Style borderWidth Property

Definition and Usage

borderWidth This property sets or returns the width of the element's border.

This property can take one to four values:

  • A value, for example: p {border-width: thick} - All four borders are thick
  • Two values, for example: p {border-width: thick thin} - The top and bottom borders are thick, and the left and right borders are thin
  • Three values, for example: p {border-width: thick thin medium} - The top border is thick, the left and right borders are thin, and the bottom border is medium
  • Four values, for example: p {border-width: thick thin medium 10px} - The top border is thick, the right border is thin, the bottom border is medium, and the left border is 10px

See also:

CSS Tutorial:CSS Borders

CSS Reference Manual:border-width property

HTML DOM Reference Manual:border property

Instance

Example 1

Changes the width of the four borders of the <div> element:

document.getElementById("myDiv").style.borderWidth = "thick";

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Example 2

Changes the top and bottom border widths of the <div> element to thick and the left and right border widths to thin:

document.getElementById("myDiv").style.borderWidth = "thick thin";

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Example 3

Use length values to change the width of the four borders of the <div> element:

document.getElementById("myDiv").style.borderWidth = "1px 5px 10px 20px";

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Example 4

Returns the border width of the <div> element:

alert(document.getElementById("myDiv").style.borderWidth);

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Syntax

Return borderWidth property:

object.style.borderWidth

Set borderWidth property:

object.style.borderWidth = "thin|medium|thick|length|initial|inherit"
Value Description
thin Defines thin borders.
medium Defines medium borders. Default.
thick Defines thick borders.
length Border width measured in length.
initial Sets this property to its default value. See initial.
inherit Inherits this property from its parent element. See inherit.

Technical Details

Default value: medium
Return value: A string that represents the width of the element's border.
CSS Version: CSS1

Browser Support

Chrome Edge Firefox Safari Opera
Chrome Edge Firefox Safari Opera
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