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<!DOCTYPE html>
<meta charset="utf-8">
<title>Last remembered size</title>
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com">
<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#last-remembered">
<link rel="help" href="https://drafts.csswg.org/css-sizing-4/#intrinsic-size-override">
<link rel="help" href="https://drafts.csswg.org/css-contain-2/#content-visibility">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/6220">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7527">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7532">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7539">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7564">
<link rel="help" href="https://github.com/w3c/csswg-drafts/issues/7606">
<meta name="assert" content="Tests that the last remembered size is properly updated or removed" />
<style>
#target {
width: max-content;
height: max-content;
}
.cis-auto {
contain-intrinsic-size: auto 1px auto 2px;
}
.skip-contents {
content-visibility: hidden;
}
.size-100-50 {
width: 100px;
height: 50px;
}
.size-75-25 {
width: 75px;
height: 25px;
}
.vertical {
writing-mode: vertical-lr;
}
.hidden {
display: none;
}
.flex {
display: flex;
}
.inline {
display: inline;
}
</style>
<div id="log"></div>
<div id="parent">
<div id="target">
<div id="contents"></div>
</div>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
const parent = document.getElementById("parent");
const target = document.getElementById("target");
const contents = document.getElementById("contents");
function checkSize(expectedWidth, expectedHeight, msg) {
assert_equals(target.clientWidth, expectedWidth, msg + " - clientWidth");
assert_equals(target.clientHeight, expectedHeight, msg + " - clientHeight");
}
function nextRendering() {
return new Promise(resolve => {
requestAnimationFrame(() => requestAnimationFrame(() => resolve()));
});
}
function cleanup() {
parent.className = "";
target.className = "";
contents.className = "";
checkSize(0, 0, "Sizing after cleanup");
}
promise_test(async function() {
this.add_cleanup(cleanup);
target.className = "cis-auto skip-contents";
contents.classList.add("size-100-50");
checkSize(1, 2, "Size containment with no last remembered size");
target.classList.remove("skip-contents");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
checkSize(100, 50, "Using last remembered size");
contents.classList.remove("size-100-50");
contents.classList.add("size-75-25");
checkSize(100, 50, "Still using last remembered size");
target.classList.remove("skip-contents");
checkSize(75, 25, "Sizing normally with different size");
target.classList.add("skip-contents");
checkSize(100, 50, "Going back to last remembered size");
target.classList.remove("skip-contents");
await nextRendering();
target.classList.add("skip-contents");
checkSize(75, 25, "Using the new last remembered size");
}, "Basic usage");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
checkSize(0, 0, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
contents.classList.add("size-100-50");
checkSize(0, 0, "Using last remembered size");
}, "Last remembered size can be 0");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
parent.classList.add("hidden");
checkSize(0, 0, "No box");
await nextRendering();
parent.classList.remove("hidden");
contents.classList.remove("size-100-50");
checkSize(0, 0, "Sizing normally to 0x0");
await nextRendering();
contents.classList.add("size-100-50");
target.classList.add("skip-contents");
checkSize(0, 0, "Using the new last remembered size");
}, "Last remembered size can be set to 0 after losing display:none");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
contents.classList.remove("size-100-50");
checkSize(100, 50, "Using last remembered size");
target.classList.add("vertical");
checkSize(50, 100, "Last remembered size is logical");
}, "Last remembered size is logical");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
checkSize(100, 50, "Using last remembered size");
parent.classList.add("hidden");
checkSize(0, 0, "No box");
await nextRendering();
parent.classList.remove("hidden");
contents.classList.remove("size-100-50");
checkSize(100, 50, "Still using last remembered size");
}, "Last remembered size survives box destruction");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
contents.classList.remove("size-100-50");
checkSize(100, 50, "Using last remembered size");
target.classList.add("flex");
checkSize(100, 50, "Still using last remembered size");
}, "Last remembered size survives display type changes");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
checkSize(100, 50, "Using last remembered size");
target.classList.remove("cis-auto");
checkSize(0, 0, "Basic size containment");
await nextRendering();
target.classList.add("cis-auto");
checkSize(1, 2, "Size containment with no last remembered size");
}, "Losing cis:auto removes last remembered size");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.remove("cis-auto");
checkSize(100, 50, "Sizing normally again");
await nextRendering();
target.classList.add("cis-auto");
target.classList.add("skip-contents");
checkSize(1, 2, "Size containment with no last remembered size");
}, "Losing cis:auto removes last remembered size even if size doesn't change");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
checkSize(100, 50, "Using last remembered size");
target.classList.remove("cis-auto");
checkSize(0, 0, "Basic size containment");
target.classList.add("cis-auto");
checkSize(1, 2, "Size containment with no last remembered size");
}, "Losing cis:auto removes last remembered size immediately");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
contents.classList.remove("size-100-50");
contents.classList.add("size-75-25");
checkSize(100, 50, "Using last remembered size");
parent.classList.add("hidden");
target.classList.remove("cis-auto");
target.classList.remove("skip-contents");
checkSize(0, 0, "No box");
await nextRendering();
parent.classList.remove("hidden");
target.classList.add("cis-auto");
contents.classList.remove("size-100-50");
contents.classList.add("size-75-25");
checkSize(75, 25, "Sizing normally with different size");
target.classList.add("skip-contents");
checkSize(100, 50, "Going back to last remembered size");
}, "Losing cis:auto during display:none doesn't remove last remembered size");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
contents.classList.remove("size-100-50");
contents.classList.add("size-75-25");
checkSize(100, 50, "Using last remembered size");
parent.classList.add("hidden");
checkSize(0, 0, "No box");
await nextRendering();
parent.classList.remove("hidden");
target.classList.remove("cis-auto");
checkSize(0, 0, "Basic size containment");
target.classList.add("cis-auto");
checkSize(1, 2, "Size containment with no last remembered size");
}, "Lack of cis:auto during box creation removes last remembered size");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
contents.classList.remove("size-100-50");
contents.classList.add("size-75-25");
checkSize(100, 50, "Using last remembered size");
parent.classList.add("hidden");
target.classList.remove("cis-auto");
checkSize(0, 0, "No box");
parent.classList.remove("hidden");
checkSize(0, 0, "Basic size containment");
target.classList.add("cis-auto");
checkSize(1, 2, "Size containment with no last remembered size");
}, "Last remembered size can be removed synchronously");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
checkSize(100, 50, "Using last remembered size");
target.remove();
checkSize(0, 0, "No box");
parent.appendChild(target);
checkSize(100, 50, "Still using last remembered size");
}, "Disconnected element can briefly keep last remembered size");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
contents.classList.remove("size-100-50");
contents.classList.add("size-75-25");
checkSize(100, 50, "Using last remembered size");
target.remove();
checkSize(0, 0, "No box");
await nextRendering();
parent.appendChild(target);
checkSize(1, 2, "Size containment with no last remembered size");
}, "Disconnected element ends up losing last remembered size");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
checkSize(0, 0, "Sizing normally");
await nextRendering();
target.classList.add("skip-contents");
target.remove();
checkSize(0, 0, "No box");
await nextRendering();
parent.appendChild(target);
checkSize(1, 2, "Size containment with no last remembered size");
}, "Disconnected element ends up losing last remembered size even if size was 0x0");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("inline");
checkSize(0, 0, "Non-atomic inline box");
await nextRendering();
target.classList.remove("inline");
target.classList.add("skip-contents");
contents.classList.remove("size-100-50");
checkSize(100, 50, "Still using previous last remembered size");
}, "Last remembered size survives becoming inline");
promise_test(async function() {
this.add_cleanup(cleanup);
target.classList.add("cis-auto");
contents.classList.add("size-100-50");
checkSize(100, 50, "Sizing normally");
await nextRendering();
target.classList.add("inline");
checkSize(0, 0, "Non-atomic inline box");
await nextRendering();
target.classList.remove("inline");
contents.classList.remove("size-100-50");
checkSize(0, 0, "Sizing normally to 0x0");
await nextRendering();
target.classList.add("skip-contents");
contents.classList.add("size-100-50");
checkSize(0, 0, "Last remembered size is now 0x0");
}, "Last remembered size can be set to 0x0 after losing display:inline");
</script>
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