CodeMirror for Post Editor vs CodePen Embed Block

This plugin adds an editor button that will let you use the great CodeMirror editor to edit the HTML code of your posts. This editor supports code coloring and automatic tag closing on a big editor that will let you write beautiful code on your WordPress posts. Probably the best choice if you need to use complex HTML on your posts, or just enjoy writing in plain HTML.

CodePen is an online code editor for front-end development. You build things (we call them Pens) with HTML, CSS, and JavaScript, and the languages and libraries that go along with those. Any Pen can be embedded on another site, making them useful for blog posts, documentation, forums, etc. This block makes it easy to embed them. While oEmbed (just paste in a Pen URL!) also works for CodePen embeds in the block editor, this plugin allows for much more control, like setting the the height, theme, and default tabs.