19 lines
737 B
JavaScript
19 lines
737 B
JavaScript
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export function getTargetRect(target) {
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return target !== window ? target.getBoundingClientRect() : {
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top: 0,
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bottom: window.innerHeight
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};
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}
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export function getFixedTop(placeholderRect, targetRect, offsetTop) {
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if (offsetTop !== undefined && Math.round(targetRect.top) > Math.round(placeholderRect.top) - offsetTop) {
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return offsetTop + targetRect.top;
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}
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return undefined;
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}
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export function getFixedBottom(placeholderRect, targetRect, offsetBottom) {
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if (offsetBottom !== undefined && Math.round(targetRect.bottom) < Math.round(placeholderRect.bottom) + offsetBottom) {
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const targetBottomOffset = window.innerHeight - targetRect.bottom;
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return offsetBottom + targetBottomOffset;
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}
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return undefined;
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}
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