I have the following JSON Object:
[{"id":"123","username":"test"}]
I want to parse username using javascript so i did this
var content = '[{"id":"123","username":"test"}]
obj = JSON.parse(content)
alert(obj.username)
I get an alert: undefined
I've tried parsing the JSON without the [ ] and it worked
For example:
var content = '{"id":"123","username":"test"}'
obj = JSON.parse(content)
alert(obj.username)
My question would be how would i parse the JSON with the [ ] tags around it? Thank you!
Nat Ritmeyer
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asked Oct 24, 2012 at 19:45
mormaii2
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2 Answers 2
That's because [] makes it an array. Try alert(obj[0].username).
If you changed your JSON to look like this...
[ {"id":"123","username":"test"}, {"id":"456","username":"test 2"}]
Then alert(obj[1].username) would be test 2, and alert(obj[0].username) would be test.
answered Oct 24, 2012 at 19:46
Mike Park
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mormaii2
Thank you! I had tried using alert(obj[1].username) but it didn't work. I was wondering why it didn't. Thank you very much!
The undefined error you get in the first case is because the JSON represents an ARRAY with a single object in it. In order to access the username you would need alert(obj[0].username)
answered Oct 24, 2012 at 19:47
Mike Brant
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