border-top-width

The border-top-width property sets the width of the top border.

Formal Syntax

<line-width>

Initial value

medium

Applies to

all elements except ruby base containers and ruby annotation containers

Inherited

no

Percentages

N/A

Computed value

absolute length, snapped as a border width

Animation type

by computed value

See specification

JavaScript Access

// Access via element.style
element.style.borderTopWidth = 'medium';

Logical Property Group

This property belongs to the border-width logical property group, which includes:

• border-block-end-width
• border-block-start-width
• border-bottom-width
• border-inline-end-width
• border-inline-start-width
• border-left-width
• border-right-width
• border-top-width (current property)