Those who have used AngularJS should be most interested in its commands. Currently, only AngularJS supports custom commands, and AngularJS is the only framework that provides reusable Web applications. Currently, many JavaScript products provide plug-ins to Web developers. For example, Bootstrap is a popular front-end development toolkit that provides styles and JavaScript plug-ins. When using the boins in Booostrap, developers must switch to the JavaScript mode to write jQuery code to activate the ins. Although jQuery code is easy to write, it must be synchronized with HTML, this is a tedious and error-prone process. The AngularJS home page shows a simple example for implementing the Tab function in Bootstrap. You can easily add the Tab function on the page, and the usage is as simple as ul labels. The HTML code is as follows: copy the Code <body ng-app = "components">