disable button after click

Hello,

You can try something like this:
[ch_pre type="js"]document.getElementById("myBtn").onclick = e => {
e.preventDefault();
document.getElementById("myBtn").disabled = true;
};[/ch_pre]

Since these codes are not related to Canvas and are customizations, we Apologize for the Inconveniences, however, we currently do not provide Customization related Support according to the Item Support Policy: https://themeforest.net/page/item_support_policy . You will need to manually code this or Hire a Freelancer to help you out.

Hope this Helps!

Let us know if we can help you with anything else or if you find any further issues.