FileReaderSync

Available in workers

The FileReaderSync interface allows to read File or Blob objects synchronously. This interface is only available in workers as it enables synchronous I/O that could potentially block.

Constructor

• FileReaderSync()
  • : Returns a new FileReaderSync object.

Instance properties

This interface does not have any properties.

Instance methods

• FileReaderSync.readAsArrayBuffer()
  • : This method converts a specified Blob or a File into an ArrayBuffer representing the input data as a binary string.
• FileReaderSync.readAsBinaryString() Deprecated
  • : This method converts a specified Blob or a File into a string representing the input data as a binary string. This method is deprecated, consider using readAsArrayBuffer() instead.
• FileReaderSync.readAsText()
  • : This method converts a specified Blob or a File into a string representing the input data as a text string. The optional encoding parameter indicates the encoding to be used (e.g., iso-8859-1 or UTF-8). If not present, the method will apply a detection algorithm for it.
• FileReaderSync.readAsDataURL()
  • : This method converts a specified Blob or a File into a string representing the input data as a data URL.

Specifications

Browser compatibility

See also

• FileReader
• Blob
• File