You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
14 lines
544 B
14 lines
544 B
3 years ago
|
/* 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);
|
||
|
|
}
|