What to put in CSS?

CSS is the abbreviation of Cascading Style Sheets. The Chinese translation is Cascading Style Sheets. It is a language used to describe document styles such as HTML (Hypertext Markup Language) or XML (Extensible Markup Language). It can Help users create a variety of different visual effects and make the website more beautiful and easy to read. However, in actual use, many developers will encounter a problem - where should CSS be placed?

There are three placement locations for CSS:

1. Inline style: Write the CSS code directly into the style attribute of the HTML tag. For example, to set the h1 tag color to red, you can write:

This is a first-level title

The advantage of using inline styles is that they take effect directly and are simple and easy to use, but they will increase a lot of HTML code and are difficult to maintain and modify.

2. Internal style sheet: Use the