CODEWITHSUNDEEP
html
Marcus Höglund
Marcus Höglund

Reputation: 16801

Format number in an HTML5 input tag

This is my input

<input type="number" id="inputNumbers" step="0.01" ></input>

Is it possible to only allow users to enter numbers that match the pattern '0.00', like the way I declare it in the step attribute, without using JavaScript?

Example: If the user types '1.23' and then tries to enter a new number, decimal or comma it can't and the number stays at '1.23'.

If there's not a way to match the step attribute, Is it possible to only allow one decimal in the number?

Upvotes: 9

Views: 88519

Answers (3)

UniCoder
UniCoder

Reputation: 3233

It can be achieved using javascript with corner case handling using toLocaleString()

function getChange(){
  // 48 - 57 (0-9)
  var str1 = valueRef.value;
  if((str1[str1.length-1]).charCodeAt() < 48 || (str1[str1.length-1]).charCodeAt() > 57){
    valueRef.value = str1.substring(0,str1.length-1 );
    return;
  } 

 // t.replace(/,/g,'')
  let str = (valueRef.value).replace(/,/g,'');

  let value = +str;

  valueRef.value = value.toLocaleString();
}

Working Codepen Demo Link

Upvotes: -1

nouseforname
nouseforname

Reputation: 748

I think you can try something like this:

input type="number" name="number" pattern="([0-9]{1,3}).([0-9]{1,3})" title="Must contain a decimal number">

see here

Added Plunkr: Plunker

Upvotes: 6

Ctc
Ctc

Reputation: 801

function inputLimiter(e,allow) {
    var AllowableCharacters = '';

    if (allow == 'custom'){AllowableCharacters=' 1234567890.';}


    var k = document.all?parseInt(e.keyCode): parseInt(e.which);
    if (k!=13 && k!=8 && k!=0){
        if ((e.ctrlKey==false) && (e.altKey==false)) {
        return (AllowableCharacters.indexOf(String.fromCharCode(k))!=-1);
        } else {
        return true;
        }
    } else {
        return true;
    }
    
    }
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.2.22/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<input type="text" id="NameCharacters" onkeypress="return inputLimiter(event,'custom')" value="" maxlength="4" /></p>

In Javascript. But this was as far as I got, will just leave this here for awhile, need to handle other stuffs.

Upvotes: -4

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