Angularjs ng-keypress Instruction
Angularjs instance
Code to execute when the key is pressed:
<! DOCTYPE html>
<html>
<head>
<meta charset = "utf-8">
<script src = "http://apps.bdimg.com/libs/angular.js/1.4.6/angular.min.js"> </ script>
</ head>
<body ng-app = "">
<input ng-keypress = "count = count + 1" ng-init = "count = 0" />
<h1> {{count}} </ h1>
<p> In this example, every time the button is pressed in the input box, the calculation variable "count" will automatically increase by 1. </ p>
</ body>
</ html>
Definitions and usage
The ng-keypress directive is used to tell angularjs what action is required to press a key on the specified HTML element.
The ng-keypress directive does not overwrite the native onkeypress event of the element, and the ng-keypress expression and the native onkeypress event are executed when the event is triggered.
Sequence of events for keystroke strokes:
1.Keydown
2.Keypress
3.Keyup
Grammar
<element ng-keypress= "expression" ></element>
<input>, <select>, <textarea>, and other editable elements support the directive.
Parameter values
| value | Description |
|---|---|
| Expression | An expression that is executed by pressing the key. |
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