react-google-recaptcha

What is react-google-recaptcha?

The react-google-recaptcha package is a React component wrapper for Google reCAPTCHA, which helps protect websites from spam and abuse by using advanced risk analysis techniques to differentiate between humans and bots.

What are react-google-recaptcha's main functionalities?

Basic reCAPTCHA Integration

This code demonstrates how to integrate Google reCAPTCHA into a React form. The `ReCAPTCHA` component is used to render the reCAPTCHA widget, and the `handleCaptchaChange` function is called whenever the reCAPTCHA value changes.

import React from 'react';
import ReCAPTCHA from 'react-google-recaptcha';

function MyForm() {
  const handleCaptchaChange = (value) => {
    console.log('Captcha value:', value);
  };

  return (
    <form>
      <ReCAPTCHA
        sitekey="your-site-key"
        onChange={handleCaptchaChange}
      />
      <button type="submit">Submit</button>
    </form>
  );
}

export default MyForm;

Invisible reCAPTCHA

This code demonstrates how to use the invisible reCAPTCHA. The `ReCAPTCHA` component is set to `size="invisible"`, and the reCAPTCHA is executed programmatically when the form is submitted.

import React from 'react';
import ReCAPTCHA from 'react-google-recaptcha';

function MyForm() {
  const recaptchaRef = React.createRef();

  const handleSubmit = (event) => {
    event.preventDefault();
    recaptchaRef.current.execute();
  };

  const handleCaptchaChange = (value) => {
    console.log('Captcha value:', value);
    // Proceed with form submission
  };

  return (
    <form onSubmit={handleSubmit}>
      <ReCAPTCHA
        ref={recaptchaRef}
        sitekey="your-site-key"
        size="invisible"
        onChange={handleCaptchaChange}
      />
      <button type="submit">Submit</button>
    </form>
  );
}

export default MyForm;

reCAPTCHA v3

This code demonstrates how to use reCAPTCHA v3, which does not require user interaction. The `ReCAPTCHA` component is set to `size="invisible"` and an `action` is specified. The reCAPTCHA token is generated and can be verified on the server.

import React from 'react';
import ReCAPTCHA from 'react-google-recaptcha';

function MyForm() {
  const recaptchaRef = React.createRef();

  const handleSubmit = (event) => {
    event.preventDefault();
    recaptchaRef.current.execute();
  };

  const handleCaptchaChange = (token) => {
    console.log('Captcha token:', token);
    // Verify token with your server
  };

  return (
    <form onSubmit={handleSubmit}>
      <ReCAPTCHA
        ref={recaptchaRef}
        sitekey="your-site-key"
        size="invisible"
        onChange={handleCaptchaChange}
        action="submit"
      />
      <button type="submit">Submit</button>
    </form>
  );
}

export default MyForm;

Other packages similar to react-google-recaptcha

react-recaptcha

The react-recaptcha package is another React component for Google reCAPTCHA. It provides similar functionality to react-google-recaptcha but with a slightly different API. It supports both reCAPTCHA v2 and v3, and offers a straightforward way to integrate reCAPTCHA into React applications.

react-recaptcha-v3

The react-recaptcha-v3 package is specifically designed for Google reCAPTCHA v3. It provides a simple and efficient way to integrate reCAPTCHA v3 into React applications, focusing on the invisible reCAPTCHA and token generation for server-side verification.

README

react-google-recaptcha

React component for Google reCAPTCHA v2.

Installation

npm install --save react-google-recaptcha

Usage

All you need to do is sign up for an API key pair. You will need the client key then you can use <ReCAPTCHA />.

The default usage imports a wrapped component that loads the google recaptcha script asynchronously then instantiates a reCAPTCHA the user can then interact with.

Here is a simple working example on codesandbox.io.

Code Example:

import ReCAPTCHA from "react-google-recaptcha";

function onChange(value) {
  console.log("Captcha value:", value);
}

ReactDOM.render(
  <ReCAPTCHA
    sitekey="Your client site key"
    onChange={onChange}
  />,
  document.body
);

Component Props

Properties used to customise the rendering:

Name	Type	Description
sitekey	string	The API client key
onChange	func	The function to be called when the user successfully completes the captcha
theme	enum	optional light or dark The theme of the widget (defaults: light). See example
type	enum	optional image or audio The type of initial captcha (defaults: image)
tabindex	number	optional The tabindex on the element (default: 0)
onExpired	func	optional callback when the challenge is expired and has to be redone by user. By default it will call the onChange with null to signify expired callback.
onErrored	func	optional callback when the challenge errored, most likely due to network issues.
stoken	string	optional set the stoken parameter, which allows the captcha to be used from different domains, see reCAPTCHA secure-token
size	enum	optional compact, normal or invisible. This allows you to change the size or do an invisible captcha
badge	enum	optional bottomright, bottomleft or inline. Positions reCAPTCHA badge. Only for invisible reCAPTCHA

Component Instance API

The component instance also has some utility functions that can be called. These can be accessed via ref.

• getValue() returns the value of the captcha field
• getWidgetId() returns the recaptcha widget Id
• reset() forces reset. See the JavaScript API doc
• execute() programmatically invoke the challenge
  • need to call when using "invisible" reCAPTCHA - example below

Example:

const recaptchaRef = React.createRef();
...
onSubmit = () ={
  const recaptchaValue = recaptchaRef.current.getValue();
  this.props.onSubmit(recaptchaValue);
}
render() {
  return (
    <form onSubmit={this.onSubmit} >
      <ReCAPTCHA
        ref={recaptchaRef}
        sitekey="Your client site key"
        onChange={onChange}
      />
    </form>
  )
}

Invisible reCAPTCHA

Invisible reCAPTCHA

See the reCAPTCHA documentation to see how to configure it.

With the invisible option, you need to handle things a bit differently. You will need to call the execute method yourself.

import ReCAPTCHA from "react-google-recaptcha";

const recaptchaRef = React.createRef();

ReactDOM.render(
  <form onSubmit={() => { recaptchaRef.current.execute(); }}>
    <ReCAPTCHA
      ref={recaptchaRef}
      size="invisible"
      sitekey="Your client site key"
    />
  </form>,
  document.body
);

Advanced usage

Global properties used by reCaptcha

lang: By default google reCaptcha infers the user's interface language. In order to overwrite the language and update the translation for the reCaptcha widget, you can create a global variable configuring the desired language via lang.

useRecaptchaNet: If google.com is blocked, you can set useRecaptchaNet to true so that the component uses recaptcha.net instead.

removeOnUnmount: If you plan to change the lang dynamically, removeOnUnmount should probably be true. This unloads the google recaptcha script on componetWillUnmount to allow for a new google recaptcha script to load next time the reCAPTCHA component is used to facilitate a new language if needed.

Example global properties:

window.recaptchaOptions = {
  lang: 'fr',
  useRecaptchaNet: true,
  removeOnUnmount: false,
};

ReCaptcha loading google recaptcha script manually

You can also use the barebone components doing the following. Using that component will oblige you to manage the grecaptcha dep and load the script by yourself.

import { ReCAPTCHA } from "react-google-recaptcha";

const grecaptchaObject = window.grecaptcha // You must provide access to the google grecaptcha object.

render(
  <ReCAPTCHA
    ref={(r) => this.recaptcha = r}
    sitekey="Your client site key"
    grecaptcha={grecaptchaObject}
  />,
  document.body
);

Notes on Requirements

At least React@16.4.1 is required due to forwardRef usage in the dependency react-async-script.

Notes

Pre 1.0.0 and React < 16.4.1 support details in 0.14.0.