Filtering table multiple columns

Question

I used w3School code for my page and it works fine but it only filters one column, don’t know how create loops but hopping there is easier solution.

    td =         


        

Answer 1

Borrowing code from this post I am able to filter on 2 columns using the || (Or) operator. However, I'd like to be able to filter using the && (And) operator.

I have been unsuccessful in my multiple attempts. I could use some help.

  

  

    
Firstname
    
Lastname
    
Gender
    
Department
  
  
  

  

    
John
    
Doe
    
Male
    
Sales
  
  

    
Mary
    
Moe
    
Female
    
Service
  
  

    
July
    
Dooley
    
Female
    
Service
  
  

    
Anja
    
Ravendale
    
Female
    
Engineering
  
  

    
Thomas
    
Dubois
    
Male
    
Sales
  
  

    
Deidre
    
Masters
    
Female
    
Sales
  
  

    
Sean
    
Franken
    
Male
    
Engineering