'How can I create an iOS style PIN/password box with CSS?

I want to create a html5 input that looks like the iOS enter Pin (on the lock screen).... with 4 input boxes.

How do i achieve this?

enter image description here

I tried the following:

1) Created a normal input box.

2) Removed its borders.

3) Placed the above image as the background of the input box.

4) And added some letter spacing.

Problem is: As i type the first 3 characters, it fits in the boxes:

enter image description here

But when i type the 4th character, the characters move towards the left and hence it appears as below:

enter image description here

What can I do to fix this ?

Any other better approach ??

EDIT:

Ok based on the below answers, I modified the approach to have 4 input boxes. And on keyup event for each input box, I change the focus to next input box.

This works well on browser. But does not work on the device (iPhone 5). What is the problem ?

It is a Sencha Touch app packaged using Cordova.

SOLVED:

Need to disable <preference name="KeyboardDisplayRequiresUserAction" value="false" />

htmlcss


Solution 1:[1]

Instead of using background-image for this purpose, use four input boxes with their type set to password, and than use jQuery to achieve some more user friendliness, if you don't need that functionality of auto focusing to next field you can simply omit the script out and achieve your style..

Demo

input[type=password] {
    padding: 10px;
    border: 1px solid #ddd;
    width: 50px;
    height: 50px;
    text-align: center;
    font-size: 30px;
}

jQuery (Optional for auto focus functionality)

$("input").keyup(function() {
    if($(this).val().length >= 1) {
      var input_flds = $(this).closest('form').find(':input');
      input_flds.eq(input_flds.index(this) + 1).focus();
    }
});

Solution 2:[2]

No need for jQuery, much cleaner IMO.

HTML

<form id="ios">
    <input type="password" maxlength="1" />
    <input type="password" maxlength="1"/>
    <input type="password" maxlength="1"/>
    <input type="password" maxlength="1"/>
</form>

CSS

form#ios input[type=password]{
    height: 50px;
    width: 40px;
    text-align: center;
    font-size: 2em;
    border: 1px solid #000;
}

Demo

http://jsfiddle.net/jerryhuangme/e9yhr/

Solution 3:[3]

To keep the style clean, I would suggest you to create 4 input boxes.

Write a small script to focus the next input box when user enters character in the current input box.

Solution 4:[4]

$("input[name*=pin]").keyup(function(e) {
  if($(this).val().length == 1) {
    $(this).attr('type', 'password');
    var input_fields = $(this).closest('form').find('input[name*=pin]');
    input_fields.eq(input_fields.index(this) + 1).focus();
  }
  if (e.keyCode==8 && e.currentTarget.name !== 'pin01') {
    $(this).attr('type', 'number');
    var input_fields = $(this).closest('form').find('input[name*=pin]');
    input_fields.eq( input_fields.index(this) - 1 ).attr('type', 'number').focus(); 
  }
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<form action="" class="form-pin">
  <input type="number" maxlength="1" name="pin01" class="input-pin" pattern="\d*" />
  <input type="number" maxlength="1" name="pin02" class="input-pin" pattern="\d*" />
  <input type="number" maxlength="1" name="pin03" class="input-pin" pattern="\d*" />
  <input type="number" maxlength="1" name="pin04" class="input-pin" pattern="\d*" />
</form>

Solution 5:[5]

 <input type="tel" maxlength="1" tabindex="1" class="display-otp-box" data-key="otp1">
 <input type="tel" maxlength="1" tabindex="2" class="display-otp-box" data-key="otp2">
 <input type="tel" maxlength="1" tabindex="3" class="display-otp-box" data-key="otp3">
 <input type="tel" maxlength="1" tabindex="4" class="display-otp-box" data-key="otp4">


$('.display-otp-box').on('keyup', function (e) {
  var key = event.keyCode || event.charCode;
        
  /* for backspace, focus will move to the previous box */ 
  if( key === 8 || key === 46 ){
     $(this).prev('input').focus();
     return;
  }
  $(this).next('input').focus();
 });
  • type="tel" on the input will make sure the numeric keypad appears when using on the phone
  • next input will be focused automatically with the help of tabindex.

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution Source
Solution 1 Mr. Alien
Solution 2 Community
Solution 3 aBhijit
Solution 4 eozzy
Solution 5

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