finish it!
    • If your solution differs wildly from TOP's solution (and still passes the exercise's requirements), that's completely fine. Do feel free to ask about it in our Discord if there are parts you do not understand.

Important

Do not submit your solutions to this repo, as any PRs that do so will be closed without merging.

Some Hints

  • The official solutions put all changes at the end of the CSS file, which may duplicate some selectors (e.g. there might be a body {} in the given CSS and another body {} in the solution). When you are working on an exercise, it is best practice to add your CSS to existing selectors instead of duplicating them at the end of the file. We're sacrificing this best practice in our official solutions to make it extra clear to you what things we changed to solve the exercise.
  • Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using font: sans-serif bold 16px or that the margin is exactly42px.
  • You may need to add some elements to your HTML to get things into the right spot. (For the first few exercises, we make it explicit when this needs to happen.)
  • You may need to add more selectors to your CSS file. The first few exercises have almost everything already done for you, but as you progress, you'll find that you need to add more and more selectors to get the correct result.

About

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Readme
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Activity
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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" + '

Skip to content
BranchesTags
Repository files navigation
CSS Exercises
These exercises consist of a series of CSS-related tasks intended to complement the HTML and CSS content on The Odin Project (TOP). They should only be completed when instructed during the course of the curriculum.
When doing these exercises, please use all documentation and resources you need to accomplish them. You are not intended to have any of this stuff memorized at this point. Check the docs, use Google, and do what you need to do (besides checking the solutions) to get them done.
Important
We encourage you to practice your git skills by committing your changes and pushing them to your own fork. However, please DO NOT open a Pull Request to have your solutions merged into this repo or to show your solution. If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.
Contributing
If you have suggestions to improve an exercise, ideas for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our contributing guide.
How To Use These Exercises
  1. Fork and clone this repository. To learn how to fork a repository, see the GitHub documentation on how to fork a repo.

    • Copies of repositories on your machine are called clones. If you need help cloning to your local environment, you can learn how from the GitHub documentation on cloning a repository.
  2. Go to an exercise directory and open the HTML file in a web browser. You can open the file directly or use something like VSCode's Live Server extension.
  3. For each exercise, read the README thoroughly before starting any work.

    • Each README has a "Self Check" list. Use this to ensure you haven't missed any important details in your implementation.
  4. Make your edits in the index.html and/or the style.css files in order to make the output in your browser look like the Desired Outcome image(s).

    • Depending on the instructions of the exercise, you may only need to make edits in one of these files.
  5. Once you successfully finish an exercise, check TOP's solution to compare it with yours.

    • You should not be checking the solution for an exercise until you finish it!
    • If your solution differs wildly from TOP's solution (and still passes the exercise's requirements), that's completely fine. Do feel free to ask about it in our Discord if there are parts you do not understand.
Important
Do not submit your solutions to this repo, as any PRs that do so will be closed without merging.
Some Hints
  • The official solutions put all changes at the end of the CSS file, which may duplicate some selectors (e.g. there might be a body {} in the given CSS and another body {} in the solution). When you are working on an exercise, it is best practice to add your CSS to existing selectors instead of duplicating them at the end of the file. We're sacrificing this best practice in our official solutions to make it extra clear to you what things we changed to solve the exercise.
  • Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using font: sans-serif bold 16px or that the margin is exactly42px.
  • You may need to add some elements to your HTML to get things into the right spot. (For the first few exercises, we make it explicit when this needs to happen.)
  • You may need to add more selectors to your CSS file. The first few exercises have almost everything already done for you, but as you progress, you'll find that you need to add more and more selectors to get the correct result.
About
No description, website, or topics provided.
Resources
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Activity
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Stars
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0 watching
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0 forks
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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
CSS Exercises
These exercises consist of a series of CSS-related tasks intended to complement the HTML and CSS content on The Odin Project (TOP). They should only be completed when instructed during the course of the curriculum.
When doing these exercises, please use all documentation and resources you need to accomplish them. You are not intended to have any of this stuff memorized at this point. Check the docs, use Google, and do what you need to do (besides checking the solutions) to get them done.
Important
We encourage you to practice your git skills by committing your changes and pushing them to your own fork. However, please DO NOT open a Pull Request to have your solutions merged into this repo or to show your solution. If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.
Contributing
If you have suggestions to improve an exercise, ideas for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our contributing guide.
How To Use These Exercises
  1. Fork and clone this repository. To learn how to fork a repository, see the GitHub documentation on how to fork a repo.

    • Copies of repositories on your machine are called clones. If you need help cloning to your local environment, you can learn how from the GitHub documentation on cloning a repository.
  2. Go to an exercise directory and open the HTML file in a web browser. You can open the file directly or use something like VSCode's Live Server extension.
  3. For each exercise, read the README thoroughly before starting any work.

    • Each README has a "Self Check" list. Use this to ensure you haven't missed any important details in your implementation.
  4. Make your edits in the index.html and/or the style.css files in order to make the output in your browser look like the Desired Outcome image(s).

    • Depending on the instructions of the exercise, you may only need to make edits in one of these files.
  5. Once you successfully finish an exercise, check TOP's solution to compare it with yours.

    • You should not be checking the solution for an exercise until you finish it!
    • If your solution differs wildly from TOP's solution (and still passes the exercise's requirements), that's completely fine. Do feel free to ask about it in our Discord if there are parts you do not understand.
Important
Do not submit your solutions to this repo, as any PRs that do so will be closed without merging.
Some Hints
  • The official solutions put all changes at the end of the CSS file, which may duplicate some selectors (e.g. there might be a body {} in the given CSS and another body {} in the solution). When you are working on an exercise, it is best practice to add your CSS to existing selectors instead of duplicating them at the end of the file. We're sacrificing this best practice in our official solutions to make it extra clear to you what things we changed to solve the exercise.
  • Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using font: sans-serif bold 16px or that the margin is exactly42px.
  • You may need to add some elements to your HTML to get things into the right spot. (For the first few exercises, we make it explicit when this needs to happen.)
  • You may need to add more selectors to your CSS file. The first few exercises have almost everything already done for you, but as you progress, you'll find that you need to add more and more selectors to get the correct result.
About
No description, website, or topics provided.
Resources
Readme
License
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
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, '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
CSS Exercises
These exercises consist of a series of CSS-related tasks intended to complement the HTML and CSS content on The Odin Project (TOP). They should only be completed when instructed during the course of the curriculum.
When doing these exercises, please use all documentation and resources you need to accomplish them. You are not intended to have any of this stuff memorized at this point. Check the docs, use Google, and do what you need to do (besides checking the solutions) to get them done.
Important
We encourage you to practice your git skills by committing your changes and pushing them to your own fork. However, please DO NOT open a Pull Request to have your solutions merged into this repo or to show your solution. If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.
Contributing
If you have suggestions to improve an exercise, ideas for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our contributing guide.
How To Use These Exercises
  1. Fork and clone this repository. To learn how to fork a repository, see the GitHub documentation on how to fork a repo.

    • Copies of repositories on your machine are called clones. If you need help cloning to your local environment, you can learn how from the GitHub documentation on cloning a repository.
  2. Go to an exercise directory and open the HTML file in a web browser. You can open the file directly or use something like VSCode's Live Server extension.
  3. For each exercise, read the README thoroughly before starting any work.

    • Each README has a "Self Check" list. Use this to ensure you haven't missed any important details in your implementation.
  4. Make your edits in the index.html and/or the style.css files in order to make the output in your browser look like the Desired Outcome image(s).

    • Depending on the instructions of the exercise, you may only need to make edits in one of these files.
  5. Once you successfully finish an exercise, check TOP's solution to compare it with yours.

    • You should not be checking the solution for an exercise until you finish it!
    • If your solution differs wildly from TOP's solution (and still passes the exercise's requirements), that's completely fine. Do feel free to ask about it in our Discord if there are parts you do not understand.
Important
Do not submit your solutions to this repo, as any PRs that do so will be closed without merging.
Some Hints
  • The official solutions put all changes at the end of the CSS file, which may duplicate some selectors (e.g. there might be a body {} in the given CSS and another body {} in the solution). When you are working on an exercise, it is best practice to add your CSS to existing selectors instead of duplicating them at the end of the file. We're sacrificing this best practice in our official solutions to make it extra clear to you what things we changed to solve the exercise.
  • Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using font: sans-serif bold 16px or that the margin is exactly42px.
  • You may need to add some elements to your HTML to get things into the right spot. (For the first few exercises, we make it explicit when this needs to happen.)
  • You may need to add more selectors to your CSS file. The first few exercises have almost everything already done for you, but as you progress, you'll find that you need to add more and more selectors to get the correct result.
About
No description, website, or topics provided.
Resources
Readme
License
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
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
CSS Exercises
These exercises consist of a series of CSS-related tasks intended to complement the HTML and CSS content on The Odin Project (TOP). They should only be completed when instructed during the course of the curriculum.
When doing these exercises, please use all documentation and resources you need to accomplish them. You are not intended to have any of this stuff memorized at this point. Check the docs, use Google, and do what you need to do (besides checking the solutions) to get them done.
Important
We encourage you to practice your git skills by committing your changes and pushing them to your own fork. However, please DO NOT open a Pull Request to have your solutions merged into this repo or to show your solution. If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.
Contributing
If you have suggestions to improve an exercise, ideas for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our contributing guide.
How To Use These Exercises
  1. Fork and clone this repository. To learn how to fork a repository, see the GitHub documentation on how to fork a repo.

    • Copies of repositories on your machine are called clones. If you need help cloning to your local environment, you can learn how from the GitHub documentation on cloning a repository.
  2. Go to an exercise directory and open the HTML file in a web browser. You can open the file directly or use something like VSCode's Live Server extension.
  3. For each exercise, read the README thoroughly before starting any work.

    • Each README has a "Self Check" list. Use this to ensure you haven't missed any important details in your implementation.
  4. Make your edits in the index.html and/or the style.css files in order to make the output in your browser look like the Desired Outcome image(s).

    • Depending on the instructions of the exercise, you may only need to make edits in one of these files.
  5. Once you successfully finish an exercise, check TOP's solution to compare it with yours.

    • You should not be checking the solution for an exercise until you finish it!
    • If your solution differs wildly from TOP's solution (and still passes the exercise's requirements), that's completely fine. Do feel free to ask about it in our Discord if there are parts you do not understand.
Important
Do not submit your solutions to this repo, as any PRs that do so will be closed without merging.
Some Hints
  • The official solutions put all changes at the end of the CSS file, which may duplicate some selectors (e.g. there might be a body {} in the given CSS and another body {} in the solution). When you are working on an exercise, it is best practice to add your CSS to existing selectors instead of duplicating them at the end of the file. We're sacrificing this best practice in our official solutions to make it extra clear to you what things we changed to solve the exercise.
  • Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using font: sans-serif bold 16px or that the margin is exactly42px.
  • You may need to add some elements to your HTML to get things into the right spot. (For the first few exercises, we make it explicit when this needs to happen.)
  • You may need to add more selectors to your CSS file. The first few exercises have almost everything already done for you, but as you progress, you'll find that you need to add more and more selectors to get the correct result.
About
No description, website, or topics provided.
Resources
Readme
License
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
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
CSS Exercises
These exercises consist of a series of CSS-related tasks intended to complement the HTML and CSS content on The Odin Project (TOP). They should only be completed when instructed during the course of the curriculum.
When doing these exercises, please use all documentation and resources you need to accomplish them. You are not intended to have any of this stuff memorized at this point. Check the docs, use Google, and do what you need to do (besides checking the solutions) to get them done.
Important
We encourage you to practice your git skills by committing your changes and pushing them to your own fork. However, please DO NOT open a Pull Request to have your solutions merged into this repo or to show your solution. If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.
Contributing
If you have suggestions to improve an exercise, ideas for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our contributing guide.
How To Use These Exercises
  1. Fork and clone this repository. To learn how to fork a repository, see the GitHub documentation on how to fork a repo.

    • Copies of repositories on your machine are called clones. If you need help cloning to your local environment, you can learn how from the GitHub documentation on cloning a repository.
  2. Go to an exercise directory and open the HTML file in a web browser. You can open the file directly or use something like VSCode's Live Server extension.
  3. For each exercise, read the README thoroughly before starting any work.

    • Each README has a "Self Check" list. Use this to ensure you haven't missed any important details in your implementation.
  4. Make your edits in the index.html and/or the style.css files in order to make the output in your browser look like the Desired Outcome image(s).

    • Depending on the instructions of the exercise, you may only need to make edits in one of these files.
  5. Once you successfully finish an exercise, check TOP's solution to compare it with yours.

    • You should not be checking the solution for an exercise until you finish it!
    • If your solution differs wildly from TOP's solution (and still passes the exercise's requirements), that's completely fine. Do feel free to ask about it in our Discord if there are parts you do not understand.
Important
Do not submit your solutions to this repo, as any PRs that do so will be closed without merging.
Some Hints
  • The official solutions put all changes at the end of the CSS file, which may duplicate some selectors (e.g. there might be a body {} in the given CSS and another body {} in the solution). When you are working on an exercise, it is best practice to add your CSS to existing selectors instead of duplicating them at the end of the file. We're sacrificing this best practice in our official solutions to make it extra clear to you what things we changed to solve the exercise.
  • Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using font: sans-serif bold 16px or that the margin is exactly42px.
  • You may need to add some elements to your HTML to get things into the right spot. (For the first few exercises, we make it explicit when this needs to happen.)
  • You may need to add more selectors to your CSS file. The first few exercises have almost everything already done for you, but as you progress, you'll find that you need to add more and more selectors to get the correct result.
About
No description, website, or topics provided.
Resources
Readme
License
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
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('^' + ".*" + '

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CSS Exercises
These exercises consist of a series of CSS-related tasks intended to complement the HTML and CSS content on The Odin Project (TOP). They should only be completed when instructed during the course of the curriculum.
When doing these exercises, please use all documentation and resources you need to accomplish them. You are not intended to have any of this stuff memorized at this point. Check the docs, use Google, and do what you need to do (besides checking the solutions) to get them done.
Important
We encourage you to practice your git skills by committing your changes and pushing them to your own fork. However, please DO NOT open a Pull Request to have your solutions merged into this repo or to show your solution. If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.
Contributing
If you have suggestions to improve an exercise, ideas for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our contributing guide.
How To Use These Exercises
  1. Fork and clone this repository. To learn how to fork a repository, see the GitHub documentation on how to fork a repo.

    • Copies of repositories on your machine are called clones. If you need help cloning to your local environment, you can learn how from the GitHub documentation on cloning a repository.
  2. Go to an exercise directory and open the HTML file in a web browser. You can open the file directly or use something like VSCode's Live Server extension.
  3. For each exercise, read the README thoroughly before starting any work.

    • Each README has a "Self Check" list. Use this to ensure you haven't missed any important details in your implementation.
  4. Make your edits in the index.html and/or the style.css files in order to make the output in your browser look like the Desired Outcome image(s).

    • Depending on the instructions of the exercise, you may only need to make edits in one of these files.
  5. Once you successfully finish an exercise, check TOP's solution to compare it with yours.

    • You should not be checking the solution for an exercise until you finish it!
    • If your solution differs wildly from TOP's solution (and still passes the exercise's requirements), that's completely fine. Do feel free to ask about it in our Discord if there are parts you do not understand.
Important
Do not submit your solutions to this repo, as any PRs that do so will be closed without merging.
Some Hints
  • The official solutions put all changes at the end of the CSS file, which may duplicate some selectors (e.g. there might be a body {} in the given CSS and another body {} in the solution). When you are working on an exercise, it is best practice to add your CSS to existing selectors instead of duplicating them at the end of the file. We're sacrificing this best practice in our official solutions to make it extra clear to you what things we changed to solve the exercise.
  • Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using font: sans-serif bold 16px or that the margin is exactly42px.
  • You may need to add some elements to your HTML to get things into the right spot. (For the first few exercises, we make it explicit when this needs to happen.)
  • You may need to add more selectors to your CSS file. The first few exercises have almost everything already done for you, but as you progress, you'll find that you need to add more and more selectors to get the correct result.
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, '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
CSS Exercises
These exercises consist of a series of CSS-related tasks intended to complement the HTML and CSS content on The Odin Project (TOP). They should only be completed when instructed during the course of the curriculum.
When doing these exercises, please use all documentation and resources you need to accomplish them. You are not intended to have any of this stuff memorized at this point. Check the docs, use Google, and do what you need to do (besides checking the solutions) to get them done.
Important
We encourage you to practice your git skills by committing your changes and pushing them to your own fork. However, please DO NOT open a Pull Request to have your solutions merged into this repo or to show your solution. If we were to merge your changes the exercises would no longer be available as intended for new learners, and opening a PR only causes additional work for us, as we have to close it without merging.
Contributing
If you have suggestions to improve an exercise, ideas for a new exercise, or notice an issue with an exercise, please feel free to open an issue after thoroughly reading our contributing guide.
How To Use These Exercises
  1. Fork and clone this repository. To learn how to fork a repository, see the GitHub documentation on how to fork a repo.

    • Copies of repositories on your machine are called clones. If you need help cloning to your local environment, you can learn how from the GitHub documentation on cloning a repository.
  2. Go to an exercise directory and open the HTML file in a web browser. You can open the file directly or use something like VSCode's Live Server extension.
  3. For each exercise, read the README thoroughly before starting any work.

    • Each README has a "Self Check" list. Use this to ensure you haven't missed any important details in your implementation.
  4. Make your edits in the index.html and/or the style.css files in order to make the output in your browser look like the Desired Outcome image(s).

    • Depending on the instructions of the exercise, you may only need to make edits in one of these files.
  5. Once you successfully finish an exercise, check TOP's solution to compare it with yours.

    • You should not be checking the solution for an exercise until you finish it!
    • If your solution differs wildly from TOP's solution (and still passes the exercise's requirements), that's completely fine. Do feel free to ask about it in our Discord if there are parts you do not understand.
Important
Do not submit your solutions to this repo, as any PRs that do so will be closed without merging.
Some Hints
  • The official solutions put all changes at the end of the CSS file, which may duplicate some selectors (e.g. there might be a body {} in the given CSS and another body {} in the solution). When you are working on an exercise, it is best practice to add your CSS to existing selectors instead of duplicating them at the end of the file. We're sacrificing this best practice in our official solutions to make it extra clear to you what things we changed to solve the exercise.
  • Unless listed in the self-check section, do not worry about getting the exact pixel value for things like margin, padding and font size. These exercises are intended to test your knowledge of CSS, not your ability to guess that a screenshot is using font: sans-serif bold 16px or that the margin is exactly42px.
  • You may need to add some elements to your HTML to get things into the right spot. (For the first few exercises, we make it explicit when this needs to happen.)
  • You may need to add more selectors to your CSS file. The first few exercises have almost everything already done for you, but as you progress, you'll find that you need to add more and more selectors to get the correct result.
About
No description, website, or topics provided.
Resources
Readme
License
Activity
Custom properties
Stars
0 stars
Watchers
0 watching
Forks
0 forks
Report repository
Releases
Packages
Contributors
Languages