How to convert string stored in variable of javascript directly to object property?

Question

var str="firstname";
var obj={};
obj.str="john";

I want to create property firstname but i want to create it by the variable name like obj.str not like obj.firstname here problem is obj.str create property str not firstname. i want to create property like this because it will later help me to create property by joining two string .

You should be able to use the `obj[str]` notation – sbrass Jul 31 '18 at 17:36 — sbrass, Jul 31 '18 at 17:36

score 1 · Accepted Answer · answered Jul 31 '18 at 17:38

1

Try like this with [] notation. See MDN when to use dot(.) or bracket([]) notation for javascript.

var str = "firstname";
var obj = {};
obj[str] = "john";
console.log(obj);

answered Jul 31 '18 at 17:38

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How to convert string stored in variable of javascript directly to object property?

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