The readAsText() method is used to read the contents of the specified Blob or File. When the read operation is complete, the readyState is changed to DONE, the loadend event is triggered, and the result attribute contains the contents of the file as a text string.
Newer API avaliable
The Blob.text() method is a newer promise-based API to read a file as text.
Syntax
instanceOfFileReader.readAsText(blob[, encoding]);
Parameters
blob- The
BloborFilefrom which to read. encodingOptional- A string specifying the encoding to use for the returned data. By default, UTF-8 is assumed if this parameter is not specified.
Specifications
| Specification | Status | Comment |
|---|---|---|
| File API The definition of 'FileReader' 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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
readAsText | Chrome Full support 7 | Edge Full support 12 | Firefox Full support 3.6 | IE Full support 10 | Opera Full support 11 | Safari Full support 6 | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support 32 | Opera Android Full support 11 | Safari iOS Full support 6.1 | Samsung Internet Android ? |
Legend
- Full support
- Full support
- Compatibility unknown
- Compatibility unknown