What is an event in javascript

The behaviors that can be detected in JavaScript are events, and through JavaScript code, HTML allows you to add event handlers to HTML elements.

The operating environment of this article: windows7 system, javascript version 1.8.5, DELL G3 computer

What is an event in javascript?

JavaScript Events

HTML events are “things” that happen on HTML elements.

When JavaScript is used in an HTML page, JavaScript can "cope" with these events.

HTML Events

HTML events can be something the browser or the user does.

Here are some examples of HTML events:

HTML 网页完成加载
HTML 输入字段被修改
HTML 按钮被点击

Usually, when an event occurs, the user will want to do something.

JavaScript allows you to execute code when an event is detected.

HTML allows you to add event handlers to HTML elements through JavaScript code.

Use single quotes:

<element event=&#39;一些 JavaScript&#39;>

Use double quotes:

<element event="一些 JavaScript">

In the following example, the onclick attribute (and code) is added to the element:

Example

<button onclick=&#39;document.getElementById("demo").innerHTML=Date()&#39;>现在的时间是？</button>

In the above example, the JavaScript code changes the content of the element with id="demo".

Recommended study: "javascript basic tutorial"

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