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rOACCT/node_modules/domutils/lib/traversal.js
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traversal.js
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			"use strict";
			Object.defineProperty(exports, "__esModule", { value: true });
			exports.prevElementSibling = exports.nextElementSibling = exports.getName = exports.hasAttrib = exports.getAttributeValue = exports.getSiblings = exports.getParent = exports.getChildren = void 0;
			var domhandler_1 = require("domhandler");
			var emptyArray = [];
			/**
			* Get a node's children.
			*
			* @param elem Node to get the children of.
			* @returns `elem`'s children, or an empty array.
			*/
			function getChildren(elem) {
			var _a;
			return (_a = elem.children) !== null && _a !== void 0 ? _a : emptyArray;
			}
			exports.getChildren = getChildren;
			/**
			* Get a node's parent.
			*
			* @param elem Node to get the parent of.
			* @returns `elem`'s parent node.
			*/
			function getParent(elem) {
			return elem.parent \|\| null;
			}
			exports.getParent = getParent;
			/**
			* Gets an elements siblings, including the element itself.
			*
			* Attempts to get the children through the element's parent first.
			* If we don't have a parent (the element is a root node),
			* we walk the element's `prev` & `next` to get all remaining nodes.
			*
			* @param elem Element to get the siblings of.
			* @returns `elem`'s siblings.
			*/
			function getSiblings(elem) {
			var _a, _b;
			var parent = getParent(elem);
			if (parent != null)
			return getChildren(parent);
			var siblings = [elem];
			var prev = elem.prev, next = elem.next;
			while (prev != null) {
			siblings.unshift(prev);
			(_a = prev, prev = _a.prev);
			}
			while (next != null) {
			siblings.push(next);
			(_b = next, next = _b.next);
			}
			return siblings;
			}
			exports.getSiblings = getSiblings;
			/**
			* Gets an attribute from an element.
			*
			* @param elem Element to check.
			* @param name Attribute name to retrieve.
			* @returns The element's attribute value, or `undefined`.
			*/
			function getAttributeValue(elem, name) {
			var _a;
			return (_a = elem.attribs) === null \|\| _a === void 0 ? void 0 : _a[name];
			}
			exports.getAttributeValue = getAttributeValue;
			/**
			* Checks whether an element has an attribute.
			*
			* @param elem Element to check.
			* @param name Attribute name to look for.
			* @returns Returns whether `elem` has the attribute `name`.
			*/
			function hasAttrib(elem, name) {
			return (elem.attribs != null &&
			Object.prototype.hasOwnProperty.call(elem.attribs, name) &&
			elem.attribs[name] != null);
			}
			exports.hasAttrib = hasAttrib;
			/**
			* Get the tag name of an element.
			*
			* @param elem The element to get the name for.
			* @returns The tag name of `elem`.
			*/
			function getName(elem) {
			return elem.name;
			}
			exports.getName = getName;
			/**
			* Returns the next element sibling of a node.
			*
			* @param elem The element to get the next sibling of.
			* @returns `elem`'s next sibling that is a tag.
			*/
			function nextElementSibling(elem) {
			var _a;
			var next = elem.next;
			while (next !== null && !(0, domhandler_1.isTag)(next))
			(_a = next, next = _a.next);
			return next;
			}
			exports.nextElementSibling = nextElementSibling;
			/**
			* Returns the previous element sibling of a node.
			*
			* @param elem The element to get the previous sibling of.
			* @returns `elem`'s previous sibling that is a tag.
			*/
			function prevElementSibling(elem) {
			var _a;
			var prev = elem.prev;
			while (prev !== null && !(0, domhandler_1.isTag)(prev))
			(_a = prev, prev = _a.prev);
			return prev;
			}
			exports.prevElementSibling = prevElementSibling;