What is the use of class selector in css

The purpose of the class selector in CSS is to allow styles to be specified in a way that is independent of document elements. Class selectors can be used alone or in combination with other elements. Before using class selectors, specific document markup needs to be modified so that class selectors work properly.

The role of css class selectors: allows styles to be specified in a way that is independent of document elements.

This selector can be used alone or in combination with other elements.

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Note: These selectors can only be used after the document is appropriately marked, so using these two selectors is usually It takes some thinking and planning first.

To apply styles regardless of the specific design element, the most common way is to use a class selector.

Example:

Modify HTML code

Before using the class selector, you need to modify the specific document tag so that the class selector can work properly.

In order to associate the style of a class selector with an element, class must be specified as an appropriate value. Please look at the following HTML code:

<h1 class="important">
This heading is very important.
</h1>

<p class="important">
This paragraph is very important.
</p>

In the above code, the class of two elements is specified as important: the first title (h1 element), and the second paragraph (p element).

Syntax:

Then we use the following syntax to apply styles to these classified elements, that is, there is a period (.) before the class name, and then combined with the wildcard selector:

*.important {color:red;}

If you only want to select all elements with the same class name, you can ignore the wildcard selector in the class selector, which does not have any bad effects:

.important {color:red;}

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