forked from cybrespace/pinafore
23 lines
776 B
JavaScript
23 lines
776 B
JavaScript
// Get the bounding client rect from an IntersectionObserver entry.
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// This is to work around a bug in Chrome: https://crbug.com/737228
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let hasBoundingRectBug
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function rectsAreEqual (rectA, rectB) {
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return rectA.height === rectB.height &&
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rectA.top === rectB.top &&
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rectA.width === rectB.width &&
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rectA.bottom === rectB.bottom &&
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rectA.left === rectB.left &&
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rectA.right === rectB.right
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}
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export function getRectFromEntry (entry) {
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if (typeof hasBoundingRectBug !== 'boolean') {
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const boundingRect = entry.target.getBoundingClientRect()
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const observerRect = entry.boundingClientRect
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hasBoundingRectBug = !rectsAreEqual(boundingRect, observerRect)
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}
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return hasBoundingRectBug ? entry.target.getBoundingClientRect() : entry.boundingClientRect
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}
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