The readAsText()
method of the FileReaderSync
interface allows to read File
or Blob
objects in a synchronous way into a string. This interface is only available in workers as it enables synchronous I/O that could potentially block.
The readAsText()
method of the FileReaderSync
interface allows to read File
or Blob
objects in a synchronous way into a string. This interface is only available in workers as it enables synchronous I/O that could potentially block.
js
readAsText(File) readAsText(Blob) readAsText(File, encoding) readAsText(Blob, encoding)
A string representing the input data.
The following exceptions can be raised by this method:
NotFoundError
DOMException
Thrown if the resource represented by the DOM File
or Blob
cannot be found, e.g. because it has been erased.
SecurityError
DOMException
Thrown if one of the following problematic situation is detected:
NotReadableError
DOMException
Thrown if the resource cannot be read due to a permission problem, like a concurrent lock.
EncodingError
DOMException
Thrown if the resource is a data URL and exceed the limit length defined by each browser.
Specification |
---|
File API # readAsTextSync |
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
readAsText |
7 | 12 | 8 | 10 | ≤12.1 | 6 | 4.4 | 18 | 8 | ≤12.1 | 6 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/FileReaderSync/readAsText