Update page-load.js - Adding some request options

[DrJest]

Added an option to change request behaviour, allowing to add custom request headers, change request method and progress/abort callbacks
Had to change this to deal with Wordpress's admin-ajax which only accepts POST requests, maybe someone else could find it useful

[desandro]

Thanks for opening this PR. I could see how this kind of feature would be useful.
Add a 👍 reaction to this issue if you would like to see this feature added. Do not add +1 comments — They will be deleted.

[calinrada]

Is the maintainer dead ?

[desandro]

Infinite Scroll v4 has been released. Infinite Scroll v4 adds a new option, fetchOptions, which allows you to set method, headers, CORS mode, and other fetch options.

fetchOptions: {
  mode: 'cors',
  cache: 'no-cache',
  credentials: 'same-origin',
  headers: {
    'X-Session-Id': '33vscths658h7996d324rqft1s',
  },
},

Thank you for your original contribution. While I did not merge it in, your effort did help me decide to support the feature.