AngularJS ng-keydown directive
AngularJS instance
Code executed when the key is pressed:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="/libs//1.4.6/"></script>
</head>
<body ng-app="">
<input ng-keydown="count = count + 1" ng-init="count=0" />
<h1>{{count}}</h1>
<p>This instance is pressed every time the key is pressed in the input box，Calculate variables "count" Will automatically add 1。</p>
</body>
</html>
Definition and usage
ng-keydown Directives are used to tell AngularJS what actions are required when pressing a key on a specified HTML element.
ng-keydown Directives will not overwrite the element's native onkeydown event. When the event is triggered, both the ng-keydown expression and the native onkeydown event will be executed.
The sequence of events of keystrokes:
grammar
<element ng-keydown="expression"></element>
<input>, <select>, <textarea>, and other editable elements support this directive.
Parameter value
| value | describe |
|---|---|
| expression | The expression executed by pressing the key. |