What does & mean in css

Let’s first look at a piece of css source code:

ul{
    margin-bottom: 20px;
    & >li {
        margin-bottom: 0;
    }
  }

(Video tutorial recommendation: css video tutorial)

& represents the previous level of nesting.

This is the syntax of sass, which represents the upper-level selector.

The above source code is equivalent to the following code:

ul{margin-bottom: 20px;}
ul > li {margin-bottom: 0;}

Recommended tutorial: css quick start

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