Dynamic object property names?

Question

How can I make this happen:

var name = otherObject.name; //"string"
var o = { 
            name : otherObject
        };
alert(o["string"].name);

Jordan Running · Accepted Answer · 2018-04-09 13:41:36Z

38

Use bracket notation instead.

var name = otherObject.name;
var o = {};
o[name] = otherObject;

Or, in modern JavaScript:

var o = {
  [name]: otherObject,
};

edited Apr 9, 2018 at 13:41

answered Nov 25, 2009 at 17:16

Jordan Running

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1 Comment

Patrick Roberts Over a year ago

Since this is a decent duplicate target, it might be helpful to be more specific than "modern JavaScript". This syntax was introduced in ECMAScript 2015, and is called a computed property name. Here's the link to the specification's ComputedPropertyName expression in case you want to cite the specification directly as well.

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