FileReaderSync: FileReaderSync() constructor

Note: This feature is only available in Web Workers, except for Service Workers.

The FileReaderSync() constructor creates a new FileReaderSync.

Syntax

js
new FileReaderSync()

Parameters

None.

Examples

The following code snippet shows creation of a FileReaderSync object using the FileReaderSync() 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 a Worker, as synchronous interfaces can't be used on the main thread.

Specifications