Why can’t back ticks be used in JavaScript objects

Question

Why are back ticks for object properties invalid syntax? For example, this is valid:

const test = {
  "test1": "test2"
}

So why can’t it have back ticks instead?

const test = {
  `test1`: "test2"
}
//throws unexpected token error

It would be really helpful if back ticks could be used like this, but we can’t. Is there a simple alternative, or maybe this works in some browsers?

Answer 1

You need to put it into brackets like this because it's evaluated at runtime.

const test = {
  [`test1`]: "test2"
}

As @Amadan pointed out in the comment, you can use any expression as a property key by putting it into brackets.

Answer 2

You can write like this:

const key = `test1`
const test = { [key]: 'test2' }