ReCAPTCHA couldn't find user-provided function: myCallBack

Question

I'm trying to use ReCAPTCHA where I am getting following error.

ReCAPTCHA couldn't find user-provided function: myCallBack.

How can I solve this issue?

var verifyCallback3 = function(response) {
    if(response!=null){
        $("#rss").show();
    }
};

var myCallBack = function() {
    grecaptcha.render('html_element', {
        'sitekey' : '6sssfffffffffAAPfEI_RkbAlUuw5FA4p-kiGy5Nea',
        'callback' : verifyCallback3,
        'theme' : 'light',
        'type':'image'
    });
};

Answer 1

Make sure your callback function is being defined in the global scope. For some reason, in production my function was not in this namespace.

In addition to:

function myCallback() { ... }

Make sure you directly assign it into the global space:

window.myCallback = myCallback;

You should be able to test whether this is your problem, my typing the function name at the Javascript console and seeing if it's defined or not.

Answer 2

In your recaptcha div, make sure not to use parenthesis in your data-callback.

Like so data-callback="yourCallback", rather than data-callback="yourCallback();"

Answer 3

The same thing happening with me.I have checked my code carefully, every thing is fine but captcha not shown and in console the message is "ReCAPTCHA couldn't find user-provided function: myCallBack" but finally I found that my JavaScript code was is in page load function. I am just put out it from page load function and its working.

Answer 4

You have to put your script function:

<script> function registerFormCheck()</script>

Before the google script something like this:

/* First */    <script> function registerFormCheck(){} </script>
/* Second */   <script> src='https://www.google.com/recaptcha/api.js'></script>

This worked for me...