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!DOCTYPE html
<html>
<head>
<meta charset="utf-8">
<script src="https://cdn.staticfile.org/angular.js/1.4.6/angular.min.js"></script>
</head>
<body ng-app="">
<input ng-focus="count = count + 1" ng-init="count=0" />
<h1>{{count}}</h1>
<p>This example calculates the variable "count" automatically and increments it every time the input box gets focused. 1。</p>
</body>
</html>Test to see ‹/›ng-focus The directive is used to tell AngularJS what operation needs to be executed when the HTML element gets focused.
ng-focus The directive does not override the original onfocus event of the element, when the event is triggered,ng-focus Both the expression and the original onfocus event will be executed.
<element ng-focus="expression"></element>
<a>, <input>, <select>, <textarea>, and window objects all support this directive.
| Value | Description |
|---|---|
| expression | Expression to be executed when the element gets focused. |