@matt-block/react-recaptcha-v2

React reCAPTCHA v2

React wrapper component for Google's reCAPTCHA v2 service, built with Typescript and Rollup.

Features

• Does not pollute the DOM by cleaning up on unmount (see below)
• Can safely add multiple <ReCaptcha> components in the same page, they will not conflict with each other.
• Typescript definitions (Flow ones are WIP)
• Actively developed

DOM Pollution and Cleanup

<ReCaptcha> will handle all its dirt that is automatically added to the DOM: according to the official reCAPTCHA Documentation, a <script> must be added in the head section of our HTML document. However, it is not explained that, once that script is loaded, more elements will be automatically added to the DOM, outside of out React tree.

Once the component is unmounted, all that has been directly and indirectly added will be removed, leaving a clean document:

Compatibility

This library will always target the most recent React package. If you are using an older release of React, use the correct version of this library from the compatibility table below (if available):

React	Library
>=16.0.0	latest

Installation

Install the package via Yarn or npm:

yarn add @matt-block/react-recaptcha-v2

// or

npm install --save @matt-block/react-recaptcha-v2

That is all, no <script> needs to be added to your main HTML file as this is handled automatically by the component.

Usage

import React, { Component } from "react";
import ReCaptcha from "@matt-block/react-recaptcha-v2";

class MyFormComponent extends Component {
  // other methods and callbacks...

  render() {
    return (
      {/* other components to render... */}
      <ReCaptcha
        siteKey="6LeIxAcTAAAAAJcZVRqyHh71UMIEGNQ_MXjiZKhI"
        theme="light"
        size="normal"
        onSuccess={(captcha) => console.log(`Successful, result is ${captcha}`)}
        onExpire={() => console.log("Verification has expired, re-verify.")}
        onError={() => console.log("Something went wrong, check your conenction")}
      />
    );
  }
}

Props

The only mandatory prop is siteKey which can be obtained from the reCAPTCHA Admin Panel, all other props are optional.

Prop	Type	Default	Description
siteKey	string	undefined	Required. Your site key.
theme	light | dark	light	The color theme of the widget.
size	normal | compact	normal	The size of the widget.
onSuccess	function	undefined	Callback function, executed when the user submits a successful response. The response token is passed to your callback.
onExpired	function	undefined	Callback function, executed when the reCAPTCHA response expires and the user needs to re-verify.
onError	function	undefined	Callback function, executed when reCAPTCHA encounters an error (usually network connectivity) and cannot continue until connectivity is restored. If you specify a function here, you are responsible for informing the user that they should retry.

License

Copyright (c) 2018-present Matei Bogdan Radu.

This source code is licensed under the MIT license found in the LICENSE file in the root directory of this source tree.

Changelog

[1.0.2] - 2018-10-14

Fixed

• Fix criteria for removing hidden divs added by the reCAPTCHA script, as in some cases it would throw a cannot read property of undefined error.