FileReader.readAsArrayBuffer()

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

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

Syntax

instanceOfFileReader.readAsArrayBuffer(blob);

Parameters

blob
The Blob or File from which to read.

Specifications

Specification Status Comment
File API
The definition of 'FileReader.readAsArrayBuffer' in that specification.
Working Draft Initial definition

Browser compatibility

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See also