jQuery exception handling

Question

Is there any way I could catch any uncaught exception in javascript? I mean, all my \"dangerous\" code are in try-catch blocks. But what about exceptions that I don\'t handl

Answer 1

You can use the window.onerror event handler, it's not supported in Opera though and it may not fire in certain situations (thanks @Josh).

It's not really wise to do this, however, it will make bug finding a nightmare for a start. It's generally best to make sure your code is error free in the first place :-) You certainly shouldn't need to use try... catch statements very often in JavaScript and you definitely shouldn't be using empty catch blocks.

I can use try-catch blocks here, but they will caught exceptions that occured during the event binding procedure, not during the event handling.

You can also add try/catch blocks to inner scopes:

// Outer
try { 
    $(document).ready(function(){})
}
catch (e) {
    /* Error handling */
}

// Inner
$(document).ready(function(){
    try { /* ... */ } catch (e) { /* Error handling */ }
});