46 lines
1.6 KiB
JavaScript
46 lines
1.6 KiB
JavaScript
import _extends from "@babel/runtime/helpers/esm/extends";
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import css from './css';
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import getOffset from './offset';
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import getOffsetParent from './offsetParent';
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import scrollLeft from './scrollLeft';
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import scrollTop from './scrollTop';
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var nodeName = function nodeName(node) {
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return node.nodeName && node.nodeName.toLowerCase();
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};
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/**
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* Returns the relative position of a given element.
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*
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* @param node the element
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* @param offsetParent the offset parent
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*/
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export default function position(node, offsetParent) {
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var parentOffset = {
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top: 0,
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left: 0
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};
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var offset; // Fixed elements are offset from window (parentOffset = {top:0, left: 0},
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// because it is its only offset parent
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if (css(node, 'position') === 'fixed') {
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offset = node.getBoundingClientRect();
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} else {
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var parent = offsetParent || getOffsetParent(node);
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offset = getOffset(node);
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if (nodeName(parent) !== 'html') parentOffset = getOffset(parent);
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var borderTop = String(css(parent, 'borderTopWidth') || 0);
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parentOffset.top += parseInt(borderTop, 10) - scrollTop(parent) || 0;
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var borderLeft = String(css(parent, 'borderLeftWidth') || 0);
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parentOffset.left += parseInt(borderLeft, 10) - scrollLeft(parent) || 0;
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}
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var marginTop = String(css(node, 'marginTop') || 0);
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var marginLeft = String(css(node, 'marginLeft') || 0); // Subtract parent offsets and node margins
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return _extends({}, offset, {
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top: offset.top - parentOffset.top - (parseInt(marginTop, 10) || 0),
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left: offset.left - parentOffset.left - (parseInt(marginLeft, 10) || 0)
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});
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} |