How to correctly determine the source of traffic?

Question

JavaScript

Good afternoon!
Tell me how to determine that the user came from a specific source?
I found out by the "poke" method (so I can be wrong) that:

• referrer containing 'www.google.com' - google search
  
• referrer containing 'market.yandex.ru' - yandex market
  
• referrer containing 'yandex.ru/click' - Yandex search
  
• referrer containing something else - a referral link (so far the rest are not interested, but most likely the definition is also for the main domain)
  

• get parameter using 'gclid' - google ad
  
• get parameter using 'yclid' - Yandex advertising
  

Am I correct? Are there any pitfalls with the definition of the source?

Answer 1

the referrer is not passed when going https -> http
so the first three options will not work in 99% of cases.
Well, other transitions from https sites will also not be visible.

Answer 2

$('#header_havigation li a').each(function () {.....

li has no href attribute....

Answer 3

And what did you write in the .active class?

Answer 4

Generally the server part usually is engaged in it.
PS href is the full address, use pathname