CODEWITHSUNDEEP
javascripterror-handling
JoshL
JoshL

Reputation: 1499

How do I capture and resume global errors in javascript?

I am writing a testing suite for javascript and need a way to capture any JS errors and continue processing the rest of the page.

I can't use window.onerror since return true stops the browser from proceeding. I tried using a try {} catch block but the function is run in a window setTimeout() for various reasons and that seems to mess up the try catch block.

For example, I do something like this:

 function test(msg, fn) {
    $('#output').text(msg);
    try {
       fn.apply(this);
    } catch(e) {
       document.write('error'+e);
    };
}

and then call it like this

 test('trying this', function() { setTimeout('afunction()',100); });

but if afunction() fails the error is not being caught.

Does anyone have any idea on a solution or global error handler that allows me to resume?

Upvotes: 0

Views: 1489

Answers (1)

pimvdb
pimvdb

Reputation: 154848

There is window.onerror, which you can attach a handler function to. If that function returns true, the error is suppressed: http://jsfiddle.net/pimvdb/qAv9J/2/.

window.onerror = function(e) {
    console.log(e);
    return true;
};

Upvotes: 2

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