To catch all JavaScript unhandled exceptions, use window.error. The onerror event handler provides three pieces of information to identify the exact nature of the error −
- Error message − The same message that the browser would display for the given error
- URL − The file in which the error occurred
- Line number− The line number in the given URL that caused the error
Example
You can try to run the following code to catch unhandled exceptions −
<html> <head> <script> <!-- window.onerror = function (msg, url, line) { alert("Message : " + msg ); alert("url : " + url ); alert("Line number : " + line ); } //--> </script> </head> <body> <p>Click the following to see the result:</p> <form> <input type = "button" value = "Click Me" onclick = "myFunc();" /> </form> </body> </html>