PWA Share Target API accept any file type

generateManifest.js

// using 'application/*' doesn't do the trick but adding as many mimetypes and filetypes as you can seems to get the serviceworker to accept them if they are listed explicitly.
import mimeDb from 'mime-db'
import fileTypes from './src/utils/fileTypes' // from https://github.com/dyne/file-extension-list/blob/master/pub/extensions.json

const allFileTypesAndMimes = () => {
  return process.env.NODE_ENV === 'production'
    ? [...Object.keys(mimeDb), ...fileTypes]
    : []
}

const makeManifest = () => {
  return manifest {
        name: 'name',
        short_name: 'name',
        theme_color: '#282829',
        background_color: '#282829',
        start_url: '/',
        display: 'standalone',
        icons: [...],
        share_target: {
          action: '/_share',
          method: 'POST',
          enctype: 'multipart/form-data',
          params: {
            title: 'title',
            text: 'body',
            url: 'url',
            files: [
              {
                name: 'text',
                accept: ['text/plain', 'text/string'],
              },
              {
                name: 'media',
                accept: [
                  'audio/*',
                  'image/*',
                  'video/*',
                  ...allFileTypesAndMimes(),
                ],
              },
            ],
          },
        },
      },
    }
}