https://prismjs.com/

• syntaxhighlighter
• javascript

https://microsoft.github.io/monaco-editor/

• code
• editor
• javascript
• syntaxhighlighter
• VSCode

http://ace.ajax.org/

• javascript
• editor
• syntaxhighlighter

http://marijn.haverbeke.nl/codemirror/

• codemirror
• syntaxhighlighter
• textarea
• parser
• code
• html
• css
• javascript
• js