1. HTML is the carrier of web content . Content is the information that web page creators put on the page for users to browse, and can include text, pictures, videos, etc.
2. CSS style is performance . It's like a coat for a web page. For example, title font, color changes, or adding background images, borders, etc. to the title. All these things used to change the appearance of content are called presentations.
3. JavaScript is used to implement special effects on web pages . For example: the drop-down menu pops up when the mouse slides over it. Or the background color of the table changes when the mouse rolls over it. There is also a rotation of hot news (news pictures). It can be understood that animation and interaction are generally implemented using JavaScript.
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