如何循环对象以使顶级键进入吸气剂

Question

after having discovered that getters will allow me to solve a problem, I'd like to convert all my top level keys into getters but was wondering how I can do this. I'm leaning towards looping over Object.keys(obj) as a starting point but would appreciate any method:

const obj = {
  parent: {
    child: {
      aunt: this.aunt  // this will be undefined without getters
    }
  },
  aunt: {
    foo: {
      bar: 1
    }
  },...
}

into:

const obj = {
  get parent() {
    return {
      child: {
        aunt: this.aunt
      }
    }
  },
  get aunt(){
    return {
      foo: {
        bar: 1
      }
    }
  },...
}

Answer 1

You could do it nicely with a map function over the object keys and using the defineProperty over a new object:

var obj_getters = {}

Object.keys(obj).map(function(key) {
  Object.defineProperty(obj_getters, key, {
    get: function() { return obj[key] }
  });
})