Chrome Extension: Local Storage, how to export

google-chrome-extension, local-storage

Solution

First, you need to get all data. Then serialize the result. Finally, offer it as a download to the user.

chrome.storage.local.get(null, function(items) { // null implies all items
    // Convert object to a string.
    var result = JSON.stringify(items);

    // Save as file
    var url = 'data:application/json;base64,' + btoa(result);
    chrome.downloads.download({
        url: url,
        filename: 'filename_of_exported_file.json'
    });
});

To use the `chrome.downloads.download` method, you need to declare the `"downloads"` permission in addition to the `storage` permission in the manifest file.

Problem

I have a chrome extension that saves a bunch of data to chrome.storage.local. I'm trying to find easy ways to export this data and package it into a file. I'm not constrained on what type of file it is (JSON, CSV, whatever), I just need to be able to export the contents into a standalone (and send-able) file. The extension is only run locally and the user would have access to all local files.

Original source