Error Handling Demo
Question: Can I change the JavaScript error handler without reloading the page?
Answer:
Yes. To change the JavaScript error handler, just set
window.onerror
to the name of the function that will serve as your new error handler.
Here's a demo that lets you test three different error handlers:
the browser's default error handler
an error handler that displays a customized alert box
a "silent" error handler that suppresses all error messages.
- Use the select box to set or change the error handler.
- Click Fire an Error to test the active error handler.
Below is the source code of the error handling functions used in this demo:
function defaultHandler() {return false}
function silentHandler() {return true}
function customHandler(desc,page,line,chr) {
alert(
'JavaScript error occurred! \n'
+'The error was handled by '
+'a customized error handler.\n'
+'\nError description: \t'+desc
+'\nPage address: \t'+page
+'\nLine number: \t'+line
)
return true
}
JavaScripter.net.
Copyright
© 1999-2006, Alexei Kourbatov
