# Yahoo! UI Library

### event 3.0.0

Yahoo! UI Library > event > available.js (source view)
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    /**
     * DOM event listener abstraction layer
     * @module event
     * @submodule event-base
     */

    /**
     * Executes the callback as soon as the specified element
     * is detected in the DOM.
     * @event available
     * @param type {string} 'available'
     * @param fn {function} the callback function to execute.
     * @param el {string|HTMLElement|collection} the element(s) to attach
     * @param context optional argument that specifies what 'this' refers to.
     * @param args* 0..n additional arguments to pass on to the callback function.
     * These arguments will be added after the event object.
     * @return {EventHandle} the detach handle
     * @for YUI
     */
    Y.Env.evt.plugins.available = {
        on: function(type, fn, id, o) {
            var a = arguments.length > 4 ?  Y.Array(arguments, 4, true) : [];
            return Y.Event.onAvailable.call(Y.Event, id, fn, o, a);
        }
    };

    /**
     * Executes the callback as soon as the specified element
     * is detected in the DOM with a nextSibling property
     * (indicating that the element's children are available)
     * @event contentready
     * @param type {string} 'contentready'
     * @param fn {function} the callback function to execute.
     * @param el {string|HTMLElement|collection} the element(s) to attach
     * @param context optional argument that specifies what 'this' refers to.
     * @param args* 0..n additional arguments to pass on to the callback function.
     * These arguments will be added after the event object.
     * @return {EventHandle} the detach handle
     * @for YUI
     */
    Y.Env.evt.plugins.contentready = {
        on: function(type, fn, id, o) {
            var a = arguments.length > 4 ?  Y.Array(arguments, 4, true) : [];
            return Y.Event.onContentReady.call(Y.Event, id, fn, o, a);
        }
    };

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