JavaScript “this” references wrong object [duplicate]

Answer 1

The function keyword changes scope. One solution is to maintain the reference to the "this" that you want to use.

Try the following:

function someObj() {
   var self = this;
   this.someMethod1 = function() {
      var elementBtn = document.getElementById('myBtn');
      elementBtn.onclick = function() { 
         self.someMethod2(); //NOTE self
      };
   };
   this.someMethod2 = function() {
      alert('OK');
   };
}