Automatically Format your Numbers & Currencies using jquery

In this article, we will understand the how to automatically format your number and currencies using jquery. Auto format currency is an input field. In this text is automatically formatted with commas and cursor is placed back where user left off after formatting and cursor moving to the end of the input.

Following is the examples.

Example 1:

<! DOCTYPE html>  
<html>  
    <head>  
        <meta http-equiv = "Content-Type"  
            content = "text/html; charset=UTF-8" />  
        <title> Example of Automatically Format your Numbers & Currencies using jquery </title>  
        <meta name = "description"/>  
        <meta content = "width=800, initial-scale=1"  
        name = "viewport" />  
<script src =  
"https://code.jquery.com/jquery-3.5.1.min.js">  
        </script>               
        <script src =  
"https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js"> </script>          
<script src = "https://code.jquery.com/jquery-3.3.1.min.js"> </script>
<style>
html {
    position: relative;
    padding: 0;
    margin: 0;
    overflow: hidden;
    background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #333 ), color-stop(100%,black));
    background: -webkit-radial-gradient(center, ellipse cover, #333 0%, black 100%);    
    height: 100%;
    width: 100%;
    text-align: center;
    font-family: sans-serif;
}
body {
    position: relative;
    padding: 0;
    margin: 0;
    overflow: hidden;
    background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #333 ), color-stop(100%,black));
    background: -webkit-radial-gradient(center, ellipse cover, #333 0%, black 100%); 
    height: 100%;
    width: 100%;
    text-align: center;
    font-family: sans-serif;
}
h1 {
  color: white;
  font-size: 30px;
}
h2 {
  color: white;
}
*, *:before, *:after {
  box-sizing: inherit;
}
body {
  background: #f5f5f5;
  color: #333;
  font-family: arial, helvetica, sans-serif;
  font-size: 32px;
}
h1 {
  font-size: 32px;
  text-align: center;
}
p {
  font-size: 20px;
  line-height: 1.5;
  margin: 40px auto 0;
  max-width: 640px;
}
pre {
  background: #eee;
  border: 1px solid #ccc;
  font-size: 16px;
  padding: 20px;
}
form {
  margin: 40px auto 0;
}
label {
  display: block;
  font-size: 24px;
  font-weight: bold;
  margin-bottom: 10px;
}
input {
  border: 2px solid #333;
  border-radius: 5px;
  color: #333;
  font-size: 32px;
  margin: 0 0 20px;
  padding: .5rem 1rem;
  width: 100%;
}
button {
  background: #fff;
  border: 2px solid #333;
  border-radius: 5px;
  color: #333;
  font-size: 16px;
  font-weight: bold;
  padding: 1rem;
}
button:hover {
  background: #333;
  border: 2px solid #333;
  color: #fff;
}
.main {
  background: #fff;
  border: 5px solid #ccc;
  border-radius: 10px;
  margin: 40px auto;
  padding: 40px;
  width: 80%;
  max-width: 700px;
}
body {
background: linear-gradient(90deg, rgba(19,20,23,1) 0%, rgba(30,31,38,1) 100%, rgba(30,31,38,1) 100%);
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}
</style>
<body>
<div class = "main">
  <h1> Example of Auto Formatting Currency </h1>
  <form method = "post" action = "#">
  <label for = "currency-field"> Enter Amount </label>
  <input type = "text" name = "currency-field" id = "currency-field" pattern = "^\$\d{1,3}(,\d{3})*(\.\d+)?$" value = "" data-type = "currency" placeholder = "$1,000,000.00">
  <button type = "submit"> Submit </button>
</form>  
 <pre> data-type = "currency" </pre>  
</div>
$("input[data-type='currency']").on({
    keyup: function() {
      formatCurrency($(this));
    },
    blur: function() { 
      formatCurrency($(this), "blur");
    }
});
function formatNumber(n) {
  return n.replace(/\D/g, "").replace(/\B(?=(\d{3})+(?!\d))/g, ",")
}
function formatCurrency(input, blur) {  
  var input_val = input.val();
    if (input_val === "") { return; }
    var original_len = input_val.length;
  var caret_pos = input.prop("selectionStart");
      if (input_val.indexOf(".") >= 0) {
    var decimal_pos = input_val.indexOf(".");
    var left_side = input_val.substring(0, decimal_pos);
    var right_side = input_val.substring(decimal_pos);
    left_side = formatNumber(left_side);
    right_side = formatNumber(right_side);
    if (blur === "blur") {
      right_side += "00";
    }
        right_side = right_side.substring(0, 2);
    input_val = "$" + left_side + "." + right_side;
  } else {
    input_val = formatNumber(input_val);
    input_val = "$" + input_val;
    if (blur === "blur") {
      input_val += ".00";
    }
  }
    input.val(input_val);
  var updated_len = input_val.length;
  caret_pos = updated_len - original_len + caret_pos;
  input[0].setSelectionRange(caret_pos, caret_pos);
}
$("input[data-type='currency']").on({
    keyup: function() {
      formatCurrency($(this));
    },
    blur: function() { 
      formatCurrency($(this), "blur");
    }
});
function formatNumber(n) {
  return n.replace(/\D/g, "").replace(/\B(?=(\d{3})+(?!\d))/g, ",")
}
function formatCurrency(input, blur) {
  var input_val = input.val();
    if (input_val === "") { return; }
    var original_len = input_val.length;

  var caret_pos = input.prop("selectionStart");    
  if (input_val.indexOf(".") >= 0) {
    var decimal_pos = input_val.indexOf(".");
    var left_side = input_val.substring(0, decimal_pos);
    var right_side = input_val.substring(decimal_pos);
    left_side = formatNumber(left_side);
    right_side = formatNumber(right_side); 
    if (blur === "blur") {
      right_side += "00";
    }
    right_side = right_side.substring(0, 2);
    input_val = "$" + left_side + "." + right_side;
  } else {
    input_val = formatNumber(input_val);
    input_val = "$" + input_val;
        if (blur === "blur") {
      input_val += ".00";
    }
  }
  input.val(input_val);
  var updated_len = input_val.length;
  caret_pos = updated_len - original_len + caret_pos;
  input[0].setSelectionRange(caret_pos, caret_pos);
}
</script>
</body>
</html>

Explanation:

In the above example, we created an automatically format your currency field using jquery.

Output:

Following is the output of this example.

Automatically Format your Numbers & Currencies using jquery

Example 2:

<! DOCTYPE html>  
<html>  
    <head>  
        <meta http-equiv = "Content-Type"  
            content = "text/html; charset=UTF-8" />  
        <title> Example of Automatically Format your Numbers & Currencies using jquery </title>  
        <meta name = "description"/>  
        <meta content = "width=800, initial-scale=1"  
        name = "viewport" />  
<script src =  
"https://code.jquery.com/jquery-3.5.1.min.js">  
        </script>               
        <script src =  
"https://ajax.googleapis.com/ajax/libs/jqueryui/1.11.2/jquery-ui.min.js"> </script>          
<script src = "https://code.jquery.com/jquery-3.3.1.min.js"> </script>
<style>
html {
    position: relative;
    padding: 0;
    margin: 0;
    overflow: hidden;
    background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #333 ), color-stop(100%,black));
    background: -webkit-radial-gradient(center, ellipse cover, #333 0%, black 100%);    
    height: 100%;
    width: 100%;
    text-align: center;
    font-family: sans-serif;
}
body {
    position: relative;
    padding: 0;
    margin: 0;
    overflow: hidden;
    background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #333 ), color-stop(100%,black));
    background: -webkit-radial-gradient(center, ellipse cover, #333 0%, black 100%); 
    height: 100%;
    width: 100%;
    text-align: center;
    font-family: sans-serif;
}
h1 {
  color: red;
  font-size: 30px;
}
h2 {
  color: red;
} 
</style>
<body ng-app = "currencyModule">
<h1> Example </h1>
  <h2> Automatically Format your Numbers & Currencies using jquery </h2>
  <div ng-controller = "currencyController">
    <label> <strong> Enter value: </strong> <input type = "text" ng-model = "currencyData" /> </label> <br />
    <strong> Filtered data (default): </strong> {{currencyData | customCurrency}} <br />
    <strong> Filtered data (with parameters): </strong> {{currencyData | customCurrency:"PLN":".":" ":2:false}} <br />
  </div>
<script>
angular.module("currencyModule", [])
  .controller("currencyController", function ($scope, $filter) {
  })
  .filter("customCurrency", function (numberFilter) {
    function isNumeric(value) {
      return (!isNaN(parseFloat(value)) && isFinite(value));
    }
    return function (inputNumber, currencySymbol, decimalSeparator, thousandsSeparator, decimalDigits, prefixWithSymbol) {
      if (isNumeric(inputNumber)) {
        currencySymbol = (typeof currencySymbol === "undefined") ? "$" : currencySymbol;
        decimalSeparator = (typeof decimalSeparator === "undefined") ? "." : decimalSeparator;
        thousandsSeparator = (typeof thousandsSeparator === "undefined") ? "," : thousandsSeparator;
        decimalDigits = (typeof decimalDigits === "undefined" || !isNumeric(decimalDigits)) ? 2 : decimalDigits;
        prefixWithSymbol = (typeof prefixWithSymbol === "undefined") ? true : prefixWithSymbol;
        if (decimalDigits < 0) decimalDigits = 0;
        var formattedNumber = numberFilter(inputNumber, decimalDigits);
        var numberParts = formattedNumber.split(".");
                numberParts[0] = numberParts[0].split(",").join(thousandsSeparator);        var result = numberParts[0];
        if (numberParts.length == 2) {
          result += decimalSeparator + numberParts[1];
        }
        return (prefixWithSymbol ? currencySymbol + " " : "") + result + (prefixWithSymbol ? "" : " " + currencySymbol);
      } else {
        return inputNumber;
      }
    };
  });
</script>
</body>
</html>

Explanation:

In the above example, we created an automatically format your currency field using jquery.

Output:

Following is the output of this example.

Example 3:

<html lang = "en">
<head>
    <meta name = "viewport" content = "width=device-width, initial-scale=1.0">
    <title> Example of Automatically Format your Numbers & Currencies using jquery </title>
     <link href = "https://fonts.googleapis.com/css2?family=Roboto+Mono:wght@400;500&display=swap" rel = "stylesheet">
<style>
* {
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: "Roboto Mono",monospace;
}
body {
    height: 100vh;
    background: linear-gradient(
        135deg,
        #a283fc,
        #6637ed
    ), #fafcfe;
    background-size: 100% 32%;
    background-repeat: no-repeat;
}
body {
    position: relative;
    padding: 0;
    margin: 0;
    overflow: hidden;
    background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%, #333 ), color-stop(100%,black));
    background: -webkit-radial-gradient(center, ellipse cover, #333 0%, black 100%); 
    height: 100%;
    width: 100%;
    text-align: center;
    font-family: sans-serif;
}
h1 {
  color: red;
  font-size: 30px;
}
h2 {
  color: red;
}
.wrapper {
    width: 80vmin;
    position: absolute;
    transform: translate(-50%,-50%);
    top: 50%;
    left: 50%;
}
.container {
    width: 100%;
    background-color: #ffffff;
    box-shadow: 15px 15px 40px rgba(1,9,31,0.05);
    padding: 40px 30px;
    border-radius: 5px;
    display: grid;
    grid-template-columns: 3fr 1fr;
    grid-gap: 20px;
}
input {
    height: 40px;
    outline: none;
    border: none;
    color: #37373a;
    font-size: 16px;
    border-bottom: 1px solid #37373a;
}
button {
    background-color: #6637ed;
    border: none;
    color: #ffffff;
    outline: none;
    height: 40px;
    padding: 0 20px;
    cursor: pointer;
    border-radius: 3px;
}
p {
    background-color: #ffffff;
    box-shadow: 12px 12px 30px rgba(1,9,31,0.05);
    padding: 20px 10px;
    text-align: center;
    margin-top: 30px;
    color: #37373a;
    border-radius: 5px;
}
p span {
    font-weight: bold;
}
</head>
</style>
<body>
  <h1> Example </h1>
  <h2> Automatically Format your Numbers & Currencies using jquery </h2>
    <div class = "wrapper">
        <div class = "container">
            <input type = "text" id = "amount" placeholder = "Enter the amount here">
            <button id = "btn"> Format </button>
        </div>
        <p id = "output1">
            <span> Indian Rupees: </span>
        </p>
        <p id = "output2">
            <span> US Dollars: </span>
        </p>
        <p id = "output3">
            <span> Japanese Yen: </span>
        </p>
    </div>  
<script>
let btn = document.getElementById("btn");
let rupees = document.getElementById("output1");
let dollars = document.getElementById("output2");
let yen = document.getElementById("output3");

let formatter1 = new Intl.NumberFormat(
    "en-IN",
    {style: "currency", currency: "INR"}
);
let formatter2 = new Intl.NumberFormat(
    "en-US",
    {style: "currency", currency: "USD"}
)
let formatter3 = new Intl.NumberFormat(
    "ja-JP",
    {style: "currency", currency: "JPY"}
)
btn.addEventListener("click", ()=>{
    let amount = document.getElementById("amount").value;
    rupees.innerHTML = `<span>Indian Rupees:</span>${formatter1.format(amount)}`;
    dollars.innerHTML = `<span>US Dollars:</span>${formatter2.format(amount)}`;
    yen.innerHTML = `<span>Japanese Yen:</span>${formatter3.format(amount)}`;
});
</script>
</body>
</html>

Explanation:

In the above example, we created an automatically format your currency field using jquery.

Output:

Following is the output of this example.