How HTML calls JS
HTML (Hypertext Markup Language) and JS (JavaScript) are the two most basic and important technologies in Web development. HTML is mainly responsible for the structure and layout of web pages, while JS is mainly responsible for the functionality and interaction of web pages. In web development, we often need to let HTML call JS to implement various functions of web pages, such as form validation, dynamic loading of content, etc. This article will introduce how HTML calls JS methods.
Three ways to call JS in HTML
There are three main ways to call JS in HTML: inline, internal and external.
- Inline
Inline is to embed JS code directly into HTML tags, for example:
<button onclick="alert('你点击了按钮')">点击我</button>When this button is clicked, A prompt box will pop up because the onclick attribute executes an embedded JS code. Although this method is simple, it is not conducive to maintenance and management. When the amount of code is large, it will become very cumbersome.
- Internal style
Internal style is to write JS code in the tag or of the HTML document
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