border-top-width property - Script Tutorials

Contents

Definition and Usage
Syntax
Values
Examples
Compatibility
Desktop browsers
Mobile browsers

Definition and Usage

The border-top-width CSS property sets the width of the top border of a box.

Initialmedium
Applies toall elements
Inheritedno
Mediavisual
Computed Valuethe absolute length or 0 if border-top-style is none or hidden
Animatableyes, as a length
Canonical orderthe unique non-ambiguous order defined by the formal grammar

Syntax

Formal syntax: <br-width>

border-top-width: 10em    /* Any <length> value */
border-top-width: 3vmax
border-top-width: 6px
border-top-width: thin    /* A keyword */
border-top-width: medium
border-top-width: thick
border-top-width: inherit

Values

<br-width>

Is either a non-negative explicit <length> value or a keyword denoting the thickness of the bottom border. The keyword must be one of the following values:

Style	Preview	Description
`thin`		A thin border
`medium`		A medium border
`thick`		A thick border

The specification doesn’t precisely define the thickness of each of the keywords, which is therefore implementation specific. Nevertheless, it requests that the thickness does follow the thin ≤ medium ≤ thick inequality and that the values are constant on a single document.

inherit

Represents the calculated value of the border-top-width of the parent’s element.

Examples

element { 
  
    border-top-width: thin; 
  
    border-top-style: solid; 
  
    border-top-color: #000; 
  
}

.element1{ 
  
        border-top: thick solid red; 
  
} 
  
.element2{ 
  
        border-top: medium solid orange; 
  
} 
  
.element3{ 
  
        border-top: thin solid green; 
  
}