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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
Summary
The padding-block-start CSS property defines the logical block start padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation. It corresponds to the padding-top, padding-right, padding-bottom, or padding-left property depending on the values defined for writing-mode, direction, and text-orientation.
It relates to padding-block-end, padding-inline-start, and padding-inline-end, which define the other paddings of the element.
| Initial value | 0 |
|---|---|
| Applies to | all elements |
| Inherited | no |
| Percentages | logical-width of containing block |
| Media | visual |
| Computed value | as <length> |
| Animation type | discrete |
| Canonical order | the unique non-ambiguous order defined by the formal grammar |
Syntax
/* <length> values */ padding-block-start: 10px; /* An absolute length */ padding-block-start: 1em; /* A length relative to the text size */ /* <percentage> value */ padding-block-start: 5%; /* A padding relative to the block container's width */ /* Global values */ padding-block-start: inherit; padding-block-start: initial; padding-block-start: unset;
Values
The padding-block-start property takes the same values as the padding-left property.
Formal syntax
<'padding-left'>
Example
HTML Content
<div> <p class="exampleText">Example text</p> </div>
CSS Content
div {
background-color: yellow;
width: 120px;
height: 120px;
}
.exampleText {
writing-mode: vertical-lr;
padding-block-start: 20px;
background-color: #C8C800;
}
Specification
| Specification | Status | Comment |
|---|---|---|
| CSS Logical Properties Level 1 The definition of 'padding-block-start' in that specification. |
Editor's Draft | Initial definition |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | No support | 41.0 (41.0)[1] | No support | No support | No support |
| Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|
| Basic support | No support | 41.0 (41.0)[1] | No support | No support | No support |
[1] Available since Gecko 38, but behind the preference layout.css.vertical-text.enabled, then disabled by default. The preference has been removed in Gecko 51 and this property cannot be disabled since this version.
See also
- The mapped physical properties:
padding-top,padding-right,padding-bottom, andpadding-left writing-mode,direction,text-orientation