Learn CODEPEN with Real Code Examples

Create a responsive webpage layout

Build interactive buttons and forms

Animate elements using CSS and JavaScript

Integrate third-party libraries like jQuery or GSAP

Develop small front-end games or visual demos

Check browser console for JavaScript errors

Ensure external libraries are loaded correctly

Verify HTML and CSS syntax

Test responsiveness in different viewport sizes

Use CodePen’s documentation and community tips

Run code in preview pane to see immediate effects

Check console for errors and warnings

Test on different browsers and screen sizes

Validate external libraries load correctly

Iterate changes and save frequently

Share project via CodePen URL

Embed Pens in websites or blogs

Export Project files for local hosting

Use CodePen Projects for multi-file deployment (Pro)

Integrate with GitHub Pages or other hosting solutions

Code editor panels for HTML, CSS, JS

Live preview rendering

Settings panel for external resources

Community gallery for sharing and discovery

Asset hosting for images and fonts

CDN libraries like jQuery, Bootstrap, React

Preprocessors (Sass, SCSS, LESS, TypeScript)

Embedding in blogs, documentation, or websites

Export to GitHub or local files

Third-party tools for collaboration (Pro feature)

Use templates to quickly start a project

Leverage external libraries for efficiency

Fork existing Pens for faster experimentation

Save frequently and organize Projects

Participate in challenges to improve skills

Debugging cross-browser layout issues

Managing complex JavaScript interactions

Optimizing performance for large Pens

Working with multiple libraries and dependencies

Showcasing work effectively in the community