bootstrap 4 custom select validation code example

Example 1: bootstrap form input select

  

    

      
        +91
        +351
        +1
      
    
    	
    

Example 2: bootstrap input field validation

  

    

      First name
      
      

        Looks good!
      
    
    

      Last name
      
      

        Looks good!
      
    
    

      Username
      

        

          @
        
        
        

          Please choose a username.
        
      
    
  
  

    

      City
      
      

        Please provide a valid city.
      
    
    

      State
      
      

        Please provide a valid state.
      
    
    

      Zip
      
      

        Please provide a valid zip.
      
    
  
  

    

      
      
        Agree to terms and conditions
      
      

        You must agree before submitting.
      
    
  
  Submit form

Example 3: bootstrap email address validation

 
  
 
    Email address 
     
    We'll never share your info. 
  
  

    Password
    
  
  

    
    Check out
  
  Submit