“The try statement executes a block and catches any exceptions that were thrown by the block. The catch clause defines a new variable that will receive the exception object. The throw statement raises an exception. If the throw statement is in a try block, then control goes to the catch clause. Otherwise, the function invocation is abandoned, and control goes to the catch clause of the try in the calling function. The expression is usually an object literal containing a name property and a message property. The catcher of the exception can use that information to determine what to do.”