Using Functions Try, Catch and Finally

Handling errors and exceptions in JavaScript is a very tricky task for developers. A single error or exception could mean something is wrong in the general coding of the application. This would prompt developers to seek the source of the problem and provide solutions as fast as possible.

Unfortunately, digging deep and making some changes there will require precious time and resources – all of this is done just to deal with one exception and/or error in the JavaScript and Ajax based applications.

But there is another way in dealing with these exceptions and errors. The application has already been laid out and making some changes on the actual coding could be costly and time consuming. Instead of making some changes, developers could add functions to deal with this problem faster.

One of those solutions that developers could consider in handling errors and exceptions is the combination of try/catch/finally functions. It’s a very simple combination but could easily handle errors and exceptions.

In gist, the combination of try/catch/finally tries to deal with the exceptions by providing an alternative route in dealing with the function. The “try” function will provide an option for the browser in case it can’t read the said command.

The function “catch” will further provide data for the browser so that it could stream the required data on the client side. The function “finally” will basically inform the browser on the remaining functions it should execute in case the presented options will or will not work.

The tricky part of try/catch/finally is the independence of each function. Catch and finally are two functions that could be implemented with other functions especially with data manipulation. The function “try” on the other hand will never be able to properly execute without catch and finally. The function “try” should exist either with catch and/or finally. This is actually logical since the initial function will never work since data manipulation and the conclusion of the function comes from another source.

Unfortunately, try/catch/finally is not the complete answer in dealing with errors and exceptions. There are certain errors and exceptions that require different functions. For example, syntax error cannot be used with the said function.

Developers will have some trouble in establishing try/catch/finally to answer syntax errors since it directly deals with data instead of functions. The function that could deal with this problem is the onError event. This type of function could easily provide options in case some problems in syntax occur.

Exceptions that are also related to data cannot be handled by try/catch/finally. Developers should use object detection when they are currently facing challenges on data exceptions. Through object detection, exceptions could be monitored and options will be provided.

The try/catch/finally functionality is a great function in itself. They provide a slew of options for the browser on how the function will be executed. The best thing about this function is that it could work well in different browsers. With the addition of onError event and object detection, developers should have a powerful application ready to deal with errors and exceptions.