CODEWITHSUNDEEP
javascriptjquery
Nida
Nida

Reputation: 1702

Input should allow numbers and dash character

I have written jquery for allowing numbers and dash - from being entered

$('.no-special-characters').keydown(function(e){  
  if (e.keyCode >= 48 && e.keyCode <= 57 || e.keyCode == 45) {
    return true; 
  }  else {
    return false;
  } 
});

It does not work accordingly. It allows only numbers to be accepted.

Upvotes: 2

Views: 3886

Answers (4)

drews
drews

Reputation: 146

e.keyCode = 109 is '-' on numpad

e.keyCode = 189 is '-' in alphabate keybord key on chrome

e.keyCode = 173 is '-' in alphabate keyboard key on firefox & on chrome 173 keycord is Mute On|Off

Source

Maybe this helps you, because using only e.keyCode == 189 (as some answers say) wont work in Firefox.

You can see, what keyCode your key presses return here: Link

Edit: You can also use regular expressions. Then there is no need to add keyCodes for different browsers:

$('.no-special-characters').keypress(function(e){  
    var txt = String.fromCharCode(e.which)
    var pattern = /^[0-9\-]+$/;
    if (!(pattern.test(txt) || e.keyCode == 8)){
            return false;
    }
})

JSFiddle

Upvotes: 0

prasanth
prasanth

Reputation: 22510

Try this

Updated with backspace support

Allow the keycode of 189

$('.no-special-characters').keydown(function(e) {
   var key =  e.keyCode|e.which;
      console.log(key) //check the key value in your console.log
      if (key >= 48 && key <= 57 || key == 45 || key == 189 ||key == 8){
          return true;
        } else {
          return false;
        }
      });
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input class="no-special-characters">

Upvotes: 2

Shiladitya
Shiladitya

Reputation: 12161

Here you go with one more solution 

$('.no-special-characters').keydown(function(e){  
  if ((e.keyCode >= 48 && e.keyCode <= 57) || e.keyCode == 189) {
    return true; 
  } else {
    return false;
  } 
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input class="no-special-characters" type="text" />

Usually combine the keyCode from 48 to 57 & then the next keyCode condition.

Hope this will help you.

Upvotes: 1

Bhargav Chudasama
Bhargav Chudasama

Reputation: 7171

try this code

$('.no-special-characters').keydown(function(e) {
  if (e.keyCode >= 48 && e.keyCode <= 57 || e.keyCode == 189) {
    return true;
  } else {
    return false;
  }
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input class="no-special-characters">

Upvotes: 2

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