Throwing a Javascript error on button click event

Question

I have a Javascript function that's fired on the onclick event of a button on my webform. It's possible for invalid parameters to be passed to the function, in which case I'd like to throw an error so that the browser can report to the user that something went wrong, and that they might want to check their configuration settings. However, throwing an error causes a postback as the return false; statement is never reached.

In this situation, what sort of feedback can/should I give to the user? I don't particularly want to throw up an alert as I'd prefer something more subtle. Any/all suggestions appreciated.

Did you try with Exception Handling in Javascript? Try/catch — Pankaj
– Pankaj, Commented Apr 2, 2012 at 8:45

Pankaj · Accepted Answer · 2012-04-02 08:50:22Z

1

Try Catch Finally in JavaScript Using exception handling you can throw the error as well as return the control as false based on your certain conditions

answered Apr 2, 2012 at 8:50

Pankaj

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antonjs · Accepted Answer · 2012-04-02 09:06:04Z

0

1) For handling runtime errors:
use try/catch/finally
Reference: MDN try...catch

2) For the feedback:
Instead of using the alert you can use a Dialog animation with fade in and after two seconds fade out effect.

For example look to this demo:
http://sandbox.scriptiny.com/javascript-fading/

edited Apr 2, 2012 at 9:06

answered Apr 2, 2012 at 8:59

antonjs

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