How to add canvas and secure canvas URL in Facebook application

Question

I'm trying to develop a Facebook tutorial "Friends of Smash", but I had a big problem: it’s not possible to add a canvas and a secure canvas URL in

Settings → Add Platform → Website

I get below options

How to add canvases and secure canvas urls?

Answer 1

Canvases and secure canvas URLs apply only to Facebook apps. Your application (if you are on the website platform) does not use canvas URLs.

Excerpt from the documentation that talked about applications on canvas:

Facebook applications are loaded into the canvas section of the Page canvas. The canvas is pretty literally an empty canvas on Facebook that launches your application. You fill the canvas by providing a URL canvas that contains the HTML, JavaScript, and CSS that make up your application. When a user using your application requests a Canvas page, we load the canvas URL into an iframe on that page. This will cause your application to appear in standard Facebook chrome.

Answer 2

Click Add Platform, and then you can add your canvas URL and secure canvas URL.