CSS | border-block-start Property

The border-block-start property in CSS is used to define the individual logical block-start border property values in a single place in the style sheet. This property place the border at the top of the defining element.

Syntax:

border-block-start: border-width|border-style|border-color;

Property values:

  • border-width: This property value holds the width of the property.
  • border-style: This property holds the border style that can be dashed, solid, etc.
  • border-color: This property holds the color of the border.

Below examples illustrate the border-block-start property in the CSS:

Example 1:



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<!DOCTYPE html>
<html>
   
<head>
    <title>CSS | border-block-start Property</title>
    <style>
        h1 {
            color: green;
        }
           
        div {
            background-color: yellow;
            width: 220px;
            height: 40px;
        }
        .one {
            border-block-start: 5px solid yellow;
            background-color: purple;
        }
    </style>
</head>
   
<body>
    <center>
        <h1>Geeksforgeeks</h1>
        <b>CSS | border-block-start Property</b>
        <br><br>
        <div class="one">A Computer Science Portal</div>
    </center>
</body>
   
</html>

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Output:

Example 2:

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<!DOCTYPE html>
<html>
   
<head>
    <title>CSS | border-block-start Property</title>
    <style>
        h1 {
            color: green;
        }
           
        div {
            background-color: yellow;
            width: 220px;
            height: 40px;
        }
        .one {
            border-block-start: medium dashed yellow;
            background-color: purple;
        }
    </style>
</head>
   
<body>
    <center>
        <h1>Geeksforgeeks</h1>
        <b>CSS | border-block-start Property</b>
        <br><br>
        <div class="one">A Computer Science Portal</div>
    </center>
</body>
   
</html>

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Output:

Supported Browsers: The browsers supported by border-block-start property are listed below:

  • Firefox
  • Opera
  • Edge



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