how to add Intellisense to Visual Studio Code for bootstrap

Question

You can install HTML CSS Support Extension.

ext install vscode-html-css

This will add Intellisense in your HTML files:

Bootstrap Intellisense

You don’t need to configure anything for local files, just close and reopen vscode after installing. For remote css files, you can add the following

"css.styleSheets": [
  "https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css"
]

in the settings.json