FileReader.readAsArrayBuffer()

The readAsArrayBuffer() method of the FileReader interface is used to start reading the contents of a specified Blob or File. When the read operation is finished, the readyState property becomes DONE, and the loadend event is triggered. At that time, the result property contains an ArrayBuffer representing the file’s data.

Note: The Blob.arrayBuffer() method is a newer promise-based API to read a file as an array buffer.

Inputs: blob The Blob or File from which to read.