promisify-file-reader/dist/index.cjs

Promise File Reader

'use strict'

// eslint-disable-next-line no-new-func
var globalThis = new Function('return this')()
var FileReader$1 = globalThis.FileReader,
  Promise$1 = globalThis.Promise,
  Blob = globalThis.Blob

function promisify(method) {
  return function (blob, encoding) {
    return new Promise$1(function (resolve, reject) {
      var fileReader = new FileReader$1()

      fileReader.onload = function () {
        return resolve(fileReader.result)
      }

      fileReader.onerror = function () {
        return reject(fileReader.error)
      }

      method.call(fileReader, blob, encoding)
    })
  }
}

function toStatic(method) {
  return function (blob, encoding) {
    return method.call(blob, encoding)
  }
}

var readAsArrayBuffer = Blob.prototype.arrayBuffer
  ? toStatic(Blob.prototype.arrayBuffer)
  : promisify(FileReader$1.prototype.readAsArrayBuffer)

var fromCharCode = String.fromCharCode

function arrayBufferToBinaryString(buffer) {
  var bytes = new Uint8Array(buffer)
  var byteLength = bytes.byteLength
  var binary = '' // can we use a chuck size for this loop?

  for (var index = 0; index < byteLength; index += 1) {
    binary += fromCharCode(bytes[index])
  }

  return binary
}

function getBinaryStringFromArrayBuffer(blob) {
  return readAsArrayBuffer(blob).then(arrayBufferToBinaryString)
} // IE 10 don't has `readAsBinaryString`

var readAsBinaryString = FileReader$1.prototype.readAsBinaryString
  ? promisify(FileReader$1.prototype.readAsBinaryString)
  : getBinaryStringFromArrayBuffer

var readAsDataURL = promisify(FileReader$1.prototype.readAsDataURL)

var readAsText = promisify(FileReader$1.prototype.readAsText)

var core = /*#__PURE__*/ Object.freeze({
  __proto__: null,
  readAsArrayBuffer: readAsArrayBuffer,
  readAsBinaryString: readAsBinaryString,
  readAsDataURL: readAsDataURL,
  readAsText: readAsText,
})

var staticMethods = /*#__PURE__*/ Object.freeze({
  __proto__: null,
  readAsArrayBuffer: readAsArrayBuffer,
  readAsBinaryString: readAsBinaryString,
  readAsDataURL: readAsDataURL,
  readAsText: readAsText,
  arrayBuffer: readAsArrayBuffer,
  binaryString: readAsBinaryString,
  dataURL: readAsDataURL,
  text: readAsText,
})

var FileReader = function FileReader() {}

Object.assign(FileReader.prototype, core)
Object.assign(FileReader, staticMethods)

module.exports = FileReader
//# sourceMappingURL=index.cjs.map