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/**
 * Extended Node interface with a basic IO API.
 * @module node
 * @submodule node-load
 */
/**
 * The default IO complete handler.
 * @method _ioComplete
 * @protected
 * @for Node
 * @param {String} code The response code.
 * @param {Object} response The response object.
 * @param {Array} args An array containing the callback and selector
 */
Y.Node.prototype._ioComplete = function(code, response, args) {
 var selector = args[0],
 callback = args[1],
 tmp,
 content;
 if (response && response.responseText) {
 content = response.responseText;
 if (selector) {
 tmp = Y.DOM.create(content);
 content = Y.Selector.query(selector, tmp);
 }
 this.setContent(content);
 }
 if (callback) {
 callback.call(this, code, response);
 }
};
/**
 * Loads content from the given url and replaces the Node's
 * existing content with the remote content.
 * @method load
 * @param {String} url The URL to load via XMLHttpRequest.
 * @param {String} selector An optional selector representing a subset of an HTML document to load.
 * @param {Function} callback An optional function to run after the content has been loaded.
 * @chainable
 */
Y.Node.prototype.load = function(url, selector, callback) {
 if (typeof selector == 'function') {
 callback = selector;
 selector = null;
 }
 var config = {
 context: this,
 on: {
 complete: this._ioComplete
 },
 arguments: [selector, callback]
 };
 Y.io(url, config);
 return this;
};