Question

i’m tryin to identify the error i get in a javascrip function in my webpage, so i added

function guardarMisDatos() throws Exception {
try{
...
} catch (Exception e){
alert("error: ", e);
}

but when i open the page, the chrome web console gives me error at

function guardarMisDatos() throws Exception {

and the error type is “Uncaught syntaxerror: unexpected identifier”
where is the error? is it a correct way to check way the function is not fired on the first click?

Answer 1

Remove “throws Exception” and the catch reference to “Exception”. To know what kind of exception it is, look at the e.name property, it’ll be one of six things:

• EvalError – An error in the eval() function has occurred.
• RangeError – ut of range number value has occurred.
• ReferenceError – An illegal reference has occurred.
• SyntaxError – A syntax error within code inside the eval() function has occurred. All other syntax errors are not caught by try/catch/finally, and will trigger the default browser error message associated with the error. To catch actual syntax errors, you may use the onerror event.
• TypeError – An error in the expected variable type has occurred.
• URIError – An error when encoding or decoding the URI has occurred (ie: when calling encodeURI()).

These aren’t constants, they’re the actual string, as in if (e.name.toString()=="TypeError") There are a lot of other good things on the error object too, read more at http://www.javascriptkit.com/javatutors/trycatch2.shtml