イベント処理の委譲

ステートフルJavaScript4.2.4

by FiNGAHOLiC

HTML

<script src="https://getfirebug.com/firebug-lite-debug.js"></script>
<div id="users">
    <form>
        <input type="search" value="" placeholder="Enter a query">
        <button>Search</button>
    </form>
</div>

JavaScript

var exports = this;

(function($, exports){
    var mod = {};
    
    mod.create = function(includes){
        var result = function(){
            this.initializer.apply(this, arguments);
            this.init.apply(this, arguments);
        };
        
        result.fn = result.prototype;
        result.fn.init = function(){};
        
        result.proxy = function(func){ return $.proxy(func, this); };
        result.fn.proxy = result.proxy;
        
        result.include = function(ob){ $.extend(this.fn, ob); };
        result.extend = function(ob){ $.extend(this, ob); };
        
        result.include({
            initializer: function(options){
                this.options = options;
                
                for(var key in this.options){
                    this[key] = this.options[key];
                };
                
                if(this.events) this.delegateEvents();
                if(this.elements) this.refreshElements();
            },
            $: function(selector){
                return $(selector, this.el);
            },
            refreshElements: function(){
                for(var key in this.elements){
                    this[this.elements[key]] = this.$(key);
                };
            },
            eventSplitter: /^(\w+)\s*(.*)$/,
            delegateEvents: function(){
                for(var key in this.events){
                    var methodName = this.events[key];
                    var method = this.proxy(this[methodName]);
                    
                    var match = key.match(this.eventSplitter);
                    var eventName = match[1], selector = match[2];
                    
                    if(selector === ''){
                        this.el.bind(eventName, method);
                    }else{
                        this.el.delegate(selector, eventName, method);
                    };
                };
            }
        });
        
        if(includes)...