Securing React Applications with ReCAPTZ: A Complete Guide

Meet Grandma Edna. She's 78 years old, runs a successful online knitting shop, and bakes the best cookies in town.


Life was good — until hackers started attacking her website.

Her shop, "Edna's Cozy Knits," was suddenly flooded with fake orders, spam messages, and Russian bot accounts trying to buy her hand-knitted sweaters using stolen credit cards.

Grandma Edna wasn't going to let some cybercriminals mess with her business.


She put down her knitting needles, adjusted her glasses, and said:

"Not today, bots."

And that's when she discovered ReCAPTZ.

Step 1: Grandma Installs ReCAPTZ

Her grandson, Timmy (a "tech whiz" who just started learning React), helped her install ReCAPTZ:

npm install recaptz

Then, they added a CAPTCHA to stop fake sign-ups:

import { Captcha } from 'recaptz';



function SignupForm() {

  const handleValidate = (isValid: boolean) => {

    if (isValid) {

      console.log('Verified! Real customer detected.');

    }

  };

  return (

    <Captcha

      type="mixed"

      length={6}

      onValidate={handleValidate}

    />

  );

}

Within minutes, Grandma Edna had stopped 99% of the fake accounts.


But she wasn't done yet.

Step 2: Stopping Spam Messages

Bots were spamming her contact form with messages like:

• "Buy cheap Bitcoin now!"


• "Hot singles in your area!"


• "Prince of Nigeria needs your help!"

Grandma Edna had enough. She added a letters-only CAPTCHA to her contact form:

<Captcha

  type="letters"

  length={5}

  validationRules={{

    required: true,

    customValidator: (value) =>

      /^[a-zA-Z]+$/.test(value) || 'Only letters allowed, spammer!'

  }}

  onValidate={(isValid) => console.log('Verified:', isValid)}

/>

The scammers? Blocked. Gone. Vanished.


Now, only real customers could ask Grandma about her sweaters.

Step 3: Preventing Brute-Force Logins

A hacker tried to guess Grandma's admin password by running a bot that tested thousands of combinations.

Bad news for the hacker: Grandma was already two steps ahead.


She added a CAPTCHA to her login page:

<Captcha

  type="mixed"

  length={6}

  refreshable={true}

  maxAttempts={3}

  refreshInterval={30}

  validationRules={{

    required: true,

    minLength: 6

  }}

  onValidate={(isValid) => console.log('Verified:', isValid)}

/>

Now, after 3 failed attempts and every 30 seconds, the CAPTCHA automatically refreshed, forcing bots to start over.

Grandma's admin panel? Completely secure.

Step 4: Making CAPTCHA Senior-Friendly

Grandma loved ReCAPTZ, but she had one tiny request:

"Timmy, my eyesight isn't what it used to be. Can we make it easier to read?"

So Timmy enabled dark mode and audio support:

<Captcha

  type="mixed"

  length={6}

  darkMode

  enableAudio

  onValidate={(isValid) => console.log('Verified:', isValid)}

/>

Now, customers who struggled with small text could listen to the CAPTCHA instead.

Step 5: Protecting the Checkout Page

Some bots were still placing fake orders, so Grandma integrated ReCAPTZ into her checkout form using React Hook Form:

Using React Hook Form

import { useForm } from 'react-hook-form';

import { Captcha } from 'recaptz';



function CheckoutForm() {

  const { handleSubmit, setError, clearErrors } = useForm();

  const [isCaptchaValid, setIsCaptchaValid] = useState(false);



  const onSubmit = (data) => {

    if (!isCaptchaValid) {

      setError('captcha', { type: 'manual', message: 'Complete the CAPTCHA' });

      return;

    }

    console.log('Order placed successfully!');

  };



  return (

    <form onSubmit={handleSubmit(onSubmit)}>

      {/* Form fields */}

      <Captcha

        type="mixed"

        length={6}

        onValidate={(isValid) => {

          setIsCaptchaValid(isValid);

          if (isValid) clearErrors('captcha');

        }}

      />

      <button type="submit">Buy Now</button>

    </form>

  );

}

Using Formik

import { Formik, Form } from 'formik';

import { Captcha } from 'recaptz';



function CheckoutForm() {

  return (

    <Formik

      initialValues={{ captchaValid: false }}

      onSubmit={(values) => {

        if (values.captchaValid) {

          console.log('Order placed!');

        }

      }}

    >

      {({ setFieldValue }) => (

        <Form>

          {/* Form fields */}

          <Captcha

            type="mixed"

            length={6}

            onValidate={(isValid) => setFieldValue('captchaValid', isValid)}

          />

          <button type="submit">Submit</button>

        </Form>

      )}

    </Formik>

  );

}

The bots? Completely shut out.


Grandma Edna? Selling more sweaters than ever.

The Victory

After implementing ReCAPTZ, Grandma Edna's shop saw:

✅ Zero fake orders


✅ No more spam messages


✅ No more hacked accounts


✅ Higher customer satisfaction

Grandma celebrated by knitting a new sweater.


Timmy bragged to his friends about saving the family business.


The hackers? They moved on — but not before leaving a 1-star review that got flagged as spam.

Try ReCAPTZ for Yourself

If Grandma Edna can protect her business with ReCAPTZ, so can you.

Install it today:

npm install recaptz

Learn more:

GitHub

Don't let hackers, bots, and spammers ruin your website.


Take back control with ReCAPTZ. 🦾🔥