Claim all items in an itch.io bundle

itch-io.claim-bundle.js

(async function () {
  if (!/\/bundle\/download\/.+/.test(location.pathname))
    return alert("Not on a supported page")

  const baseURL = `${location.origin}${location.pathname}`,
    baseDOM = new DOMParser().parseFromString(
      await fetch(baseURL).then((res) => res.text()),
      "text/html"
    ),
    maxPage = Math.max(
      ...Array.from(baseDOM.querySelectorAll(".pager a[href]")).map((x) =>
        Number.parseInt(
          new URL(x?.href ?? "a://")?.searchParams?.get("page") ?? ""
        )
      )
    )

  for (let pageNum = 1; pageNum <= maxPage; pageNum++) {
    let pageDOM = new DOMParser().parseFromString(
        await fetch(`${baseURL}?page=${pageNum}`).then((res) => res.text()),
        "text/html"
      ),
      games = pageDOM.querySelectorAll(".game_row")
    for (let game of games) {
      let form = game.querySelector('form:has(button[value="claim"])'),
        formData = new FormData(),
        gameTitle = game?.querySelector(".game_title")?.innerText?.trim() ?? ""

      if (!form) {
        console.debug(`Skipping item (in library or unclaimable): ${gameTitle}`)
        continue
      }

      form
        .querySelectorAll(":scope>*[name][value]")
        .forEach((e) =>
          formData.append(
            e?.getAttribute("name") ?? "",
            e?.getAttribute("value") ?? ""
          )
        )
      console.debug(`Adding item to library: ${gameTitle}`)

      fetch(baseURL, {
        method: form?.getAttribute("method") ?? "post",
        body: formData,
      })
    }
  }
})()

itch-io.claim-bundle.min.js

!async function(){if(!/\/bundle\/download\/.+/.test(location.pathname))return alert("Not on a supported page");const e=`${location.origin}${location.pathname}`,t=(new DOMParser).parseFromString(await fetch(e).then((e=>e.text())),"text/html"),r=Math.max(...Array.from(t.querySelectorAll(".pager a[href]")).map((e=>Number.parseInt(new URL(e?.href??"a://")?.searchParams?.get("page")??""))));for(let t=1;t<=r;t++){let r=(new DOMParser).parseFromString(await fetch(`${e}?page=${t}`).then((e=>e.text())),"text/html").querySelectorAll(".game_row");for(let t of r){let r=t.querySelector('form:has(button[value="claim"])'),a=new FormData,o=t?.querySelector(".game_title")?.innerText?.trim()??"";r?(r.querySelectorAll(":scope>*[name][value]").forEach((e=>a.append(e?.getAttribute("name")??"",e?.getAttribute("value")??""))),console.debug(`Adding item to library: ${o}`),fetch(e,{method:r?.getAttribute("method")??"post",body:a})):console.debug(`Skipping item (in library or unclaimable): ${o}`)}}}();