CodePen is a popular online code editor used by many developers around the world . It is also one of the recommended editors you can use for the freeCodeCamp curriculum. CodePen is only for frontend projects and supports HTML, CSS, and JavaScript.
Read moreHow do I enable React in CodePen?
Codepen: Add React and Babel to a Template Pen First, create a New Pen. You’ll find a button on your Profile page. Otherwise, click your Profile image in the top-right corner of any view to bring up the dropdown menu. Configuring your new Pen to understand React.21 Tem 2016
Read more