如何在ES6中将对象添加到原型中

Question

class Classname {
    constructor(args) {
        // code
    }

    // this method is added to Classname.prototype
    function_name(argument) {
        // body...
    }

    //how to add objects similarly to prototype
}

有没有办法将对象添加到Classname.prototype？

Answer 1

您可以使用getter和setter在类体内的原型上定义属性。但这有点冗长。

例如。

＆＃13;

＆＃13;

const obj = {
  name: 'Shared'
}
class A {
  get a() {
    return obj
  }
}

const a1 = new A

console.log(A.prototype.hasOwnProperty('a'))
console.log(a1.hasOwnProperty('a'))
console.log(a1.a)

＆＃13;

＆＃13;

＆＃13;

Answer 2

Classname.prototype.myObject = {};

或者

Classname.prototype.myObject = Object.assign({ foo: 'bar'}, { bar: 'baz' }, anotherObject)

例如

const User = function() {};
User.prototype.info = Object.assign({ foo: 'bar' }, { bar: 'baz' });

const bob = new User();
bob.info; // => { foo: 'bar', bar: 'baz' }