“*"是什么意思?在 CSS 中是什么意思?

2022-01-10 00:00:00 css-selectors css

我一直在查看 Facebook 和 Youtube 等许多网站的 CSS 文件.

I have been looking at the CSS files for many websites like Facebook and Youtube.

在几乎所有的代码中,我都看到了这段代码:

In almost all of them I see this code:

* {
margin: 0;
padding: 0;
}

这很奇怪,因为在 chrome web 开发人员工具中删除该块不会影响页面的布局.

It is odd, as removing that block in chrome web developer tools doesn't affect the layout of the page.

这段代码是什么意思,什么时候使用,为什么使用?

What does this code mean, and when is it used and why?

推荐答案

这是一种称为 CSS 重置的常用技术.不同的浏览器使用不同的默认边距,导致站点看起来不同的边距.* 表示所有元素"(一个 通用选择器),所以我们设置所有元素都具有零边距和零填充,从而使它们在所有浏览器中看起来都一样.

This is a common technique called a CSS reset. Different browsers use different default margins, causing sites to look different by margins. The * means "all elements" (a universal selector), so we are setting all elements to have zero margins, and zero padding, thus making them look the same in all browsers.

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