how to use variable instead of static in calling object in js

Question

is something like this is make able i tried to put the var in [] but it didn't worked also can any one help please thank you

const obj = { car : "a" , bus: "b" };
    const x = "car" ;
obj.x = "some value"

Answer 1

Looking for computed property names?

const obj = { car : "a" , bus: "b" };
    const x = "a" ;
obj[x] = "some value"