The JavaScript throw statement is used to send an exception to a block of code that will handle the exception.
try
{
if(/^\d+$/.test(2))
document.write('Positive integer validated');
else
throw('Invalid');
}
catch(strErrorMsg)
{
document.write(strErrorMsg);
}
The preceding example defines a try block, in which a validation for a positive integer occurs. If the validation is successful, a success message is printed. If the validation is not successful, however, the throw statement is used to send the error message to the catch block.
Related articles:
JavaScript Try Catch Finally
