Javascript Life Saver of the Week – uniqueID

31. March 2017

Simple way to make sure you are assigning unique IDs to a series of elements.

var seedNum = 1;
function uniqueID(myKey, seedNum){
     var key = myKey + seedNum;
     if (document.getElementById(key) != null){
         return uniqueID(myKey, ++seedNum);
     }
     else{
         return key;
     }
 }

var seedNum = 1;

function uniqueID(myKey, seedNum){

var key = myKey + seedNum;

if (document.getElementById(key) != null){

return uniqueID(myKey, ++seedNum);

}

else{

return key;

}

USAGE

uniqueID('state-',seedNum);

1	uniqueID('state-',seedNum);

If you want to do IETF RFC-4122 compliant Universally Unique Identifiers (UUID), checkout Pure UUID.

Seems to be all about unique IDs this week ;)

Enjoy coding…

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Alexander

I am a full-stack developer. My expertise include:

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