Discovering the file system with window.resolveLocalFileSystemURL in Typescript for Ionic 3

After reviewing the documentation found on this link for the File plugin, I came across a paragraph that discusses how to add data to a log file. See the example code below: 

window.resolveLocalFileSystemURL(cordova.file.dataDirectory, function (dirEntry) {
    ...
}, onErrorLoadFs);

Unfortunately, I encountered an error:

The property 'resolveLocalFileSytemURL' is not recognized as part of the 'Window' type.

Can anyone shed some light on why this issue may have occurred? Are there any alternative methods for appending to a file using this particular plugin?

angulartypescriptionic-framework

Answer №1

When you need to access the files within a specific directory, you can utilize the listDir function - check out more information here: https://ionicframework.com/docs/native/file/:

import { File } from '@ionic-native/file';

constructor(private file: File) { }

...

this.file.listDir('file:///', this.file.dataDirectory)
    .then(_ => console.log('Directory exists'))
    .catch(err => console.log('Directory doesnt exist'));

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