Alternative to the try/catch block that offers greater performance benefits in some circumstances and customized functionality. Please be advised, this is an expertimental project, use at your own risk.
The solution leverages the window.onerror event as a means of detecting runtime errors including any errors that you explicitly throw yourself. The event is also able to closely mimic the error suppression of a catch block by returning false from window.onerror, while returning true allows the error to propagate to the browser.
Please refer to http://www.ryanmorr.com/reinventing-the-try-catch-block for more detailed information regarding this project.
The function has two required parameters, the first being a "try" function to test code, the second being a "catch" function which will be invoked and passed an error object if an exception is raised.
tryCatch(function(){
// try something
}, function(error){
// handle error
});Returning false in the "catch" function will allow the error to propagate to the browser. Returning anything else or nothing at all will suppress the error.
This project is dedicated to the public domain as described by the Unlicense.