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<!DOCTYPE HTML>
<meta charset="utf-8">
<title>Test for env(scrollbar-inline-size)</title>
<script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>
<script src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" href="chrome://global/skin"/>
<link rel="stylesheet" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
<div id="scroller" style="width: 100px; height: 100px; overflow: scroll"></div>
<div id="ref" style="width: env(scrollbar-inline-size, 1000px)"></div>
<script>
SimpleTest.waitForExplicitFinish();
async function runTest() {
// We need to disable overlay scrollbars to measure the real scrollbar
// size.
await SpecialPowers.pushPrefEnv({
set: [["ui.useOverlayScrollbars", 0]],
});
runOnce();
info("with full zoom");
SpecialPowers.setFullZoom(window, 2.0);
runOnce();
}
function runOnce() {
let scroller = document.getElementById("scroller");
let ref = document.getElementById("ref");
let scrollbarSize = scroller.getBoundingClientRect().width - scroller.clientWidth;
ok(scrollbarSize > 0, "Should have a scrollbar");
// clientWidth rounds, so we might see a bit of rounding error
isfuzzy(ref.getBoundingClientRect().width, scrollbarSize, 1, "env() should match the scrollbar size");
}
runTest().then(SimpleTest.finish);
</script>
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