The source code used to fetch, calculate and display the data is here: <a href="https://github.com/fiatjaf/gutenberg-book-sizes" rel="nofollow">https://github.com/fiatjaf/gutenberg-book-sizes</a><p>Is there a canonical way of displaying the source-code powering a webpage? Like a <meta> tag or something like that? If not, there should be!