迹忆客 专注技术分享

当前位置:主页 > 学无止境 > WEB前端 > Angular >

AngularJS 中的 Ng-Keypress

作者:迹忆客 最近更新:2023/03/13 浏览次数:

我们将通过示例在 AngularJS 中介绍 ng-keypress

在 AngularJS 中使用 ng-keypress

在处理 AngularJS 应用程序时,有很多情况下我们需要在按键上分配行为。要在按键上应用自定义行为,我们必须在 AngularJS 中使用 ng-keypress 指令。

AngularJS 的 ng-keypress 指令不会取代按键场合特有的组件; 两者都将被执行。这由 <input><select><textarea> 元素支持。

语法:

<input ng-keypress="behavior">

"behavior" 将决定当按键被按下时要做什么。

让我们举个例子并使用这个 ng-keypress 指令。首先,我们将在 index.html 中创建视图。

代码 - index.html

<!DOCTYPE html>
<html>

<head>
    <title>ng-keypress Directive By Rana Hasnain</title>

    <script src=
"https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js">
    </script>

    <script type="text/javascript" src="app.js"></script>
</head>

<body style="text-align:center">
    <div ng-app="ngApp" ng-controller="ngController">
        <h1 style="color:Blue">
            jiyik.com
        </h1>

        Enter Name: <input type="text"
                ng-keypress="getKeyVal($event)" >

        <br><br>

        <span style="color:green;">
            Code of Key Is: {{valKey}}
        </span>
    </div>
</body>
</html>

接下来,我们创建一个函数来获取 app.js 中的键值。

代码 - app.js

var app = angular.module('ngApp', []);
        app.controller('ngController', function ($scope) {
            $scope.getKeyVal = function (event) {
                $scope.valKey = event.keyCode;
            }
        });

输出:

转载请发邮件至 1244347461@qq.com 进行申请,经作者同意之后,转载请以链接形式注明出处

本文地址:

相关文章

Do you understand JavaScript closures?

发布时间:2025/02/21 浏览次数:108 分类:JavaScript

The function of a closure can be inferred from its name, suggesting that it is related to the concept of scope. A closure itself is a core concept in JavaScript, and being a core concept, it is naturally also a difficult one.

Do you know about the hidden traps in variables in JavaScript?

发布时间:2025/02/21 浏览次数:178 分类:JavaScript

Whether you're just starting to learn JavaScript or have been using it for a long time, I believe you'll encounter some traps related to JavaScript variable scope. The goal is to identify these traps before you fall into them, in order to av

How much do you know about the Prototype Chain?

发布时间:2025/02/21 浏览次数:150 分类:JavaScript

The prototype chain can be considered one of the core features of JavaScript, and certainly one of its more challenging aspects. If you've learned other object-oriented programming languages, you may find it somewhat confusing when you start

用 jQuery 检查复选框是否被选中

发布时间:2024/03/24 浏览次数:102 分类:JavaScript

在本教程中学习 jQuery 检查复选框是否被选中的所有很酷的方法。我们展示了使用直接 DOM 操作、提取 JavaScript 属性的 jQuery 方法以及使用 jQuery 选择器的不同方法。你还将找到许多有用的

扫一扫阅读全部技术教程

社交账号
  • https://www.github.com/onmpw
  • qq:1244347461

最新推荐

教程更新

热门标签

扫码一下
查看教程更方便