从javascript中的“父”对象调用“私有”方法

Question

in the following code, i need call the "private" method run in the sub class Worker

function Person(scope, ...) {
  scope.name = "Juan";

  var run = function() {
     console.log(scope.name + " is running");
  };
}

function Worker(scope, ...) {
  Person.call(this, scope, ...);

  var jumpAndRun = function() {
     console.log(scope.name + " is jumping");
     run(); // how to call this
  };
}

Worker.prototype = Object.create(People.prototype);

currently if i call run method i get an Error: run is not defined!

Answer 1

Sorry, can't do it, unless the People class (which should be called Person ) makes that method available.

A common practice is to make "private" methods start with an underscore. It does not 100% grant any security, but it at least gives other developers a hint that it is meant to be private.

function Person(scope, ...) {
  scope.name = "Juan";

  var run = function() {
     console.log(scope.name + " is running");
  };

  this._run = run;
}

function Worker(scope, ...) {
  Person.call(this, scope, ...);

  var jumpAndRun = function() {
     console.log(scope.name + " is jumping");
     this._run(); // how to call this
  };
}