The first summary of common css attributes: id and class selectors

Speaking of selectors, everyone is familiar with them. It is estimated that the most commonly used ones are the id selector and the class selector. As for other selectors, I will avoid talking about them here today.

Class selector: Give the html element a loud name and mark it with class, then you can use the class selector, such as

It is paragraph 1

. Here I set the p element class
to "p1", and then write the css style to use it directly,

For example:

This paragraph will also be center-aligned.

Run the previous code to change the p element with the class name p1 The text color of is set to red. Isn’t it very simple? Please explain that there is no effect when the class name of the non-p element is p1. If you want all
elements with the class name p1 to have To achieve the desired effect, you need to remove the previous structural element name. Today's projects are all agile development, so you have to be careful when using class names. At the beginning, people often complained about class name conflicts. The result was conflicting styles, so we decided on the project According to the convention, class names are named according to page functions to avoid class name conflicts.
Another thing to mention is the multi-class name: such as the above

##

This paragraph will also be center-aligned.

##a class There can be a list in the value, with each word separated by a space. Then just write the styles one by one and it will be ok. Someone here may ask: What will happen if there are

identical css styles between multiple classes! Here you will read the following issues about css cascading! That’s it for today’s article. The first time I wrote it, I may be incoherent. I may just write whatever comes to mind. I look forward to improving it gradually in the future!

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