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In AngularJS, templates are written with HTML that contains AngularJS-specific elements and attributes. AngularJS combines the template with information from the model and controller to render the dynamic view that a user sees in the browser.

These are the types of AngularJS elements and attributes you can use:

  • Directive — An attribute or element that augments an existing DOM element or represents a reusable DOM component.
  • Markup — The double curly brace notation {{ }} to bind expressions to elements is built-in AngularJS markup.
  • Filter — Formats data for display.
  • Form controls — Validates user input.

The following code snippet shows a template with directives and curly-brace expression bindings:

<html ng-app>
 <!-- Body tag augmented with ngController directive  -->
 <body ng-controller="MyController">
   <input ng-model="foo" value="bar">
   <!-- Button tag with ngClick directive, and
          string expression 'buttonText'
          wrapped in "{{ }}" markup -->
   <button ng-click="changeFoo()">{{buttonText}}</button>
   <script src="angular.js"></script>
 </body>
</html>

In a simple app, the template consists of HTML, CSS, and AngularJS directives contained in just one HTML file (usually index.html).

In a more complex app, you can display multiple views within one main page using "partials" – segments of template located in separate HTML files. You can use the ngView directive to load partials based on configuration passed to the $route service. The AngularJS tutorial shows this technique in steps seven and eight.

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https://code.angularjs.org/1.8.2/docs/guide/templates