bc518174
 王天杨
提交两个项目文件
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/* eslint-disable no-bitwise, no-cond-assign */
/**
* Checks if an element contains another given element.
*
* @param context the context element
* @param node the element to check
*/
export default function contains(context, node) {
// HTML DOM and SVG DOM may have different support levels,
// so we need to check on context instead of a document root element.
if (context.contains) return context.contains(node);
if (context.compareDocumentPosition) return context === node || !!(context.compareDocumentPosition(node) & 16);
}
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