How can I save and retrieve associated array from chrome local storage

Question

How can I store associated array in chrome local storage, and retrieve that in the same format? I want to save "identityKeyPair", which is in the form

identityKeyPair -> { pubKey: ArrayBuffer, privKey: ArrayBuffer }

I tried the below things. But not working out. I am getting [Object Object] on trying to retrieve it.

Saving to local storage

chrome.storage.sync.set({'identityKeyPair': JSON.stringify(identityKeyPair)}, function() { alert('identityKeyPair saved'); });

Trying to retrieve

chrome.storage.sync.get(["identityKeyPair"], function(items){ if (items.identityKeyPair) { alert(JSON.parse(items.identityKeyPair).pubKey); }

Possible duplicate of saving and retrieving from chrome.storage.sync — Patrick Barr
– Patrick Barr, Commented Jun 29, 2017 at 17:38
I suspect this may have something to do with you stringify-ing ArrayBuffers, see stackoverflow.com/questions/8593896/… — Tom Dunn
– Tom Dunn, Commented Jun 29, 2017 at 17:49

Ravi Teja Kumar Isetty · Accepted Answer · 2017-06-29 18:45:13Z

Please follow these steps while you are using chrome.storage.sync

Declare storage permissions in your manifest.

manifest.json

{ "manifest_version": 2, "name": "Storage", "description": "This extension shows a Google Image search result for the current page", "version": "1.0", "icons":{ "256":"img/icon.png" }, "permissions": [ "storage" ], "app": { "launch": { "local_path": "options.html" } }, "background": { "scripts": ["js/app/background.js"] } }

Reload your App in chrome://extensions so that your manifest.json gets updated in your browser.
Follow the exact syntax of chrome.storage.sync with its callback function.

Sample.js

$(".thing").click(function() { chrome.storage.sync.set({"myKey": "testPrefs"},function(){ alert("object stored"); }) chrome.storage.sync.get("myKey",function(obj){ alert(obj.myKey); }) });

This will work for you. I tested this code in my chrome app.

I am getting empty arrays, {"pubKey":{},"privKey":{}}. Have you tried to save the data in identityKeyPair -> { pubKey: ArrayBuffer, privKey: ArrayBuffer } format ?

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