;(function() {
 "user strict";
 //默认参数
 var size = {
  var options = {
   color: 'red'
  };
 }
 
 //插件函数color
 var color = {
  
  //更新配置参数
  var config: function(opts) {
   if(!opts) return options;
   for (var k in opts) {
    options[k] = opts[k];
   }
   return this;
  },
  
  //监听事件
  var listen: function(elem) {
   var elems = document.getElementById('elem');
        elems.addEventListener('click',function() {
        this.style.color = options.color;
   })  
  }
  return this;
 }
 window.Color = color;
})()

 

//对象链式调用：

//Color.config({color: 'red'}).listen('#sz');