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Stackfindover
Stackfindover

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How to create signature pad in html | signature pad JavaScript

Hello guys, today I am going to show you how to create a signature pad using HTML CSS & JavaScript, in this video, I will create a JavaScript signature pad using the signature pad JavaScript library.

JavaScript signature pad step by step

Step 1 — Creating a New Project

In this step, we need to create a new project folder and files(index.html, style.css) for creating an awesome responsive website footer. In the next step, you will start creating the structure of the webpage.

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Step 2 — Setting Up the basic structure

In this step, we will add the HTML code to create the basic structure of the project.

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>How to create signature pad in html</title>
    <link rel="stylesheet" href="style.css">
</head>
<body>

</body>
</html> 
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This is the base structure of most web pages that use HTML.

Add the following code inside the <body> tag:

<div class="flex-row">
       <div class="wrapper">
           <canvas id="signature-pad" width="400" height="200"></canvas>
       </div>
       <div class="clear-btn">
           <button id="clear"><span> Clear </span></button>
       </div>
   </div>
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Step 3 — Adding Styles for the Classes

In this step, we will add styles to the section class Inside style.css file

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300&display=swap');
* {
    padding: 0;
    margin: 0;
    font-family: 'Poppins', sans-serif;
}
body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
    width: 100vw;
    background: #ececec;
    overflow: hidden;
}
.flex-row {
    display: flex;
}
.wrapper {
    border: 1px solid #4b00ff;
    border-right: 0;
}
canvas#signature-pad {
    background: #fff;
    width: 100%;
    height: 100%;
    cursor: crosshair;
}
button#clear {
    height: 100%;
    background: #4b00ff;
    border: 1px solid transparent;
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}
button#clear span {
    transform: rotate(90deg);
    display: block;
}
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Step 4 — Adding signature pad javascript library and code

In this step, we will add some javascript code to generate canvas and add the signature pad library.

<script src="https://cdnjs.cloudflare.com/ajax/libs/signature_pad/1.3.5/signature_pad.min.js" integrity="sha512-kw/nRM/BMR2XGArXnOoxKOO5VBHLdITAW00aG8qK4zBzcLVZ4nzg7/oYCaoiwc8U9zrnsO9UHqpyljJ8+iqYiQ==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
<script>
       var canvas = document.getElementById("signature-pad");

       function resizeCanvas() {
           var ratio = Math.max(window.devicePixelRatio || 1, 1);
           canvas.width = canvas.offsetWidth * ratio;
           canvas.height = canvas.offsetHeight * ratio;
           canvas.getContext("2d").scale(ratio, ratio);
       }
       window.onresize = resizeCanvas;
       resizeCanvas();

       var signaturePad = new SignaturePad(canvas, {
        backgroundColor: 'rgb(250,250,250)'
       });

       document.getElementById("clear").addEventListener('click', function(){
        signaturePad.clear();
       })
   </script>
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#Final Result

Top comments (3)

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dariusz_ca8d profile image
Dariusz Zakrzewski

is this working on iphone? I seem to be getting some problems implementing signature field on ios safari - with the url bar in the bottom the js seems to be broken has anybody else had this issue too? similar to this form:
piotnetforms.com/docs/signature-fi...

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prabhukadode profile image
Prabhu

Nice

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ldiazortiz profile image
ldiazortiz

Great 👍🏽

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