Discussion on: reCaptcha verification with EmailJS

[James Wallis]

Hi Simon,

Unfortunately, I don't have the code for Vue but I've had a look on their docs and it looks to be the same. You should use the .send function documented here: emailjs.com/docs/sdk/send/. Then when calling the .send function, add the field 'g-recaptcha-response' and the reCaptcha code into the params object.

For example if you had a EmailJS template that required a name and message you'd do the following adding in the g-recaptcha-response:

emailjs.send(
      emailJSService,
      emailJSTemplate,
      {
          name: "Simon",
          message: "A new message",
          'g-recaptcha-response': 'your_recaptcha_returned_code',
      },
      emailJSUser, // this is optional
    )

If you send me a link to your code or paste the relevant part as a comment I'm happy to take a look.

[Simon Measures]

Thanks so much, James. I'll take a close look over your guidance and code tomorrow.

I said I was working on a Vue application but actually it's a Nuxt application. You'll understand I'm sure as I see you work with Next.js.

My code is here:
github.com/pastorsi/ghost-nuxt-web...

In the script section of that file, onSubmit for reCaptcha is not actioned because I couldn't get it working. I action EmailJS without reCaptcha.

(My repository is a working repository for a website. The working website contact form here mcea.org.uk/contact.)

All the best,

Simon
Monmouth, UK

[James Wallis]

No problem at all.

I’ve had a look your code and done a bit of research on Nuxt to understand it a bit better.

You’re using .sendForm and passing the e.target as the third parameter. AFAIK Recaptcha only works with the .send function.

So this is what I’d suggest:

1. Change .sendForm to be .send
2. For the third parameter pass an object, the keys need to be the same as your EmailJS template. I’ll assume they’re name, email and message. Then add another key: g-recaptcha-response.
3. Add an ID to the two inputs and text areas, something like id=“form-name” etc.
4. Populate the object using document.getElementById(). So the EmailJS parameter object and .send function should roughly look like:

const emailsJSParams = {
    name: document.getElementById('form-name').value,
    email: document.getElementById('form-email').value,
    message: document.getElementById('form-message').value,
    'g-recaptcha-response': yourCaptchaResponse,
}

emailjs
        .send(
          'service_bt8lbbb',
          'mcea_contact_form',
          emailsJSParams,
          'user_ddB1kBYjUr7bhz87JDRm5'
        )

I’ve not tested that code block but it should at least put you on the right track!

Let me know how you get on and if you need further assistance.

Thanks, James

[Sergey Khomushin]

To be honest, the captcha was made for sendForm method, since the captcha is usually part of the form. However, the send method can send any params, including the captcha token.
By the way, this is why the name of the parameter is so strange (g-recaptcha-response), this is the default name from reCAPCHA.

[James Wallis]

Ah is that right? I ended up using send as I wanted to show the reCaptcha after the form was submitted but before querying EmailJS.
Additionally, I wasn't able to find a guide to use reCaptcha with sendForm whereas I could find one for send emailjs.com/docs/rest-api/send/. Looking again at the docs and your comment I guess that you literally just put the reCaptcha inside the form element and EmailJS will get it out of e.target.

[Sergey Khomushin]

Yeah, you guess correctly.