html codepen code example
Example 1: codepen
CODE PEN IS AN ONLINE HTML,CSS,JAVASCRIPT EDITOR . THE CODES ARE CALLED AS PENS
Example 2: codepen
shortcuts
https://codepen.io/basilbeltran/pen/abZejPo
https://blog.codepen.io/documentation/key-bindings/
https://codemirror.net/keymap/vim.js