Script to bulk claim an itch.io bundle (paste in console on bundle page)

itch_bundle_claim.js

[...Array(parseInt(document.querySelector("span.pager_label>a").innerText)).keys()]
    .map(i => i + 1)
    .reduce((p, i) => p.then(l => fetch(location.origin + location.pathname + "?page=" + i)
                                   .then(x => x.text())
                                   .then(x => [...l, new DOMParser().parseFromString(x, "text/html")]),
                                  )
            .then(x => new Promise(f => setTimeout(() => f(x), 2000))),
            Promise.resolve([]))
    .then(l => l
          .flatMap(d => Array.from(d.querySelectorAll("form:has(button[value='claim'])")))
          .reduce((p, f) => p
                  .then(_ => fetch("", {body: new URLSearchParams(new FormData(f, f.querySelector("button"))), method: f.method, redirect: "manual"}))
                  .then(_ => new Promise(f => setTimeout(f, 2000))),
                  Promise.resolve(null)));