FileReaderSync
Note: This feature is only available in Web Workers, except for Service 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 aFile
into anArrayBuffer
representing the input data as a binary string. FileReaderSync.readAsBinaryString()
Deprecated-
This method converts a specified
Blob
or aFile
into a string representing the input data as a binary string. This method is deprecated, consider usingreadAsArrayBuffer()
instead. FileReaderSync.readAsText()
-
This method converts a specified
Blob
or aFile
into a string representing the input data as a text string. The optionalencoding
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 aFile
into a string representing the input data as a data URL.
Specifications
Specification |
---|
File API # FileReaderSync |
Browser compatibility
BCD tables only load in the browser