When should you use try/catch in JavaScript?

Question

When I\'m developing normal web application with JavaScript, the try/catch statement is not needed usually. There\'s no checked exception, File IO or database conne

Answer 1

One scenario I find try/catch/finally useful is with deeply nested objects where a null can pop up at any level. for example, consider this:

var something = one.two.three.four.five;

to perform this "get" with 100% safety one would have to write a bit of verbose code:

if(one && one.two && one.two.three && one.two.three.four)
   something = one.two.three.four.five;

Now imagine the variable names are realistic and longer and you quickly get a very ugly code if statement.

I tend to use try/catch/finally to simplify this when I don't care about any "else" scenarios and just want the object or not:

var something;
try { something = one.two.three.four.five; }
catch { something = "default"; }
finally { doSomething(something); }