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    The 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.




    The Blob or File from which to read.


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

    Browser compatibility

    Feature Firefox (Gecko) Chrome Internet Explorer* Opera* Safari
    Basic support 3.6 (1.9.2) 7 10 12.02 6.0.2
    Feature Firefox Mobile (Gecko) Android IE Mobile Opera Mobile Safari Mobile
    Basic support 32 3 10 11.5 6.1

    Implementation notes

    Gecko-specific notes

    • Prior to Gecko 2.0 beta 7 (Firefox 4.0 beta 7), all Blob parameters below were File parameters; this has since been updated to match the specification correctly.
    • Prior to Gecko 13.0 (Firefox 13.0 / Thunderbird 13.0 / SeaMonkey 2.10) the FileReader.error property returned a FileError object. This interface has been removed and FileReader.error is now returning the DOMError object as defined in the latest FileAPI draft.

    See also

    Document Tags and Contributors

    Contributors to this page: fscholz, Jeremie, teoli, dolphonebubleine
    Last updated by: teoli,