40 lines
945 B
JavaScript
40 lines
945 B
JavaScript
function getScroll(w, top) {
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let ret = top ? w.pageYOffset : w.pageXOffset;
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const method = top ? 'scrollTop' : 'scrollLeft';
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if (typeof ret !== 'number') {
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const d = w.document;
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// ie6,7,8 standard mode
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ret = d.documentElement[method];
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if (typeof ret !== 'number') {
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// quirks mode
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ret = d.body[method];
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}
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}
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return ret;
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}
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function getClientPosition(elem) {
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let x;
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let y;
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const doc = elem.ownerDocument;
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const body = doc.body;
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const docElem = doc && doc.documentElement;
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const box = elem.getBoundingClientRect();
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x = box.left;
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y = box.top;
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x -= docElem.clientLeft || body.clientLeft || 0;
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y -= docElem.clientTop || body.clientTop || 0;
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return {
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left: x,
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top: y,
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};
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}
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export function getOffsetLeft(el) {
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const pos = getClientPosition(el);
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const doc = el.ownerDocument;
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const w = doc.defaultView || doc.parentWindow;
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pos.left += getScroll(w);
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return pos.left;
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}
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