Why does JSLint tell me to use “=== undefined” instead of “typeof … === 'undefined'”?

Question

I coded the following:

showTitles = (typeof showTitles !== \'undefined\') ? showTitles : \'Y\';
showSelectGroup = (typeof showSelectGroup !== \'undefined\')          


        

Answer 1

Probably by using

showTitles = (showTitles === undefined) ? 'Y' : showTitles;
showSelectGroup = (showSelectGroup === undefined) ? 'Y' : showSelectGroup;

jslint has no issues with that (assuming showTitles and showSelectGroup are declared with var)

However, I'd write it as

var showTitles = showTitles || 'Y';
var showSelectGroup = showSelectGroup || 'Y';