oop - Is Module pattern in javascript worth using? -


afaik understand module pattern in javascript, used create namespace variables , functions become private namespace save them inadvertent manipulation. e.g. consider following code: 

var istouchdevice = 'ontouchstart' in document.documentelement; //some code... if(istouchdevice == 1) {   alert("you using touchscreen device"); }

in above code if mistake had skipped 1 equal sign in if condition if(istouchdevice = 1) pollute whole code , further conditions check value of istouchdevice give false result. afai module pattern supposed solve these kind of issues. e.g. can make istouchdevice readable read-only thing. think modular code be: 

var useragent = function() {                 var touchdevice = 'ontouchstart' in document.documentelement;     function istouchdevice() {     return touchdevice; }             return { iftouchdevice: istouchdevice };                 }();

now if want check whether device touch screen do:

if(useragent.iftouchdevice()) or if(useragent.iftouchdevice() == 1)

now inadverdantly change useragent.iftouchdevice() such if(useragent.iftouchdevice = 1), touchdevice remain immutable , give correct value. far good. question is,

  • we using if(useragent.iftouchdevice() == 1) everywhere check touch screen device , think module pattern save us. if useragent.iftouchdevice has been assigned incorrect value if conditions checking touch device still go wrong. have made touchdevice immutable still useragent.iftouchdevice not immutable , acts global variable can polluted. advantage of module pattern?


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