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
Specifications
| Specification | Status | Comment |
|---|---|---|
| File API The definition of 'FileReader.readAsArrayBuffer' in that specification. |
Working Draft | Initial definition |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
readAsArrayBuffer | Chrome Full support 7 | Edge Full support 12 | Firefox Full support 3.6 | IE Full support 10 | Opera Full support 12 | Safari Full support 6 | WebView Android Full support ≤37 | Chrome Android Full support 18 | Firefox Android Full support 32 | Opera Android Full support 12 | Safari iOS Full support 6.1 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support