And there is another input without any value and has and if of minBid.

2.   <form id="placeBid" action="/add-new-bid/{{$product->id}}" method="Post">
3.                 {!! csrf_field() !!}
4. <input type="submit" id="bidSubmit" class="btn btn-success" value="Siūlyti kainą" style="float: right" />
6.                 <div style="overflow: hidden; padding-right: .5em;">
7.                     <input type="hidden" value="{{$product->bid_price}}" id="jsBidPrice">
8.    <input type="number" name="bid" class="minBid form-control" min="{{$product->bid_price}}" onkeyup="this.value = minmax(this.value, 0, 100)" placeholder="min. suma {{$product->bid_price}} €" style="width: 100%;" />
9. </div>​
10.   </form>

I want to check if user typed less than jsBidPrice. If it is then just return an alert. It works. But when I inspect field element and delete the "min" attribute from the input when I type 6 the ajax works and sents info to DB and I want to do that it should not work when the minBid is not equal or more then jsBidPrice. This is my if:

2. $(function(){
3. 
   
4. $('#placeBid').on('submit',function(e){
5.     $.ajaxSetup({
6.         headers: {
7.             'X-CSRF-Token': $('meta[name="csrf_token"]').attr('content')
8.         }
9.     });
10.     e.preventDefault(e);
11. 
    
12.         if($("#jsBidPrice").val() <= $(".minBid").val()){
13. 
    
14.         $.ajax({
15. 
    
16.         method:"POST",
17.         url: $("#placeBid").attr("action"),
18.         data:$(this).serialize(),
19.         dataType: 'text',
20.         success: function(data){  
21.            $('.minBid').val(0);
22.            $("#bidSubmit").attr("disabled", true);
23. 
    
24.         },
25.         error: function(data){
26.             console.log("request failed");
27.         }
28.     })
29.     }
30.         else {
31.             alert('Too low.');
32.         }
33.     });
34. });