setInterval，对象方法只运行一次

Question

以下结构

function SomeObject() {}

SomeObject.prototype.repeatWhat = function() {
    setInterval(this.what, 1);
}

SomeObject.prototype.what = function() {
    console.log("what?");
}

在控制台中只生成一个"what?"，为什么不能永久运行？

我称之为

var someInstance = new SomeObject();
someInstance.what();

Answer 1

您没有在代码中调用repeatWhat

var someInstance = new SomeObject();
someInstance.what();
someInstance.repeatWhat(); //I've added this