Javascript Signature Pad

Official website and documentation is here

Compatible with Vanilla JavaScript, LemonadeJS, React, Vue or Angular.

The LemonadeJS JavaScript Signature Pad is a responsive component that simplifies signature capture in web applications. It is compatible with Vanilla JavaScript, React, Vue, and Angular frameworks, allowing users to capture signatures using either mouse or touch input. With convenient methods for loading and retrieving signatures, developers can easily create solutions that empower users to sign documents and securely store their signatures.

Features

• Lightweight: The lemonade signature pad is only about 2 KBytes;
• Reactive: Any changes to the underlying data are automatically applied to the HTML, making it easy to keep your grid up-to-date;
• Integration: It can be used as a standalone library or integrated with any modern framework;

Getting Started

You can install using NPM or using directly from a CDN.

npm Installation

To install it in your project using npm, run the following command:

$ npm install @lemonadejs/signature

CDN

To use data grid via a CDN, include the following script tags in your HTML file:

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lemonadejs/dist/lemonade.min.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/@lemonadejs/signature/dist/index.min.js"></script>

Configuration

Quick example with Lemonade

import Signature from "@lemonadejs/signature";

export default function Component() {
    const self = this;
    self.width = 400;
    self.height = 200;
    self.value = [];

    return `<Signature
        value="{{self.value}}"
        width="{{self.width}}"
        height="{{self.height}}"
        instructions="Please sign this document" />`;
}

ReactJS Signature Pad Plugin

import React, { useRef } from "react";
import Signature from "@lemonadejs/signature/dist/react";

export default function App() {
    const signature = useRef();
    const width = 400;
    const height = 200;
    const value = [];
    return (
        <>
            <Signature ref={signature} value={value} width={width} height={height} instructions="Please sign this document" />
        </>
    );
}

VueJS Signature Pad Plugin

<template>
  <Signature ref="signature" :value="[]" :width="400" :height="200" instructions="Please sign this document" />
</template>

<script>
import Signature from '@lemonadejs/signature/dist/vue';

export default {
  name: 'App',
  components: {
      Signature,
  },
};
</script>

Web-Component Signature Pad

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/lemonadejs/dist/lemonade.min.js"></script>
<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/@lemonadejs/signature/dist/index.min.js"></script>
<lm-signature width="400" height="200"></lm-signature>

Attributes

| Attribute | Type | Description | |---------------|----------|----------------------------------------------------------------------| | value? | Array | The value represents the painted point's position. | | width? | Number | The width of the signature pad. | | height? | Number | The height of the signature pad. | | instructions? | String | The instruction text. It appears at the bottom of the signature pad. | | line? | Number | The size of each painted point. | | disabled? | Boolean | Signature is disabled if true. | | getValue | Function | Gets the value array. | | setValue | Function | Sets the internal state value. | | getImage | Function | Gets the image based on the value. |

Events

| Event | Description | |-----------|-----------------------------------------| | onchange? | When the value of the component changes | | onload? | When the component completes loading |

License

The LemonadeJS signature pad is released under the MIT.

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