all - CSS: Cascading Style Sheets 编辑
The all shorthand CSS property resets all of an element's properties except unicode-bidi, direction, and CSS Custom Properties. It can set properties to their initial or inherited values, or to the values specified in another stylesheet origin.
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Syntax
/* Global values */
all: initial;
all: inherit;
all: unset;
/* CSS Cascading and Inheritance Level 4 */
all: revert;
The all property is specified as one of the CSS global keyword values. Note that none of these values affect the unicode-bidi and direction properties.
Values
initial- Specifies that all the element's properties should be changed to their initial values.
inherit- Specifies that all the element's properties should be changed to their inherited values.
unset- Specifies that all the element's properties should be changed to their inherited values if they inherit by default, or to their initial values if not.
revert- Specifies behavior that depends on the stylesheet origin to which the declaration belongs:
- User-agent origin
- Equivalent to
unset. - User origin
- Rolls back the cascade to the user-agent level, so that the specified values are calculated as if no author-level or user-level rules were specified for the element.
- Author origin
- Rolls back the cascade to the user level, so that the specified values are calculated as if no author-level rules were specified for the element. For purposes of
revert, the Author origin includes the Override and Animation origins.
Formal definition
| Initial value | There is no practical initial value for it. |
|---|---|
| Applies to | all elements |
| Inherited | no |
| Computed value | as the specified value applies to each property this is a shorthand for. |
| Animation type | as each of the properties of the shorthand (all properties but unicode-bidi and direction) |
Formal syntax
initial | inherit | unset | revert
Examples
HTML
<blockquote id="quote">
Lorem ipsum dolor sit amet, consectetur adipiscing elit.
</blockquote>
Phasellus eget velit sagittis.CSS
body {
font-size: small;
background-color: #F0F0F0;
color: blue;
}
blockquote {
background-color: skyblue;
color: red;
}
Result
No all property
The <blockquote> uses the browser's default styling together with a specific background and text color. It also behaves as a block element: the text that follows it is beneath it.
all:unset
The <blockquote> doesn't use the browser default styling: it is an inline element now (initial value), its background-color is transparent (initial value), but its font-size is still small (inherited value) and its color is blue (inherited value).
all:initial
The <blockquote> doesn't use the browser default styling: it is an inline element now (initial value), its background-color is transparent (initial value), its font-size is normal (initial value) and its color is black (initial value).
all:inherit
The <blockquote> doesn't use the browser default styling: it is a block element now (inherited value from its containing <body> element), its background-color is #F0F0F0 (inherited value), its font-size is small (inherited value) and its color is blue (inherited value).
Specifications
| Specification | Status | Comment |
|---|---|---|
| CSS Cascading and Inheritance Level 4 The definition of 'all' in that specification. | Candidate Recommendation | Added the revert value. |
| CSS Cascading and Inheritance Level 3 The definition of 'all' in that specification. | Candidate Recommendation | Initial definition. |
Browser compatibility
BCD tables only load in the browser
See also
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