Help: "background-size" CSS property Help: "background-size" CSS propertyThis property sets the size of the background images. Negative values are not allowed.
| CSS Level | Value |
|---|---|
| CSS 2.1 | (invalid) |
| CSS3 | <bg-size>#, where <bg-size> is "[ <length> | <percentage> | auto ]{1,2} | cover | contain" |