javascript - Why does JS report 'this.function' as not being a function? -

i wonder if please me understand seems odd js?

the below code works. function inlineeditevent.init() called, , t.copy() called correctly (where var t = this;).

however, if replace this.copy(), error this.copy not function.

what's difference here? why below work, not way described in last paragraph? thanks.

jquery(function($){      $(document).ready(function(){inlineeditevent.init();});      inlineeditevent = {          init : function(){              var t = this;              /** copy row on click */             $('#the-list').on('click', '.row-actions a.single-copy', function(){                 return t.copy();             });          }, // init          copy : function(){              // stuff here          }      } // inlineeditevent  }); 

this refers this within functions scope. that's why need set self variable, it's accessible within scope of function. considering you're using jquery, use $.proxy:

$.proxy(function(){     return this.copy(); },this)