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It protects the code and run the program even after throwing an exception. Exception handling is used to handle the exceptions. We can use try catch block to protect the code. Catch block is used to catch all types of exception.
In a nutshell, the try-catch is a code block that can be used to deal with thrown exceptions without interrupting program execution. In other words, you can "try" to execute a block of code, and "catch" any exceptions that are thrown.
yeah. Since Exception is the base class of all exceptions, it will catch any exception.
You can do this by using window.onerror method.
window.onerror = function myErrorHandler(errorMsg, url, lineNumber) {
alert("Error occured: " + errorMsg);//or any message
return false;
}
You can either use window.onerror, or (amazingly!) bind to the 'error' event properly:
window.onerror = function (message, file, line, col, error) {
alert("Error occurred: " + error.message);
return false;
};
window.addEventListener("error", function (e) {
alert("Error occurred: " + e.error.message);
return false;
})
If you want to track JavaScript errors, you can try Atatus. I work at Atatus.
In addition to
window.onerror = function (message, file, line, col, error) {
alert("Error occurred: " + error.message);
return false;
};
window.addEventListener("error", function (e) {
alert("Error occurred: " + e.error.message);
return false;
})
You can also catch all the errors fired inside a promise callback (.then()) listening for unhandledrejection event
window.addEventListener('unhandledrejection', function (e) {
alert("Error occurred: " + e.reason.message);
})
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