The text()
method in the Blob
interface returns a Promise
that resolves with a string containing the contents of the blob, interpreted as UTF-8.
Syntax
var textPromise = blob.text(); blob.text().then(text => /* do something with the text */); var text = await blob.text();
Parameters
None.
Returns
A promise that resolves with a USVString
which contains the blob's data as a text string. The data is always presumed to be in UTF-8 format.
Usage notes
The FileReader
method readAsText()
is an older method that performs a similar function. It works on both Blob
and File
objects. There are two key differences:
Blob.text()
returns a promise, whereasFileReader.readAsText()
is an event based API.Blob.text()
always uses UTF-8 as encoding, whileFileReader.readAsText()
can use a different encoding depending on the blob's type and a specified encoding name.
Specifications
Specification | Status | Comment |
---|---|---|
File API The definition of 'Blob.text()' in that specification. |
Working Draft |
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 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
text() | Chrome Full support 76 | Edge Full support 79 | Firefox Full support 69 | IE No support No | Opera No support No | Safari No support No | WebView Android Full support 76 | Chrome Android Full support 76 | Firefox Android No support No | Opera Android Full support 54 | Safari iOS No support No | Samsung Internet Android Full support 12.0 |
Legend
- Full support
- Full support
- No support
- No support