padding

Summary

The padding property sets the padding space on all sides of an element. The padding area is the space between the content of the element and its border. Negative values are not allowed.

The padding property is a shorthand to avoid setting each side separately (padding-top, padding-right, padding-bottom, padding-left). 

Syntax

/* Apply to all four sides */
padding: 1em;

/* vertical | horizontal */
padding: 5% 10%;

/* top | horizontal | bottom */
padding: 1em 2em 2em; 

/* top | right | bottom | left */
padding: 2px 1em 0 1em;

padding: inherit;

取值

Specifies one, two, three or four of the following values:

<长度>

Specifies a non-negative fixed width. See <length> for details.

<百分比>

相对于包含块的宽度

• One single value applies to all 4 sides
• Two values apply to 1. top and bottom and 2. to the left and right side
• Three values apply to 1. top, 2. right and left and 3. to the bottom side
• Four values apply to 1. top, 2. right, 3. bottom and 4. to the left side

Note: padding no auto value

Formal syntax

[ <length> | <percentage> ]{1,4}

Examples

 padding: 5%;                /* on all sides 5% padding */

 padding: 10px;              /* on all sides 10px padding */

 padding: 10px 20px;         /*  top and bottom 10px padding  */
                            /*  left and right 20px padding  */

 padding: 10px 3% 20px;      /*  top 10px padding          */
                            /*  left and right 3% padding */
                            /*  bottom 20px padding       */

 padding: 1em 3px 30px 5px;  /*  top    1em  padding  */
                            /*  right  3px  padding  */
                            /*  bottom 30px padding  */
                            /*  left   5px  padding  */

border:outset; padding:5% 1em;

Live Sample

HTML

<h4>Hello world!</h4>
<h3>The padding is different in this line.</h3>

CSS

h4{
  background-color: green;
  padding: 50px 20px 20px 50px;
}

h3{
  background-color: blue;
  padding: 400px 50px 50px 400px;
}

Live Sample Link

Specifications

Browser compatibility

See also

• CSS Box Model