react-grecaptcha-v3 v0.4.5

Google Invisible ReCaptcha components for React based application

Keep website performance high while prioritizing security.

Please read the documentation about Google reCAPTCHA on their official website before installation. Obtain a siteKey (your reCaptcha token) before using this library.

Key Features 🎯

• Prevent degrading PageSpeed Insights score with power of injectionDelay property.
• Lazy siteKey in case it is provided by back-end API.
• Lazy load reCaptcha assets for key points of your application. Function provided by useSkipInjectionDelay hook allows to ignore injectionDelay
• Clear versioning with help of Changeset.
• Highly tested code with Typescript and Jest.
• Confirmed Provenance by npm. It guarantees transparency in a library release process.

How to install?

• yarn add react-grecaptcha-v3 for Yarn.
• pnpm add react-grecaptcha-v3 for pnpm
• npm install react-grecaptcha-v3 for npm

Components documentation

ReCaptchaProvider

react-grecaptcha-v3 provides a ReCaptchaProvider provider component that should be used to wrap around your components.

ReCaptchaProvider's responsibility is to load the necessary reCaptcha script and provide access to reCaptcha to the rest of your application.

Usually, your application only needs one provider. You should place it as high as possible in your React tree. It's to make sure you only have one instance of Google Recaptcha per page and it doesn't reload unecessarily when your components re-rendered.

Same thing applied when you use this library with a framework such as Next.js or React Router and only want to include the script on a single page. Try to make sure you only have one instance of the provider on a React tree and to place it as high (on the tree) as possible.

Property types for ReCaptchaProvider

type Props = {
    siteKey: string | null;
    useRecaptchaNet?: boolean = false;
    enterprise?: boolean = false;
    scriptProps?: = {
        nonce?: string;
        defer?: boolean = true;
        async?: boolean = true;
        appendTo?: 'head' | 'body';
        id?: string = 'rusted_labs_react_recaptcha_v3';
    };
    injectionDelay?: number;
};

A short description for each property

React Hook: useGoogleReCaptcha

There is only one way to call Google reCaptcha. Hook useExecuteReCaptcha.

The function returned by useGoogleReCaptcha returns promise with resolved reCaptcha token result. This token is used to validate protection score on your server-side and decide whether user is bot or not. Please note, in case your parent component tree not wrapped by ReCaptchaProvider a console error will be shown and event will be ignored.

Use the hook as provided in the following example.

import { ReCaptchaProvider, useExecuteReCaptcha } from 'react-grecaptcha-v3'

const GoogleReCaptchaValidatorComponent = () => {
    const executeRecaptcha = useExecuteReCaptcha()

    // Create an event handler so you can call the verification on button click event or form submit
    const handleReCaptchaVerify = useCallback(async () => {
        const token = await executeRecaptcha('userAction')
        // Do whatever you want with the token
    }, [executeRecaptcha])

    // You can use useEffect to trigger the verification as soon as the component being loaded
    useEffect(() => {
        handleReCaptchaVerify()
    }, [handleReCaptchaVerify])

    return <button onClick={handleReCaptchaVerify}>Verify recaptcha</button>
}

ReactDOM.render(
    <ReCaptchaProvider siteKey="[Your recaptcha key]">
        <GoogleReCaptchaValidatorComponent />
    </ReCaptchaProvider>,
    document.getElementById('app')
)

useSkipInjectionDelay

"I need my Google reCAPTCHA to be loaded now, regardless of the injectionDelay property. What should I do?"

There is a way to ignore the injectionDelay and load reCAPTCHA assets immediately. The useSkipInjectionDelay hook returns a callback that accomplishes this. See the following usage example.

import { ReCaptchaProvider, useExecuteReCaptcha } from 'react-grecaptcha-v3'

const GoogleReCaptchaValidatorComponent = () => {
    const forceRecaptchaLoad = useSkipInjectionDelay()

    // Create an event handler so you can call the verification on button click event or form submit
    const handleReCaptchaVerify = useCallback(async () => {
        forceRecaptchaLoad() //Load google recaptcha NOW!
        const token = await executeRecaptcha('someVeryImportantAction')
        // Do whatever you want with the token
    }, [executeRecaptcha])

    // You can use useEffect to trigger the verification as soon as the component being loaded
    useEffect(() => {
        handleReCaptchaVerify()
    }, [handleReCaptchaVerify])

    return <button onClick={handleReCaptchaVerify}>Verify recaptcha</button>
}

ReactDOM.render(
    <ReCaptchaProvider siteKey="[Your recaptcha key]">
        <GoogleReCaptchaValidatorComponent />
    </ReCaptchaProvider>,
    document.getElementById('app')
)

In our example, we have shown an important action that requires a token as fast as possible. However, keep in mind that for invisible reCAPTCHA, such a case can be suspicious, leading to a worse score. It is better to prepare reCAPTCHA at an earlier stage.

For example, you can call useSkipInjectionDelay with some action triggered by the user earlier, when you do not need a token immediately.