javascript - undefined reference to object method in it's property on jQuery plugin -

i have problem in line #27 (fiddle: https://jsfiddle.net/hh82p4fj/1/)

why property points undefined while it's in same closure?

"use strict";  function callself(instance, callback) { // saves 'this' state reuse inside function     return function () {         var argumentslist = [this], i;          (i = 0; < arguments.length; = + 1) {             argumentslist.push(arguments[i]);         }          return callback.apply(instance, argumentslist);     }; }  var namespace = function () {     var settings = { handler: this.method };      this.initialize = function () {         $.fn.myplugin = callself(this, function (that, userinput) {             /* = namespace                = jquery element                userinput = provided in line 30 parameter             */             console.log(this);             console.log(that);             console.log(userinput);             console.log(settings.handler); // why why it's undefined?         });          $('body').myplugin('somedata');     };      this.method = function () { console.info('method'); }; // method should returned reference in line 27, can not reah 'this` - don't know why }; new namespace().initialize(); 

callself needed there, preserve both jquery this context ando ryginal object closure.

var settings = { handler: this.method }; 

you assigned settings.handler not reference this.method
but value of this.method (which undefined @ execution moment)

this.method must object referenced.

---

this.method = {}; //empty object var settings = { handler: this.method }; 

this.method =>_ref {}
settings.handler =>_ref {}

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this.method = {}; //empty object var settings = { handler: this.method }; this.method = funtion(){}`// reference replaced 

this.method =>_ref funtion(){}
settings.handler =>_ref {}

---

this.method = {}; //empty object var settings = { handler: this.method }; this.method.use = function(){} 

this.method =>_ref {use: function(){}}
settings.handler =>_ref {use: function(){}}

---

function namespace(){          var settings = {};        this.initialize = function(){          document.write(settings.handler())      };        settings.handler = function(){return 'handled!'};  }  new namespace().initialize()