A script to upload eesel data

upload.js

;(() => {
  const input = document.createElement('input')
  input.type = 'file'
  input.addEventListener(
    'change',
    () => {
      const [file] = input.files
      const reader = new FileReader()
      reader.readAsText(file)

      reader.onloadend = () => {
        const result = JSON.parse(reader.result)

        ;(function openTransaction(databaseVersion) {
          const request = indexedDB.open('main', databaseVersion)
          request.onsuccess = async (event) => {
            const db = event.target.result
            const objectStoreNameList = Object.keys(result)

            const transaction = db.transaction(objectStoreNameList, 'readwrite')

            objectStoreNameList.forEach((objectStoreName) => {
              const objectStore = transaction.objectStore(objectStoreName)

              objectStore.clear().onsuccess = () => {
                result[objectStoreName].forEach((value) => {
                  objectStore.add(value)
                })
              }
            })

            transaction.oncomplete = () => {
              window.alert('Import complete. The extension will be reloaded')
              chrome.runtime.reload()
            }
          }
          request.onerror = async (event) => {
            if (databaseVersion < 300) {
              openTransaction(databaseVersion + 1)
            }
          }
        })(122)
      }
    },
    false
  )

  input.click()
})()