round(), mod(), and rem()✓Baseline · Newly available

Browser support

How to use

Every current browser supports this, but it only became Baseline on May 17, 2024. Use it as a progressive enhancement, or keep a fallback if you support older devices.

@supports (width: mod(5px, 2px)) {
  /* styles that use mod */
}

/* or in JavaScript */
if (CSS.supports("width", "mod(5px, 2px)")) {
  // use it
}

Sub-features

Support for each part of the feature (6). The overall table above shows when the whole feature works.