css/cssom/cssstyledeclaration-removeProperty-all.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSSStyleDeclaration.removeProperty("all")</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="author" title="Mozilla" href="https://mozilla.org">
<link rel="help" href="https://drafts.csswg.org/cssom-1/#dom-cssstyledeclaration-removeproperty">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
  test(function() {
    let style = document.createElement("div").style;
    style.width = "40px";
    assert_equals(style.length, 1, "setter should work as expected");
    style.removeProperty("all");
    assert_equals(style.length, 0, "all is a shorthand of all properties, so should remove the property");
  });
</script>