How to validate Google Analytics tracking id using a JavaScript function
google-analytics, javascript, regex
Solution
GA ID does not have a fixed number of digits in it. Also, There have been legacy ids that started with `MO` or `YT` etc. For your purposes, the correct regex could be something like:
/(UA|YT|MO)-\d+-\d+/i.test(id)
This works for following scenarios:
UA-1234-12
YT-1234-12
MO-1-1
UA-1234-1
ua-1-1
UA-1234- // Invalid
UA--1 // Invalid
Also, To check this in jsfiddle: http://jsfiddle.net/c4mkH/1/
Problem
I need to validate a Google Analytics tracking ID. So I created a simple function but my RegEx must be wrong because it just returns false everytime. I'm not sure if there is a set amount of digits in the middle or at that end of a Google Analytics ID so was just trying to just look for at least one digit. JavaScript Function: ``` function validateGA(id) { var regexp = /ua-\d+-\w\d+/; return regexp.test(id); } ``` Tested with `validateGA('UA-12345-12');` but just keep returning false. JSFiddle: http://jsfiddle.net/g9yLr/