how to add key and a value to a json using javascript or jquery

Question

i have a json variable like this

var jsondata={"all":"true"}

i want to push another key and value to the jsondata. after that my jsondata have to be like this.

{"all":"true","FDamount":"false","DDamount":"true"}

how to do that??? i tried jsondata.push({"FDamount":"false"}) and jsondata.push("FDamount:false"). both of these method is not working.

thank you

You do not seem to use JSON anywhere? Those are just simple object literals (and no arrays, btw) — Bergi
– Bergi, Commented Dec 22, 2012 at 14:14

senK · Accepted Answer · 2012-12-22 11:10:04Z

34

Like this

jsondata.FDamount = 'false';
// or
jsondata['FDamount'] = 'false';

answered Dec 22, 2012 at 11:10

senK

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Comments

Cyril N. · Accepted Answer · 2012-12-22 14:13:23Z

9

Simply do this :

jsondata['FDamount'] = 'false';
jsondata['DDamount'] = 'true';

Or this :

jsondata.FDamount = 'false';
jsondata.DDamount = 'true';

By the way, you define boolean as string, the correct way should be :

jsondata['FDamount'] = false;
jsondata['DDamount'] = true;

To push a little bit further, you can use jQuery.extend to extend the original var, like this :

jQuery.extend(jsondata, {'FDamount': 'false', 'DDamount': 'true'});
// Now, jsondata will be :
{"all":"true","FDamount":"false","DDamount":"true"}

jQuery.extend is available when using jQuery (of course), but I'm sure you can find similar methods in other libraries/frameworks.

(I'm using single quotes, but double quotes works too)

edited Dec 22, 2012 at 14:13

answered Dec 22, 2012 at 11:09

Cyril N.

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3 Comments

Can Ürek Over a year ago

How can i do that for each element? I need add new key and value for each element.

Cyril N. Over a year ago

What do you mean by "each element" ?

Can Ürek Over a year ago

"Each element" is each item when parse to an object your Json Data you can see items. I want add an key with value for each item in your Json structure.

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