javascript - Bind all methods to 'this' -

i have iife methods defined in it, public , not.

in lot of functions (including private ones) use 'this' keyword, make sure i'm in right context, need use .call(this) method. there way bind functions inside iife correct context, without having use call()?

defining var self=this not option since messes knockout context.

ko.utils.extend(singleselectdropdownviewmodel.prototype, (function () {             var strings = {                 all: l10n('all')             };         //public functions         var init = function (params) {              this.selectedvalue = params.selectedvalue;             this.title = ko.observable();              this.items = params.items;             this.menuopen = ko.observable(false);              //would avoid using call , use _settitle()             _settitle.call(this);         },          ...         //private functions         _settitle = function(){             if (ko.unwrap(this.selectedvalue)){                 var = util.index(this.items(),ko.unwrap(this.selectedvalue),'id');                 = > -1 ? : 0;                 this.title(this.items()[i].text);             }             else {                 this.title(this.items()[0].text);             }          },           _hidemenu = function(){             this.menuopen(false);         },           ...         return {             init: init         };      })()); 

i suggest stick using this in functions methods of object, , using function parameters rest of time. if so, code becomes:

ko.utils.extend(singleselectdropdownviewmodel.prototype, (function () {     var strings = {         all: l10n('all')     };     //public functions     var init = function (params) {          this.selectedvalue = params.selectedvalue;         this.title = ko.observable();          this.items = params.items;         this.menuopen = ko.observable(false);          //would avoid using call , use _settitle()         _settitle(this);     },      ...     //private functions     _settitle = function (obj) {         if (ko.unwrap(obj.selectedvalue)){             var = util.index(obj.items(),ko.unwrap(obj.selectedvalue),'id');             = > -1 ? : 0;             obj.title(obj.items()[i].text);         }         else {             obj.title(obj.items()[0].text);         }     },       _hidemenu = function(obj){         obj.menuopen(false);     },       ...     return {         init: init     };  })());