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