Directly using the element selector to define em has the same function as the descendant selector
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Yes. However, sometimes, we will choose to use the descendant selector instead of the element selector. For example, let me write a piece of code for you. In the following code, I want to modify the font color of the first em:
<div><em>我是程序界的彭于晏</em></div> <span><em>我是程序界的周杰倫</em></span>
If the element selector is used directly here, the color of the two sentences in em will be changed, but I only want to change the words in the first em, then at this time, the descendant selector will show its effect.
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