如何使用javascript或jquery为json添加键和值

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

Answer 1

Like this

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

Answer 2

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)