cordova-plugin-save-dialog

This Cordova plugin displays the native Save dialog which allows users to store a file in the selected location.

In Android, the plugin utilizes the Storage Access Framework to save a file in a user-selected location as described in the Android developer guide.

In iOS, the UIDocumentPickerViewController’s method initForExportingURLs:asCopy: is used for opening a document picker that can export a file to the selected folder. Note that this method is only available in iOS 14.0+, so older iOS versions are not supported by the plugin.

Installation

cordova plugin add cordova-plugin-save-dialog --save

API

The plugin’s functionality is accessible through the object cordova.plugins.saveDialog.

saveFile

Call this method to open the Save dialog and store raw contents in a file. The method accepts two arguments:

• file contents as a Blob instance,
• optional file name to display on default (the user may change it manually though).

The method returns a promise whose fulfillment value is a URI of the saved file in the user-selected location.

To construct a Blob representation for a file contents, either use the Blob constructor directly:

let blob = new Blob(["file contents"], {type: "text/plain"});
let fileName = "my-file.txt";
cordova.plugins.saveDialog.saveFile(blob, fileName).then(uri => {
  console.info("The file has been successfully saved to", uri);
}).catch(reason => {
  console.warn(reason);
});

or apply other methods of blob generation (such as Response.blob() for a network-fetched content):

try {
  let response = await fetch("https://httpbin.org/image/jpeg", {
    headers: {Accept: "image/jpeg"}
  });
  let blob = await response.blob();
  let uri = await cordova.plugins.saveDialog.saveFile(blob, "jackal.jpeg");
  console.info("The file has been successfully saved to", uri);
} catch (e) {
  console.error(e);
}

Do not try to use the returned URI for getting file access. It is provided for information purposes only. The user stores a file outside the application sandbox, so access to the saved resource is to be considered restricted.