Quelle test_computed_style_no_flush.html

Sprache: HTML

products/Sources/formale Sprachen/C/Firefox/layout/style/test/test_computed_style_no_flush.html

<!doctype html>
<meta charset="utf-8">
<title>
  Test for bug 1363805: We only restyle as little as needed
</title>
<link rel="author" href="mailto:wpan@mozilla.com" title="Wei-Cheng Pan">
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<style>
.black {
  background-color: black;
}
.black + div {
  background-color: gray;
}
</style>
<div id="container">
  <div>
    <div id="foo">
    </div>
    <div id="bar">
    </div>
  </div>
</div>
<script>
function flushStyle () {
  getComputedStyle(document.body).width;
}

SimpleTest.waitForExplicitFinish();
const utils = SpecialPowers.getDOMWindowUtils(window);
const container = document.querySelector('#container');
const foo = document.querySelector('#foo');
const bar = document.querySelector('#bar');

flushStyle();
let currentRestyleGeneration = utils.restyleGeneration;

// No style changed, so we should not restyle.
getComputedStyle(foo).backgroundColor;
is(utils.restyleGeneration, currentRestyleGeneration,
   "Shouldn't restyle anything if no style changed");

// foo's parent has changed, must restyle.
container.classList.toggle('black');
getComputedStyle(foo).backgroundColor;
isnot(utils.restyleGeneration, currentRestyleGeneration,
      "Should have restyled something");

currentRestyleGeneration = utils.restyleGeneration;

// The change of foo should not affect its parent.
foo.classList.toggle('black');
getComputedStyle(container).backgroundColor;
is(utils.restyleGeneration, currentRestyleGeneration,
   "Shouldn't restyle anything if no style changed");

// It should restyle for foo's later sibling.
getComputedStyle(bar).backgroundColor;
isnot(utils.restyleGeneration, currentRestyleGeneration,
      "Should have restyled something");

SimpleTest.finish();
</script>

Messung V0.5 in Prozent

¤ Dauer der Verarbeitung: 0.18 Sekunden (vorverarbeitet am 2026-06-06) ¤

Wurzel

Suchen

PVS Prover

Isabelle Prover

NIST Cobol Testsuite

Cephes Mathematical Library

Vienna Development Method

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.