happy-dom
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Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. It includes many web standards from WHATWG DOM and HTML.
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JavaScript
import * as PropertySymbol from '../../PropertySymbol.js';
import DOMException from '../../exception/DOMException.js';
import DOMExceptionNameEnum from '../../exception/DOMExceptionNameEnum.js';
import NamespaceURI from '../../config/NamespaceURI.js';
import ClassMethodBinder from '../../ClassMethodBinder.js';
/**
* Named Node Map.
*
* @see https://developer.mozilla.org/en-US/docs/Web/API/NamedNodeMap
*/
export default class NamedNodeMap {
// All items with the namespaceURI as prefix
[PropertySymbol.namespaceItems] = new Map();
// Items without namespaceURI as prefix, where the HTML namespace is the default namespace
[PropertySymbol.namedItems] = new Map();
/**
* Constructor.
*
* @param ownerElement Owner element.
*/
constructor(ownerElement) {
this[PropertySymbol.ownerElement] = ownerElement;
ClassMethodBinder.bindMethods(this, [NamedNodeMap], {
bindSymbols: true
});
}
/**
* Returns length.
*
* @returns Length.
*/
get length() {
return this[PropertySymbol.namespaceItems].size;
}
/**
* Returns string.
*
* @returns string.
*/
get [Symbol.toStringTag]() {
return 'NamedNodeMap';
}
/**
* Returns string.
*
* @returns string.
*/
toString() {
return '[object NamedNodeMap]';
}
/**
* Iterator.
*
* @returns Iterator.
*/
[Symbol.iterator]() {
return this[PropertySymbol.namespaceItems].values();
}
/**
* Returns item by index.
*
* @param index Index.
*/
item(index) {
const items = Array.from(this[PropertySymbol.namespaceItems].values());
return index >= 0 && items[index] ? items[index] : null;
}
/**
* Returns named item.
*
* @param name Name.
* @returns Item.
*/
getNamedItem(name) {
return (this[PropertySymbol.namedItems].get(this[PropertySymbol.getNamedItemKey](this[PropertySymbol.ownerElement][PropertySymbol.namespaceURI], name)) || null);
}
/**
* Returns item by name and namespace.
*
* @param namespace Namespace.
* @param localName Local name of the attribute.
* @returns Item.
*/
getNamedItemNS(namespace, localName) {
for (const item of this[PropertySymbol.namespaceItems].values()) {
if (item[PropertySymbol.namespaceURI] === namespace &&
item[PropertySymbol.localName] === localName) {
return item;
}
}
return null;
}
/**
* Sets named item.
*
* @param item Item.
* @returns Replaced item.
*/
setNamedItem(item) {
return this[PropertySymbol.setNamedItem](item);
}
/**
* Adds a new namespaced item.
*
* @alias setNamedItem()
* @param item Item.
* @returns Replaced item.
*/
setNamedItemNS(item) {
return this[PropertySymbol.setNamedItem](item);
}
/**
* Removes an item.
*
* @throws DOMException
* @param name Name of item.
* @returns Removed item.
*/
removeNamedItem(name) {
const item = this.getNamedItem(name);
if (!item) {
throw new DOMException(`Failed to execute 'removeNamedItem' on 'NamedNodeMap': No item with name '${name}' was found.`, DOMExceptionNameEnum.notFoundError);
}
this[PropertySymbol.removeNamedItem](item);
return item;
}
/**
* Removes a namespaced item.
*
* @param namespace Namespace.
* @param localName Local name of the item.
* @returns Removed item.
*/
removeNamedItemNS(namespace, localName) {
const item = this.getNamedItemNS(namespace, localName);
if (!item) {
throw new DOMException(`Failed to execute 'removeNamedItemNS' on 'NamedNodeMap': No item with name '${localName}' in namespace '${namespace}' was found.`, DOMExceptionNameEnum.notFoundError);
}
this[PropertySymbol.removeNamedItem](item);
return item;
}
/**
* Sets named item.
*
* @param item Item.
* @param [ignoreListeners] Ignore listeners.
* @returns Replaced item.
*/
[PropertySymbol.setNamedItem](item, ignoreListeners = false) {
if (!item[PropertySymbol.name]) {
return null;
}
item[PropertySymbol.ownerElement] = this[PropertySymbol.ownerElement];
const namespaceItemKey = this[PropertySymbol.getNamespaceItemKey](item);
const replacedItem = this[PropertySymbol.namespaceItems].get(namespaceItemKey) || null;
const replacedNamedItem = this[PropertySymbol.namedItems].get(item[PropertySymbol.name]) || null;
this[PropertySymbol.namespaceItems].set(namespaceItemKey, item);
// The HTML namespace should be prioritized over other namespaces in the namedItems map
// The HTML namespace is the default namespace
if ((!replacedNamedItem ||
(replacedNamedItem[PropertySymbol.namespaceURI] &&
replacedNamedItem[PropertySymbol.namespaceURI] !== NamespaceURI.html) ||
!item[PropertySymbol.namespaceURI] ||
item[PropertySymbol.namespaceURI] === NamespaceURI.html) &&
// Only lower case names should be stored in the namedItems map
(this[PropertySymbol.ownerElement][PropertySymbol.namespaceURI] !== NamespaceURI.html ||
item[PropertySymbol.name].toLowerCase() === item[PropertySymbol.name])) {
this[PropertySymbol.namedItems].set(item[PropertySymbol.name], item);
}
if (!ignoreListeners) {
this[PropertySymbol.ownerElement][PropertySymbol.onSetAttribute](item, replacedItem);
}
return replacedItem;
}
/**
* Removes named item.
*
* @param item Item.
* @param ignoreListeners
*/
[PropertySymbol.removeNamedItem](item, ignoreListeners = false) {
item[PropertySymbol.ownerElement] = null;
this[PropertySymbol.namespaceItems].delete(this[PropertySymbol.getNamespaceItemKey](item));
this[PropertySymbol.namedItems].delete(this[PropertySymbol.getNamedItemKey](this[PropertySymbol.ownerElement][PropertySymbol.namespaceURI], item[PropertySymbol.name]));
if (!ignoreListeners) {
this[PropertySymbol.ownerElement][PropertySymbol.onRemoveAttribute](item);
}
}
/**
* Returns item name based on namespace.
*
* @param namespaceURI Namespace.
* @param name Name.
* @returns Item name based on namespace.
*/
[PropertySymbol.getNamedItemKey](namespaceURI, name) {
if (!namespaceURI || namespaceURI === NamespaceURI.html) {
return name.toLowerCase();
}
return name;
}
/**
* Returns item key.
*
* @param item Item.
* @returns Key.
*/
[PropertySymbol.getNamespaceItemKey](item) {
if (!item[PropertySymbol.namespaceURI] ||
item[PropertySymbol.namespaceURI] === NamespaceURI.html) {
return item[PropertySymbol.name].toLowerCase();
}
return `${item[PropertySymbol.namespaceURI] || ''}:${item[PropertySymbol.name]}`;
}
}
//# sourceMappingURL=NamedNodeMap.js.map