The unset
CSS keyword resets a property to its inherited value if it inherits from its parent, and to its initial value if not. In other words, it behaves like the inherit
keyword in the first case, and like the initial
keyword in the second case. It can be applied to any CSS property, including the CSS shorthand all
.
<p>This text is red.</p> <div class="foo"> <p>This text is also red.</p> </div> <div class="bar"> <p>This text is green (default inherited value).</p> </div>
.foo { color: blue; } .bar { color: green; } p { color: red; } .bar p { color: unset; }
<p>This text has a red border.</p> <div> <p>This text has a red border.</p> </div> <div class="bar"> <p>This text has has a black border (initial default, not inherited).</p> </div>
div { border: 1px solid green; } p { border: 1px solid red; } .bar p { border-color: unset; }
Specification | Status | Comment |
---|---|---|
CSS Cascading and Inheritance Level 4 The definition of 'unset' in that specification. | Working Draft | No changes from Level 3. |
CSS Cascading and Inheritance Level 3 The definition of 'unset' in that specification. | Candidate Recommendation | Initial definition. |
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 41 | 27 (27) | Edge build 10565+ | 28 | 9.1 |
Feature | Android | Firefox Mobile (Gecko) | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|
Basic support | No support | 27.0 (27) | No support | No support | 9.3 |
initial
to set a property to its initial value.revert
to reset a property to the value established by the user-agent stylesheet (or by user styles, if any exist).inherit
to make an element's property the same as its parent.
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https://developer.mozilla.org/en-US/docs/Web/CSS/unset