FileReaderSync: FileReaderSync() constructor
Baseline Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
Note: This feature is only available inWeb Workers, except forService Workers.
TheFileReaderSync() constructor creates a newFileReaderSync.
Syntax
js
new FileReaderSync()Parameters
None.
Examples
The following code snippet shows creation of aFileReaderSync object using theFileReaderSync() constructor and subsequent usage of the object:
js
function readFile(blob) { const reader = new FileReaderSync(); postMessage(reader.readAsDataURL(blob));}Note:This snippet must be used inside aWorker, as synchronous interfaces can't be used on the main thread.
Specifications
| Specification |
|---|
| File API # filereadersyncConstrctr |
Browser compatibility
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