Hide all Google calendars

main.js

(async () => {
  async function sleep(ms) {
    return new Promise((resolve) => setTimeout(resolve, ms));
  }

  let el = document.querySelector('[aria-label="My calendars"]').children[0];

  while (el) {
    const label = el.querySelector("label");
    const checkbox = el.querySelector("[role=checkbox]");
    const value = checkbox.attributes["aria-checked"].value === "true";
    if (value) label.click();
    el.scrollIntoView();
    await sleep(100);
    el = el.nextSibling;
  }

  console.log("done");
})();