Asyncronous convert an array buffer to a base64 string

arrayBufferToBase64.js

/**
 * @param {ArrayBuffer | Array} arrayBufferToBase64
 * @return Promise<string>
*/
const arrayBufferToBase64 = (buffer = new ArrayBuffer()) => {
  return new Promise((resolve, reject) => {
    try {
      let binary = ''
      const bytes = new Uint8Array(buffer)

      for (let i = 0; i < bytes.byteLength; i++) {
        binary += String.fromCharCode(bytes[i])
      }

      return resolve(window.btoa(binary))
    } catch (e) {
      reject(e)
    }
  })
}