<!DOCTYPE html>

<link rel="help" href="https://drafts.csswg.org/css-values-5/#funcdef-random-item">

<link rel="author" title="Joanne Pan" href="https://github.com/J0pan">

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<div id="target"></div>

<script>

const target = document.getElementById('target');

// Nested random-item(): the inner function resolves after the outer selects it.

test(() => {

target.style.color = 'green';

target.style.color = 'random-item(fixed 0, random-item(fixed 0.999, red, rgb(1, 2, 3)), blue)';

assert_equals(getComputedStyle(target).color, 'rgb(1, 2, 3)');

}, 'random-item() nested inside random-item()');

// random-item() inside a var() reference.

test(() => {

target.style.cssText = '--list: random-item(fixed 0, rgb(1, 2, 3), rgb(4, 5, 6)); color: var(--list);';

assert_equals(getComputedStyle(target).color, 'rgb(1, 2, 3)');

}, 'random-item() resolved through var()');

// random-item() as a var() fallback.

test(() => {

target.style.cssText = 'color: var(--missing, random-item(fixed 0, rgb(7, 8, 9), blue));';

assert_equals(getComputedStyle(target).color, 'rgb(7, 8, 9)');

}, 'random-item() used as a var() fallback');

// random-item() feeding a shorthand property.

test(() => {

target.style.margin = '';

target.style.margin = 'random-item(fixed 0, 1px 2px, 3px 4px)';

const style = getComputedStyle(target);

assert_equals(style.marginTop, '1px');

assert_equals(style.marginRight, '2px');

}, 'random-item() expands in a shorthand property');

</script>