How to use div id class? Detailed explanation of the differences between div id class

The content of this article is about how to use div id class? A detailed explanation of the differences between div id class and div class has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

like:

<p id="header"></p> <p class="abc"></p>

Similar to this, use id and class in the p tag to call the corresponding CSS style.

What is the difference between p’s ID attribute and CLASS attribute?

1. Grammar difference ​ The id corresponding to css uses the style selector "#" (pound sign); Class corresponding to css is to use the style selector "." (English half-width input period)

<p id="header"></p> <p class="abc"></p>

The corresponding CSS should be:

#header{...} .abc{...} /* css注释说明：这里以省略号替代CSS样式内容 */

2. Differences in usage regulations ​ The id attribute can only be called by one element (the CSS style named with the "#" selector can only be called once on a page)

The class tag can be used to be called by multiple elements (styles named with the "." selector can be used multiple times on one page)

id: It can only be called once on the same page and is represented by "#" in CSS.

class: It is a class tag that can be called countless times (without limit) on the same page. It is represented by "." in CSS.

ID is like a person's ID card, used to identify the p. Class is like the clothes worn by the person, used to define the style of the p. Generally, a web page does not have two or more p's with the same ID, but multiple p's can use the same Class.

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