File: if-function-revert-rule.html

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<!DOCTYPE html>
<title>The revert-rule keyword: interaction with if()</title>
<link rel="help" href="https://drafts.csswg.org/css-cascade-5/#revert-rule-keyword">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<style>
  #test1 {
    color: green;
  }
  #test1 {
    color: red;
    --x: 3;
    color: if(style(--x:1000):red; else:revert-rule);
  }
</style>
<div id=test1></div>
<script>
  test(() => {
    assert_true(CSS.supports('color:revert-rule'));
    assert_equals(getComputedStyle(test1).color, 'rgb(0, 128, 0)')
  }, 'The revert-rule works as a branch in if()');
</script>


<style>
  #test2 {
    color: green;
  }
  #test2 {
    color: red;
    --x: 1000;
    color: if(style(--x:1000):revert-rule; else:red);
  }
</style>
<div id=test2></div>
<script>
  test(() => {
    assert_true(CSS.supports('color:revert-rule'));
    assert_equals(getComputedStyle(test2).color, 'rgb(0, 128, 0)')
  }, 'The revert-rule works as a branch in if(), earlier return');
</script>