How to assign name of type object of object as variable using TypeScript/JavaScript

Question

How I can assign name of the object as a variable $var1 using TypeScript

const $var1 = 'email';
data = [{
          name: 'John',
          $var1: 22 
       }];

Answer 1

Use JS computed property

const $var1 = 'email';
data = [{
          name: 'John',
          [$var1]: 22 
       }];

Answer 2

You can insert variable as key using Object[variable] as follows.

const $var1 = 'email';

// -- First Way
const data = [{
  name: 'John',
}];
data[0][$var1] = 22;
console.log(data);

// -- Second Way
const result2 = [{
  name: 'John',
  [$var1]: 22
}];
console.log(result2);