The sign() CSS function contains one calculation, and returns -1 if the numeric value of the argument is negative, +1 if the numeric value of the argument is positive, 0⁺ if the numeric value of the argument is 0⁺, and 0⁻ if the numeric value of the argument is 0⁻.
Note: While abs() returns the absolute value of the argument, sign() returns the sign of the argument.
/* property: sign(expression) */ top: sign( --value );
The sign() function takes only one expression as its argument.
No syntax available: No value found in the database.
For example, in background-position positive percentages resolve to a negative length, and vice versa, if the background image is larger than the background area. Thus sign(10%) might return 1 or -1, depending on how the percentage is resolved! (Or even 0, if it's resolved against a zero length.)
div { background-position: sign(10%); }
Another usecase is to control the position of the element. Either a positive or a negative value.
div { position: absolute; top: calc( 100px * sign( var( --value ) ) ); }
| Specification |
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| CSS Values and Units Module Level 5 # sign-funcs |
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https://developer.mozilla.org/en-US/docs/Web/CSS/sign_function
| Name | CSS |
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| Last Updated | 2022-04-27T17:24:15Z |