layout/style/test/test_hover_on_part.html
author Cristian Tuns <ctuns@mozilla.com>
Fri, 24 Sep 2021 14:42:22 -0400
changeset 593147 0b4005ebc9776ff43d99d1427c1a1fd2e14d9a44
parent 506070 dc76935015345e9943fb3a363433b0309636dc07
permissions -rw-r--r--
Backed out changeset dd075a074e45 (bug 1730518) for causing content crashes (bug 1732479). CLOSED TREE

<!doctype html>
<title>Shadow parts are invalidated correctly when only a pseudo-class state to the right of the part matches</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<style>
  div {
    width: 100px;
    height: 100px;
  }
  #host::part(p) {
    background-color: red;
  }
  #host::part(p):hover {
    background-color: lime;
  }
</style>
<div id="host"></div>
<div id="random-element-to-force-change"></div>
<script>
SimpleTest.waitForExplicitFinish();

let host = document.getElementById("host");
host.attachShadow({ mode: "open" }).innerHTML = `
  <style>
    div {
      width: 100px;
      height: 100px;
    }
  </style>
  <div part=p></div>
`;

let part = host.shadowRoot.querySelector("div");
let other = document.getElementById("random-element-to-force-change");

SimpleTest.waitForFocus(function() {
  synthesizeMouseAtCenter(other, {type: "mousemove"});
  is(
    getComputedStyle(part).backgroundColor,
    "rgb(255, 0, 0)",
    "Part is red"
  );

  synthesizeMouseAtCenter(part, {type: "mousemove"});
  is(
    getComputedStyle(part).backgroundColor,
    "rgb(0, 255, 0)",
    "Part is lime"
  );
  SimpleTest.finish();
});
</script>