javascript - Uncaught ReferenceError: grecaptcha is not defined

Question

I am using recaptcha v2

I am getting the following error occasionally (sometimes i don't get error and sometimes i do get it)

Uncaught ReferenceError: grecaptcha is not defined

It seems because of the internal http request. that takes some time to get another js recaptcha__en.js. Meanwhile actual rendering code of grecaptcha executes.

So what is the standard solution to avoid this issue.?

PS : of course i am looking for some solution other than setTimeout

Answer 1

Recaptcha has a onload callback that will run once recaptcha is loaded. Place your code inside that callback function.

https://developers.google.com/recaptcha/docs/display

<script>
    function onloadCallback() {
        /* Place your recaptcha rendering code here */
    }
</script>
<script src="https://www.google.com/recaptcha/api.js?onload=onloadCallback&render=explicit"></script>