Convert string value to object property name [duplicate]

Question

Possible Duplicate:
How to convert string as object's field name in javascript

I can do this:

var objPosition = {};
objPosition.title = "whatever";

But I'm getting 'title' dynamically, and want to use about a half dozen strings so obtained to assign the half dozen properties to the object. I've tried eval and several other schemes that seem to have the same problem, but have come up empty so far.

I have:

var txtCol = $(this).text();
txtCol = $.trim(txtCol);

and I want the value of txtCol to be a property name.

Any ideas?

mellamokb · Accepted Answer · 2012-08-28 17:53:20Z

62

Use ['propname']:

objPosition[txtCol] = "whatever";

Demo: http://jsfiddle.net/hr7XW/

answered Aug 28, 2012 at 17:53

mellamokb

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KooiInc · Accepted Answer · 2019-11-27 10:05:01Z

15

use bracket notation: objPosition['title'] = "whatever";

so:

var objPosition = {}, ttl = 'title';
objPosition[ttl] = 'whatever';

[edit 11/2019: es20xx]

let objPosition = {};
const ttl = 'title';
// [...]
objPosition = {...objPosition, [ttl]: "whatever"};
console.log(objPosition);

edited Nov 27, 2019 at 10:05

answered Aug 28, 2012 at 17:53

KooiInc

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Comments

Shreedhar · Accepted Answer · 2012-08-28 17:53:36Z

4

you can also set the object's key like this

var property = "title"
objPosition[property] = "something";

answered Aug 28, 2012 at 17:53

Shreedhar

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Comments

Some Guy · Accepted Answer · 2012-08-28 17:54:00Z

3

Use the bracket notation like this:

objPosition["title"] = "Whatever";

answered Aug 28, 2012 at 17:54

Some Guy

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