How to Remove Extra Space Above an HTML Header?

Removing Margin Around an HTML Header

When displaying a header element, some users encounter unnecessary space above it. To address this issue, we can leverage the following CSS code:

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

header {
  margin: 0px;
  padding: 0px;
  height: 20em;
  background-color: #C0C0C0;
}

h1 {
  margin-top: 0;
}

This adjustment targets the

element specifically, setting its top margin to 0 to eliminate the unwanted spacing.

The initial issue stemmed from a phenomenon known as margin collapsing. In CSS, when two elements with margins overlap, the resulting margin is equal to the larger of the two margins. This means that in the provided HTML and CSS code, the margin around the header element was collapsing with the margin around the

element, resulting in the extra space above the header. By setting the margin-top of the

element to 0, we effectively disable margin collapsing and eliminate the unwanted space.

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