AngularJS takes a different approach. Instead of merging data into a template and replacing a DOM element, AngularJS creates live templates as a view. Individual components of the views are dynamically interpolated live. This feature is arguably one of the most important in AngularJS and allows us to write the hello world app we just wrote in only 10 lines of code without a single line of JavaScript.
This feature works by simply including angular.js in our HTML and explicitly setting the ng-app attribute on an element in the DOM. The ng-app attribute declares that everything inside of it belongs to this Angular app; that’s how we can nest an Angular app inside of a web app. The only components that will be affected by Angular are the DOM elements that we declare inside of the one with the ng-app attribute.
This feature works by simply including angular.js in our HTML and explicitly setting the ng-app attribute on an element in the DOM. The ng-app attribute declares that everything inside of it belongs to this Angular app; that’s how we can nest an Angular app inside of a web app. The only components that will be affected by Angular are the DOM elements that we declare inside of the one with the ng-app attribute.
AngularJS 'Hello world' example
<!DOCTYPE html>
<html ng-app>
<head>
<title>Simple app</title>
<script
src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.js">
</script>
</head>
<body>
<input ng-model="name" type="text" placeholder="Your name">
<h1>Hello {{ name }}</h1>
</body>
</html>
<html ng-app>
<head>
<title>Simple app</title>
<script
src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.6/angular.js">
</script>
</head>
<body>
<input ng-model="name" type="text" placeholder="Your name">
<h1>Hello {{ name }}</h1>
</body>
</html>
