Why There Is A Blank Line At The Top Of The Page?

December 27, 2023 Post a Comment

I've just learning HTML/CSS for a few days and I'm having trouble with this: Why there is a blank line at the top of the page? Can someone tell me what was wrong or missing from m

Solution 1:

This occurs because of parent and first childmargin collapsing between the h1 and the margin of its parent element(s)

One solution would be to add border: 1px solid lightgray or add padding, or you can reset the margin itself to zero - see demo below:

body {
  margin: 0;
  padding: 0;
}

header {
  text-align: center;
  background-color: lightgray;
  border: 1px solid lightgray;
}

headerh1 {
  font-size: 70px;
}

ul {
  background-color: gray;
  padding: 10px;
}

li {
  display: inline;
  margin: 05px05px;
}

a {
  color: white;
  text-decoration: none;
  text-transform: uppercase;
  font-size: 18px;
}

<header><h1>My Website</h1><p>A sample website</p><ul><li><ahref="#">HOMEPAGE</a></li><li><ahref="#">ABOUT ME</a></li><li><ahref="#">CONTACT</a></li></ul></header>

Solution 2:

It's because your h1 has margins. To solve the issue, you need to reset h1's margin-top like this:

h1 {
  margin-top: 0;
}

And here is the working snippet:

<htmllang="en"><head><metacharset="UTF-8"><title>Document</title><style>body{
        margin: 0;
        padding: 0;
    }

    header{
        text-align: center;
        background-color: lightgray;
    }

    headerh1{
        font-size: 70px;
        margin-top: 0;
    }

    ul{
        background-color: gray;
        padding: 10px;
    }

    li{
        display: inline;
        margin: 05px05px;
    }

    a{
        color: white;
        text-decoration: none;
        text-transform: uppercase;
        font-size: 18px;
    }
</style><body><header><h1>My Website</h1><p>A sample website</p><ul><li><ahref="#">HOMEPAGE</a></li><li><ahref="#">ABOUT ME</a></li><li><ahref="#">CONTACT</a></li></ul></header></body>

Solution 3:

The above blank line is caused by the browsers default css style.

Use normalize.css to reset the CSS applied by all the browser to a common one. So that you have level playgroud to apply styles.

https://github.com/necolas/normalize.css/

Solution 4:

To solve this issue you can add margin-top:-45px; in header class.

<!DOCTYPE html><htmllang="en"><head><metacharset="UTF-8"><title>Document</title><style>body {
      margin: 0;
      padding: 0;
    }
    
    header {
      text-align: center;
      margin-top:-45px;
      background-color: lightgray;
    }
    
    headerh1 {
      font-size: 70px;
    }
    
    ul {
      background-color: gray;
      padding: 10px;
    }
    
    li {
      display: inline;
      margin: 05px05px;
    }
    
    a {
      color: white;
      text-decoration: none;
      text-transform: uppercase;
      font-size: 18px;
    }
  </style></head><body><header><h1>My Website</h1><p>A sample website</p><ul><li><ahref="#">HOMEPAGE</a></li><li><ahref="#">ABOUT ME</a></li><li><ahref="#">CONTACT</a></li></ul></header></body></html>

Solution 5:

It is margin of tag h1 make it zero in css.

headerh1{
margin: 0px;
}

Code Html5