How can I push a JS variable into json

Question

Sorry JS is not my language :-(

I should build such a json value:

var input = { 'to': { 'info@example.com' : 'Jhon Doe' }

I have read a ton of docs but i am stuck whith:

var userEmail = 'info@example.com'
var input = { 'to': { userEmail : 'Jhon Doe' }}
console.log(input);
// result-> userEmail: "Jhon Doe"

so, how can push a JS variable into json ?

Answer 1

var input = { 'to': { [userEmail] : 'Jhon Doe' }}

[userEmail] will turn to the value of userEmail.

Alternatively:

var input = { 'to': {} };
input[userEmail] = 'Jhon Doe';