CSS width 属性

Definition and usage

The width property sets the width of the element.

This property defines the width of the element's content area, where padding, borders, and margins can be added outside the content area.

Inline non-replaced elements will ignore this property.

Set the height and width of paragraphs:

p
  {
  height:100px;
  width:100px;
  }

width: auto|value|initial|inherit;

Value	Description
auto	Default value. The browser can calculate the actual width.
length	Define the width using units such as px, cm, etc.
%	Define a percentage width based on the width of the containing block (parent element).
inherit	Specifies that the width property should inherit its value from the parent element.

Set the width of an element using pixel values: This example demonstrates how to set the width of an element using pixel values.
Set the width of an element using percentage: This example demonstrates how to set the width of an element using percentage values.

The numbers in the table indicate the first browser version that fully supports this attribute.

Chrome	IE / Edge	Firefox	Safari	Opera
1.0	4.0	1.0	1.0	3.5