Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
319 views
in Technique[技术] by (71.8m points)

javascript - ES6: How to access a static getter from an instance

How can i access a static getter from an instance of the class that implements that getter?

for example, i have this class:

class Component {
  static get isComponent() { return true; }

  constructor() {}
}

const c = new Component();

how can i call from "c" "isComponent" of "Component" class? I read around and all I found is something like that:

Object.getPrototypeOf(c).isComponent

but this is not working on my case because there is no "isComponent" method in Component prototype object. The above code works if I write the class like this:

Component.prototype.isComponent = () => { return true; }

but this is not the way i would like to write classes. What am I missing? tnx

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

statics become properties of the constructor function, which you can access on an instance via the constructor property:

console.log(c.constructor.isComponent);

class Component {
  static get isComponent() { return true; }

  constructor() {}
}

const c = new Component();
console.log(c.constructor.isComponent); // true

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...