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
property 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
Blob
orFile
from which to read. encoding
Optional- 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 'readAsText()' 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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
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 ≤37 | Chrome Android Full support 18 | Firefox Android Full support 32 | Opera Android Full support 11 | Safari iOS Full support 6.1 | Samsung Internet Android Full support 1.0 |
Legend
- Full support
- Full support