在下面的代码中,我需要调用子类Worker
中的"private"方法run
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);
目前,如果我调用run
方法,我会得到一个Error: run is not defined!
对不起,不能这样做,除非People
类(应该称为Person
)使该方法可用。
一种常见的做法是使"私有"方法以下划线开头。它并没有100%授予任何安全性,但它至少给了其他开发人员一个暗示,表明它是私有的。
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
};
}