What is causing the top margin on my body in CSS and HTML5?

I'm having trouble understanding something. I have …

body, html {
    height:100%;
    margin:0;
    padding:0;
}

Even though the content is not as tall as the window, my browser always shows a vertical scrollbar.

In this screenshot below, you can see that there's a small gap at the top when I inspect the body. The html element doesn't have this gap.

Any thoughts on what might be causing this issue?

Answer №1

It is possible that there is an element within the body tag with a margin-top property causing spacing issues.

For more information, you can refer to this resource on collapsing margins.

To confirm this issue, try adding padding: 1px to the body element as a simple test. If the gap disappears, then I may be correct in my assumption.

Answer №2

Joining the conversation a bit late, but I wanted to share some insights...

If your website runs on WordPress, there's a high chance that WordPress is inserting the following code:

 html { margin-top: 32px !important; }

This adjustment is made to create space for the admin bar, which seems to be missing for some reason.

To fix this issue, simply add the following snippet to your theme's functions.php file:

add_filter('show_admin_bar', '__return_false');

Answer №3

My experience was quite unique as the issue stemmed from accidentally adding semicolons in the header, which were somehow showing up in the body of the webpage but hidden by other elements and styles. Despite not having any margin or padding at the top, extra text appeared as the first child of the body, causing confusion.

Even though the unwanted text didn't match exactly what I needed to remove, it was evident that there was an abnormal amount of white space present. This unexpected behavior made troubleshooting difficult, especially when using an HTML templating engine like Razor.

Answer №4

attempt

body {
  margin: 0;
  padding: 0;
}

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