Implementing JavaScript Object Properties Private

When the assignment prototype is prototype, the function executes immediately to assign the value, and return exposes the method that you want to call externally to achieve the public/private effect.

1   　　 functionCalculator () {2          This. num = 102;3     }4Calculator.prototype =function () {5Add =function(x, y) {6Console.log (Subtract (2,1))7             returnX + y + This. Num;8         },9 TenSubtract =function(x, y) { One             returnX-y; A         } -         return { - Add:add, the sub:subtract -         } -     } (); -  +     varCalculator =NewCalculator (); -Console.log (Calculator.add ()) +Console.log (Calculator.sub)

Implementing JavaScript Object Properties Private