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This article mainly explains "what is an event in javascript". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "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.

This article operating environment: windows7 system, javascript1.8.5 version, DELL G3 computer

What is an event in javascript?

JavaScript event

The HTML event is a "thing" that occurs on the HTML element.

When using JavaScript in a HTML page, JavaScript can "handle" these events.

HTML event

The HTML event can be something that the browser or the user does.

Here are some examples of HTML events:

HTML web page finishes loading HTML input field is modified HTML button is clicked

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

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

Through the JavaScript code, HTML allows you to add event handlers to the HTML element.

Use single quotation marks:

Use double quotation marks:

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

Example

What's the time now?

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

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