The difference between an IMG tag and a CSS Background-image

In the course of Web page loading,

A picture that exists with a CSS background background-image will wait until the structure is loaded (the contents of the page are all displayed) before it starts to load.

The tag img in HTML is a part of the structure (content) of the page that is loaded in the process of loading the structure.

In other words,

The page will load the contents of the tag img First,

Reload the background image background-image.

If you introduce a large picture, the contents of the IMG will not be displayed until the image is downloaded.

And if you use CSS to introduce the same image, the structure of the Web page and the content is loaded, the background image will not be loaded, and it won't affect the content of your Web browsing.

The difference between an IMG tag and a CSS Background-image