Can link rel=preload be made to work with fetch?

Question

I have a large JSON blob I would like to have preloaded with my webpage. To do this, I have added

Answer 1

Thanks to the discussion in this bug, I got fetch to work with preload in Chromium 67:

First, add crossorigin attribute to the preload link:

Second, add same-origin credentials to the fetch request:

fetch(url, {credentials: 'same-origin'}).then(response => {
    console.log(response);
});

Alternatively, you can use XMLHttpRequest instead of fetch (with XHR you don't need to add anything to the request), but only if you're not going to use responseType = 'blob' - it won't work due to another bug.