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https://github.com/HeyPuter/firefox.git
synced 2026-11-13 20:14:57 -10:00
Martin Robinson
979e004aff
Automatic update from web-platform-tests WebKit export of https://bugs.webkit.org/show_bug.cgi?id=229602 (#30211) -- wpt-commits: 481890e388fb8144da304f8321d1f91a7eaf559d wpt-pr: 30211
35 lines
1.5 KiB
JavaScript
35 lines
1.5 KiB
JavaScript
/**
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* The function positions a new div to exactly the bounding client rect without
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* using sticky position. If it's directly under the sticky element it could be
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* obscured and not show up when compared to the ref. */
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function createIndicatorForStickyElements(sticky_divs) {
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if (sticky_divs.length == 0)
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throw "No sticky div was found in the test case.";
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sticky_divs.forEach((sticky_div) => {
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if (getComputedStyle(sticky_div).position != "sticky")
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throw "Provided sticky element does not have position: sticky";
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});
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document.fonts.ready.then(() => {
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sticky_divs.forEach((sticky_div) => {
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// The relative position indicator will be able to share the same containing
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// block to match the position with the same offset from in flow position
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// (offsetTop/offsetLeft)
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let position_div = document.createElement("div");
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position_div.style.left = sticky_div.offsetLeft + "px";
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position_div.style.top = sticky_div.offsetTop + "px";
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// The absolute position is to ensure that the position_div adds zero size
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// to in flow layout
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position_div.style.position = "absolute"
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let indicator_div = document.createElement("div");
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indicator_div.style.width = sticky_div.offsetWidth + "px";
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indicator_div.style.height = sticky_div.offsetHeight + "px";
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indicator_div.style.backgroundColor = "blue";
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indicator_div.style.position = "relative";
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position_div.appendChild(indicator_div);
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sticky_div.parentNode.insertBefore(position_div, sticky_div);
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});
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});
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}
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