Add Promise.withResolvers Polyfill

Author: pckilgoreCreated Jun 13, 2024Updated Jul 19, 2024

What

Missing Promise.withResolvers

Details

react-pdf recently upgraded and no longer includes a polyfill for this API, which is now baseline available in 2024.

We've got some older safari clients breaking.

Happy to make a PR:

ref: CoreJS Polyfill

Code roughly:

if (typeof Promise.withResolvers === 'undefined') {
  window.Promise.withResolvers = function () {
    let resolve, reject;
    const promise = new Promise((res, rej) => {
      resolve = res;
      reject = rej;
    });
    return { promise, resolve, reject };
  }
}

Source: polyfillpolyfill/polyfill-service