onerror problem

[josh]

Hi

if I try to attach onerror event via addEventListener

window.addEventListener("error", myError, false) it does not work
as it pass to myError only the event object but not the three
parameters
error message, url, line number as in: window.onerror = myError
infact if I assing it via window.onerror = myError it works!

any idea?

[Randy Webb]

josh said the following on 9/13/2007 7:03 AM:

Hi

if I try to attach onerror event via addEventListener

window.addEventListener("error", myError, false) it does not work
as it pass to myError only the event object but not the three
parameters
error message, url, line number as in: window.onerror = myError
infact if I assing it via window.onerror = myError it works!

any idea?

Novel idea: Use window.onerror=myError instead of addEventListener and
all is fine with the world.......

--
Randy
Chance Favors The Prepared Mind
comp.lang.javascript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[Stevo]

Randy Webb wrote:

josh said the following on 9/13/2007 7:03 AM:

>infact if I assing it via window.onerror = myError it works!

Novel idea: Use window.onerror=myError instead of addEventListener and
all is fine with the world.......

All is fine with the world as long as nothing else was already assigned
as the handler. If it was, then it's nuked.

[Randy Webb]

Stevo said the following on 9/13/2007 10:08 AM:

Randy Webb wrote:

>josh said the following on 9/13/2007 7:03 AM:

>>infact if I assing it via window.onerror = myError it works!

Novel idea: Use window.onerror=myError instead of addEventListener and
all is fine with the world.......

All is fine with the world as long as nothing else was already assigned
as the handler. If it was, then it's nuked.

If it was, and you add another that handles the errors a different way
or is written to specific errors, then one of them is nuked anyway.
Adding onload events when one already exists is one scenario where I can
see it mattering, but with onerror it just seems perverse to want more
than one function handling them.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javascript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[RobG]

On Sep 13, 9:03 pm, josh <[e-mail]:

Hi

if I try to attach onerror event via addEventListener

window.addEventListener("error", myError, false) it does not work
as it pass to myError only the event object but not the three
parameters
error message, url, line number as in: window.onerror = myError
infact if I assing it via window.onerror = myError it works!

any idea?

You can try the following (works in IE and Firefox at least):

function addWindowOnerror(fn) {
var oFn;
if (typeof window.onerror == 'function') {
oFn = window.onerror;
window.onerror = function(a, b, c){
oFn(a, b, c);
fn(a, b, c);
}
} else {
window.onerror = fn;
}
}
--
Rob