how to pass object property to same object method code example

Example 1: function inside object javascript

var obj = {
  func: function(a, b) {
    return a * b;
  }
};

obj.func(3, 6); // 18

Example 2: object inside object javascript

var obj = {
  prop1: 5,
  obj2: {
    prop1: [3, 6, 3],
    prop2: 74,
    prop3: {
      str: "Hello World"
    }
  }
};

console.log(obj.obj2.prop3.str); //output: "Hello World"