Object.assign can`t find declared variable

Question

I feel like my problem is really easy to solve, but I cannot see it. I have simple thing to do, get myObject from another function and store this in my storage object. For this task I created storageHandler function. Everything works fine, but Object.assign is not reaching my 'ID' that I declared in this function earlier. This is weird because I don't know how to tell my function that 'ID' is variable, not a string. I just expect it to be {1212313: {...}} but instead it gives me {ID: {...}}.
Someone have any idea how to fix it?

  let  storage = {}

  const myObject =  {       
  ID: '1223424525221',
  name: 'Thomas',
  mail: 'example@example.com'
  }


  storageHandler = data => {
    const {ID} = data;
    
    Object.assign(storage, {ID: data})
    console.log(storage)
  }

  storageHandler(myObject)

If you are setting a single property, why not just `storage[ID] = data`? Seems like you are over complicating this. — Taplar, Dec 11 '20 at 19:53
@Taplar yea, I just didn`t know about this way, thank you for telling it. — Tsived, Dec 11 '20 at 20:00
Also a duplicate of https://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json — Taplar, Dec 11 '20 at 20:05

score 1 · Accepted Answer · answered Dec 11 '20 at 19:53

1

That's because in javascript this

a = { b: 1 };

is the same as

a = { "b": 1 };

You should change the Object.assign() for something like this

storage[ID] = data;

answered Dec 11 '20 at 19:53

cape_bsas

638
5
13

mr hr · Answer 2 · 2020-12-11T19:55:54.267

You are using string as a property name. Use computed property name like [ID] instead of ID. Computed property allows you to have an expression be computed as a property name on an object.

let storage = {};

const myObject = {
  ID: '1223424525221',
  name: 'Thomas',
  mail: 'example@example.com',
};

storageHandler = (data) => {
  const { ID } = data;

  Object.assign(storage, { [ID]: data });
  console.log(storage);
};

storageHandler(myObject);

score 0 · Answer 3 · answered Dec 11 '20 at 19:52

0

You should use the value of ID as key of object using [].

Object.assign(storage, {[ID]: data})

answered Dec 11 '20 at 19:52

michael

4,053
2
12
31

Object.assign can`t find declared variable

3 Answers3