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40 lines
926 B
40 lines
926 B
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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