browser-nativefs

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browser-nativefs

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Native File System API with legacy fallback in the browser

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# Browser-NativeFS

This module allows you to either use the
[Native File System API](https://wicg.github.io/native-file-system/) on supporting browsers,
with a transparent fallback to the `<input type="file">` and `<a download>` legacy methods.

## Usage

The module feature-detects support for the Native File System API and
only loads the actually relevant code.

```js
import {
  fileOpenPromise,
  fileSavePromise,
} from 'https://unpkg.com/browser-nativefs';

(async () => {
  // This dynamically either loads the Native File System API
  // or the legacy module.
  const fileOpen = (await fileOpenPromise).default;
  const fileSave = (await fileSavePromise).default;

// Open a file.
  const blob = await fileOpen({mimeTypes: ['image/*']});
  // Open multiple files
  const blobs = await fileOpen({mimeTypes: ['image/*'], multiple: true});
  // Save a file.
  await fileSave(blob, {fileName: 'Untitled.png'});
})();
```

## API

```js
const options = {
  mimeTypes: ['image/*'],
  extensions: ['png', 'jpg', 'jpeg', 'webp'],
  multiple: true,
  description: 'Image files',
};
const blobs = await fileOpen(options);
```

```js
const options = {
  fileName: 'Untitled.txt',
};
await fileSave(someBlob, options);
```

## License

Apache 2.0.

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