Why is this causing an error?
I have a jquery json ajax call and inside my success function I have the following check:
if(data['error'] === 1) {
$return_feedback.html(data['error_msg']);
}
For some reason I can't figure it out, although right now, I'm getting an error:
'Uncaught TypeError: Cannot read property 'error' of null'
And it refers to the line if (data ['error'] above.
So I looked at what my script is returning and it's true - no data. But shouldn't you just skip that if statement? Or should I check if the data value exists before calling the if statement?
Thank you for your time.
+3
willdanceforfun
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3 answers
data is zero
use this:
if (!data){
//throw exception or handle the problem
}
else if(data['error'] === 1) {
$return_feedback.html(data['error_msg']);
}
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pylover
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Yes, you have to check if the data is true:
if(data && data['error'] === 1) {
$return_feedback.html(data['error_msg']);
}
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Paulpro
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You can use something like this, which should work without error:
if(typeof data!=='undefined' && data['error'] === 1) {
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stewe
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