What is the default width of `` margins?

Question

What is the default margin that HTML sets for its tags? I noticed there is some auto margin, but I was wondering if anyone knows what it is (and if it's in px or % etc.).

P粉573809727 · Answer

According to W3School’s CSS reference, The default attributes and values of the body tag are,

body{ display : block; margin : 8px; }

By accessing the Calculation Pane in Chrome Dev Tools.

P粉864594965 · Answer

In most major browsers, the default margins on all sides are 8px. It is defined in pixels by the user-agent-stylesheet provided by the browser.

Some browsers allow you to create and use your own user-agent-stylesheet, but if you are developing a website I recommend not changing this as your users most likely won't Make a modified stylesheet and you'll see a different page than you did.

If you want to change it, you can do this:

body {
  margin: 0px;
  padding: 0px;
  ...
}

But if you have a large project and want to be more complete, use normalize.css. It resets many default values to be consistent across browsers.

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