width
Quick Summary for width
width
CSS property sets an element's width. By default, it sets the width of the content area, but if box-sizing
is set to border-box
, it sets the width of the border area.
Code Usage for width
/* <length> values */ width: 300px; width: 25em; /* <percentage> value */ width: 75%; /* Keyword values */ width: max-content; width: min-content; width: fit-content(20em); width: auto; /* Global values */ width: inherit; width: initial; width: revert; width: unset;
More Details for width
width
The width
CSS property sets an element's width. By default, it sets the width of the content area, but if box-sizing
is set to border-box
, it sets the width of the border area.
The min-width
and max-width
properties override width
.
Syntax
/* <length> values */ width: 300px; width: 25em; /* <percentage> value */ width: 75%; /* Keyword values */ width: max-content; width: min-content; width: fit-content(20em); width: auto; /* Global values */ width: inherit; width: initial; width: revert; width: unset;
Values
<length>
Defines the width as an absolute value.
<percentage>
Defines the width as a percentage of the containing block's width.
auto
The browser will calculate and select a width for the specified element.
max-content
The intrinsic preferred width.
min-content
The intrinsic minimum width.
fit-content(<length-percentage>
)
Uses the fit-content formula with the available space replaced by the specified argument, i.e. min(max-content, max(min-content, <length-percentage>))
.
Accessibility concerns
Ensure that elements set with a width
aren't truncated and/or don't obscure other content when the page is zoomed to increase text size.
Formal definition
Initial value | auto |
---|---|
Applies to | all elements but non-replaced inline elements, table rows, and row groups |
Inherited | no |
Percentages | refer to the width of the containing block |
Computed value | a percentage or auto or the absolute length |
Animation type | a length, percentage or calc(); |
Formal syntax
auto | <length> | <percentage> | min-content | max-content | fit-content | fit-content(<length-percentage>)where
<length-percentage> = <length> | <percentage>
Examples
Default width
p.goldie { background: gold; }
<p class="goldie">The Mozilla community produces a lot of great software.</p>
Example using pixels and ems
.px_length { width: 200px; background-color: red; color: white; border: 1px solid black; } .em_length { width: 20em; background-color: white; color: red; border: 1px solid black; }
<div class="px_length">Width measured in px</div> <div class="em_length">Width measured in em</div>
Example with percentage
.percent { width: 20%; background-color: silver; border: 1px solid red; }
<div class="percent">Width in percentage</div>
Example using "max-content"
p.maxgreen { background: lightgreen; width: intrinsic; /* Safari/WebKit uses a non-standard name */ width: -moz-max-content; /* Firefox/Gecko */ width: -webkit-max-content; /* Chrome */ width: max-content; }
<p class="maxgreen">The Mozilla community produces a lot of great software.</p>
Example using "min-content"
p.minblue { background: lightblue; width: -moz-min-content; /* Firefox */ width: -webkit-min-content; /* Chrome */ width: min-content; }
<p class="minblue">The Mozilla community produces a lot of great software.</p>
Specifications
Specification |
---|
CSS Box Sizing Module Level 4 # width-height-keywords |
See also
The box modelheight
box-sizing
min-width
, max-width
The mapped logical properties: block-size
, inline-size
Last modified: Feb 5, 2022, by MDN contributors
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