Variable as the property name in a JavaScript obje

Question

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• How to use a variable for a key in a JavaScript object literal? 9 answers

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How do I add a property to a Javascript Object using a variable as the name?
Use variable for property name in JavaScript literal?

Is it possible to add a variable as the property name of an object in JavaScript, like this:

var myVar = "name";
var myObject = {
    {myVar}: "value"
};

Answer 1

Yes, but not directly.

var myVar = "name";
var object = {};
object[myVar] = "value";

Answer 2

You can use the [] syntax to use an expression as the property name (compared to the .prop and prop: value syntaxes where they are always treated as strings):

var myObject = {};
var myVar = "name";
myObject[myVar] = "value";

There is no way to use that inside an object literal, though. You have to create the object first and then assign each property separately.

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Edit

With ES6, this is now possible using a ComputedPropertyName, which manifests in the form of the following syntax:

var myVar = "name";
var myObject = {
    [myVar]: "value"
};

Answer 3

Like this?

var myVar = "name";
var myObject = {};

myObject[myVar] = "value";