如何调用 javascript 中通过原型创建的方法？

Question

我收到未捕获的类型错误：question1.pushIt 不是函数

function Question(){
  this.question = [];
}

function Push(){
}

Push.prototype.pushIt = function(array,text){
  return array.push(text);
}

Push.prototype = Object.create(Question.prototype);

var question1 = new Question();
question1.pushIt(this.question,"is 1 = 1 ?");// error

Answer 1

我想您可能正在寻找类似 this 的内容。

JavaScript:

function Push() {
    this.pushIt = function(array, text){
        return array.push(text);   
    }
};

function Question() {
    this.question = [];
}

Question.prototype = new Push();

var question1 = new Question();
question1.pushIt(question1.question,"is 1 = 1 ?");

console.log(question1.question); // ["is 1 = 1 ?"]
console.log(question1 instanceof Question); // true
console.log(question1 instanceof Push); // true

如何调用 javascript 中通过原型创建的方法？

how to call methods created via prototypes in javascript?

javascript

object

prototypal-inheritance