Question

我想将具有属性（键）的对象映射到装饰器（值）。如果可能的话，我想使用弱地图。我有一个使用字符串的解决方案，除了Weak Maps不接受字符串作为键之外，这很好。这可能是Map或WeakMap吗？

'use strict';

class Accordion {

    constructor() {}

}

let Decorators = new Map();

Decorators.set({nodeName: 'tag-name-here', component: 'accordion'}, (client) => { return new Accordion(client) });

class Client {

    constructor() {

        let key =  {nodeName: 'tag-name-here', component: 'accordion'}
        let decorator;

        if (Decorators.has(key)) {

            decorator = Decorators.get(key)(this);

        }

        console.log(decorator); //undefined, unless I use a string as a key.
    }
}

new Client();

Answer 1

它不起作用，因为密钥的不同实例：{nodeName: 'tag-name-here', component: 'accordion'}每次都会映射到新的内存位置，因此您无法以这种方式获得所需的值。要使其工作，您必须将其设置为新变量，以便您的代码如下所示：

＆＃13;

'use strict';

class Accordion {

    constructor() {}

}

let Decorators = new Map();

const key = {nodeName: 'tag-name-here', component: 'accordion'};
Decorators.set(key, (client) => { return new Accordion(client) });

class Client {

    constructor() {
        let decorator;

        if (Decorators.has(key)) {

            decorator = Decorators.get(key)(this);

        }

        console.log(decorator); // this should return an object
    }
}

new Client();

＆＃13;

ES6将对象映射到装饰器

1 个答案: