(function() {
    var Explode = function(container, params) {
        ‘use strict‘;
        var n = this;
        if(!(this instanceof Explode)) return new Explode(container, params);
        var defaults = {
            img: ‘chi2.png‘,
            type: 1
        };
        params = params || {};    /*有参数传递进来赋给params,没有为空*/
        var originalParams = {};  /*备份传进来的params*/
        for(var param in params) {  /*遍历params*/
            if(typeof params[param] === ‘object‘) {  /*如果是对象,继续遍历该对象,再赋值*/
                originalParams[param] = {};
                for(var deepParam in params[param]) {
                    originalParams[param][deepParam] = params[param][deepParam];
                }
            } else {  /*不是对象,直接赋值*/
                originalParams[param] = params[param];
            }
        };
        for(var def in defaults) {   /*遍历默认的参数，如果传入的参数没有定义到，则把默认值加进来，若已定义，则默认值没用*/
            if(typeof params[def] === ‘undefined‘) {  /*比如:如果params[img]没有定义,则使用默认值*/
                params[def] = defaults[def];
            } else if(typeof params[def] === ‘object‘) {
                for(var deepDef in defaults[def]) {
                    if(typeof params[def][deepDef] === ‘undefined‘) {
                        params[def][deepDef] = defaults[def][deepDef];
                    }
                }
            }
        };
        n.params = params;
        n.originalParams = originalParams; 
        n.container = typeof container === ‘string‘ ? document.querySelectorAll(container) : container;
        if(!n.container || (n.container.length && n.container.length == 0)) return; /*没有container直接return*/
        if(n.container.length && n.container.length > 1) { /*有container且个数大于1*/
            var s = [];
            for(var i = 0; i < n.container.length; i++) {
                s.push(new Explode(n.container[i], params));
            };
            return s;
        };
        n.container = n.container[0] || n.container;   /*有且仅有一个container*/
})()