Implementing Google reCAPTCHA Version 3 on Websites
Introduction:
Google reCAPTCHA Version 3 is a powerful tool for protecting your website from spam and abuse while providing a seamless user experience. In this blog post, we will guide you through the process of implementing reCAPTCHA Version 3 in JavaScript. This precise tutorial will help you safeguard your website with minimal hassle.
Step 1: Sign Up for reCAPTCHA:
To get started, visit the reCAPTCHA website (https://www.google.com/recaptcha) and sign in with your Google account. If you don't have an account, you can create one for free. After logging in, click on the "+ button" to create a new site.
Step 2: Register Your Site:
Fill out the registration form with the following details:
- Label: Give your site a name for identification.
- reCAPTCHA type: Choose "reCAPTCHA v3."
- Domains: Add the domain(s) where you intend to use reCAPTCHA. You can use wildcards for subdomains, e.g., "*.example.com."
Accept the terms of service, and then click the "Submit" button. You will be redirected to a page where you can obtain your site key and secret key.
Step 3: Get Your Keys:
Once your site is registered, you'll see your site key and secret key on the reCAPTCHA admin console. Keep these keys safe; you'll need them for implementation.
Step 4: Include reCAPTCHA in Your HTML:
In the HTML file where you want to implement reCAPTCHA, include the reCAPTCHA script just before the closing </body> tag:
```html
<script src="https://www.google.com/recaptcha/api.js?render=YOUR_SITE_KEY"></script>
```
Replace "YOUR_SITE_KEY" with your actual site key.
Step 5: Implement reCAPTCHA Verification:
In your JavaScript code, use the reCAPTCHA API to verify user actions. For example, you can use it with a form submission:
```javascript
// Add an event listener to your form submission
document.getElementById("your-form").addEventListener("submit", function (event) {
event.preventDefault(); // Prevent the form from submitting
grecaptcha.ready(function () {
grecaptcha.execute('YOUR_SITE_KEY', { action: 'submit_form' }).then(function (token) {
// Send the token to your server for verification
fetch('/verify-recaptcha', {
method: 'POST',
headers: {
'Content-Type': 'application/json'
},
body: JSON.stringify({ token: token })
})
.then(function (response) {
return response.json();
})
.then(function (data) {
if (data.success) {
// Proceed with form submission
document.getElementById("your-form").submit();
} else {
// Handle verification failure
alert('reCAPTCHA verification failed. Please try again.');
}
});
});
});
});
```
Make sure to replace 'YOUR_SITE_KEY' with your actual site key and adjust the 'action' parameter accordingly.
Step 6: Server-Side Verification:
On your server, validate the reCAPTCHA token using Google's reCAPTCHA API by making a POST request to `https://www.google.com/recaptcha/api/siteverify`. Check the response's 'success' field to determine whether the verification was successful.
Conclusion:
By following these simple steps, you can implement Google reCAPTCHA Version 3 and enhance the security of your website while ensuring a smooth user experience. Protect your site from spam and abuse with this powerful tool, and keep your online presence secure.
