Explain AngularJS boot process or How AngularJS is initialized automatically

Angular initializes automatically upon DOMContentLoaded event or when the angular.js script is downloaded to the browser . At this point AngularJS looks for the ng-app directive which is the root of angular app.

When the ng-app directive is found then Angular will:

• Load the module associated with the directive.
• Create the application injector.
• Compile the DOM starting from the ng-app root element.

This process is called auto-bootstrapping.