Creating an object with dynamic keys [duplicate]

Question

Here is a function building an object dynamically:

function onEntry(key, value) {
  console.log(key) // productName
  console.log(value) // Budweiser

  const obj = { key: value }
  console.log(obj) // { key: "Budweiser" }
}

Expected output is

{ productName: "Budweiser" }

But property name is not evaluated

{ key: "Budweiser" }

How to make property name of an object evaluated as an expression?

` var tmp = {};tmp[k]=v;`

dandavis
– dandavis

2015-06-22 22:00:08 +00:00
Commented Jun 22, 2015 at 22:00 — dandavis
– dandavis, Commented Jun 22, 2015 at 22:00
You should use bracket notation as described here.

3_humped_CAML
– 3_humped_CAML

2015-06-22 22:00:21 +00:00
Commented Jun 22, 2015 at 22:00 — 3_humped_CAML
– 3_humped_CAML, Commented Jun 22, 2015 at 22:00
Please use the search before you ask a new question.

Felix Kling
– Felix Kling

2015-06-22 22:13:19 +00:00
Commented Jun 22, 2015 at 22:13 — Felix Kling
– Felix Kling, Commented Jun 22, 2015 at 22:13

kube · Accepted Answer · 2018-12-11 20:40:38Z

3

Create an object, and set its key manually.

var obj = {}
obj[key] = value

Or using ECMAScript 2015 syntax, you can also do it directly in the object declaration:

var obj = {
  [key] = value
}

edited Dec 11, 2018 at 20:40

answered Jun 22, 2015 at 22:00

kube

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