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throw
The command throw to handle errors in JavaScript generates un'eccezzione within a try.
Let's see an example of code:
var x = prompt ("Enter a number between 5 and 10 ","");
try
{
if (x> 10)
throw "Errore1";
else if (x <5)
throw "Errore2";
}
catch (er)
{
if (er == "Errore1")
alert ("Error! not include more than 10");
if (er == "Errore2")
alert ("Error! not enter a number less than 5");
}
Execute the code and try to type a number in the range indicated NOT ...
throw allows, in essence, to have more control in the program flow and generate error messages more precise.
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