javascript - Backbone .js : Associating params to events callback function

Question

我正在为事件列表创建自定义事件。我将这些事件放在一个文件(event.js)中，如下所示:

define(function(require, exports, module) {
module.exports =  {

    'event1': ['test1','data1'],
    'event2': ['test2','data2']
  };
});

我正在为每个事件创建事件触发器:

createTriggers: function(Events){ //Events = require(event.js);
      _.defer(function(){
        _.each(Events,function(data,event){
           var events = function () { console.log("Data is "+this.data)};
           events = _.bind(events,data); 
           targ.events.bind(event,events); //targ is the Backbone event object
        });
      });
  }

但是当我触发任何事件时:

  this.trigger("event1");

我得到输出，因为数据未定义。为什么未获取值 '['test1','data1']'？

Answer 1

考虑这两行:

var events = function () { console.log("Data is "+this.data)};
events = _.bind(events,data);

假设此时的 data 是一个数组 (['test1','data1'])，您的代码将执行以下操作:

console.log("Data is " + ['test1','data1'].data);

您可能想要:

var events = function () { console.log("Data is "+this)};
events = _.bind(events,data);

或

var events = function () { console.log("Data is "+this.data)};
events = _.bind(events,{data: data});

参见下划线绑定(bind)documentation了解更多示例。