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Contents
/* global dom, axe */
/**
* Find the virtual node and call dom.fundUpVirtual
*
* **WARNING:** this should be used sparingly, as it's not even close to being performant
* @method findUp
* @memberof axe.commons.dom
* @instance
* @param {HTMLElement} element The starting HTMLElement
* @param {String} target The selector for the HTMLElement
* @return {HTMLElement|null} Either the matching HTMLElement or `null` if there was no match
*/
dom.findUp = function(element, target) {
return dom.findUpVirtual(
axe.utils.getNodeFromTree(axe._tree[0], element),
target
);
};
/**
* recusively walk up the DOM, checking for a node which matches a selector
*
* **WARNING:** this should be used sparingly, as it's not even close to being performant
* @method findUpVirtual
* @memberof axe.commons.dom
* @instance
* @param {VirtualNode} element The starting virtualNode
* @param {String} target The selector for the HTMLElement
* @return {HTMLElement|null} Either the matching HTMLElement or `null` if there was no match
*/
dom.findUpVirtual = function(element, target) {
/*eslint complexity: ["error", 12]*/
let parent;
parent = element.actualNode;
// virtualNode will have a shadowId if the element lives inside a shadow DOM or is
// slotted into a shadow DOM
if (!element.shadowId && typeof element.actualNode.closest === 'function') {
// non-shadow DOM elements
let match = element.actualNode.closest(target);
if (match) {
return match;
}
return null;
}
// handle shadow DOM elements and older browsers
do {
// recursively walk up the DOM, checking each parent node
parent = parent.assignedSlot ? parent.assignedSlot : parent.parentNode;
if (parent && parent.nodeType === 11) {
parent = parent.host;
}
} while (
parent &&
!axe.utils.matchesSelector(parent, target) &&
parent !== document.documentElement
);
if (!axe.utils.matchesSelector(parent, target)) {
return null;
}
return parent;
};
Version data entries
104 entries across 104 versions & 1 rubygems