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Avoid using getBoundingClientRect to calculate height (#4001)

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Nolan Lawson 2017-07-07 16:57:22 -07:00 • committed by Eugen Rochko
parent 8fecd80108
commit 63b77f2320
4 changed files with 30 additions and 20 deletions
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21
app/javascript/mastodon/features/ui/util/get_rect_from_entry.js Normal file
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@ -0,0 +1,21 @@
// Get the bounding client rect from an IntersectionObserver entry.
// This is to work around a bug in Chrome: https://crbug.com/737228
let hasBoundingRectBug;
function getRectFromEntry(entry) {
if (typeof hasBoundingRectBug !== 'boolean') {
const boundingRect = entry.target.getBoundingClientRect();
const observerRect = entry.boundingClientRect;
hasBoundingRectBug = boundingRect.height !== observerRect.height ||
boundingRect.top !== observerRect.top ||
boundingRect.width !== observerRect.width ||
boundingRect.bottom !== observerRect.bottom ||
boundingRect.left !== observerRect.left ||
boundingRect.right !== observerRect.right;
}
return hasBoundingRectBug ? entry.target.getBoundingClientRect() : entry.boundingClientRect;
}
export default getRectFromEntry;