chrome sync storage to store and update array

Question

is it possible to store array in chrome storage sync and retrieve them ?

var uarray = [abc,def,ghi];

Is it possible to update the stored ar

Answer 1

You can read the existing values, append the new value and store back.

Following sample code should allow you to add newArrEntry into existing array stored in chrome.storage.sync

chrome.storage.sync.get(["storagekey"], function(result) {
        var array = result[storagekey]?result[storagekey]:[];

        array.unshift(newArrEntry);

        var jsonObj = {};
        jsonObj[storagekey] = array;
        chrome.storage.sync.set(jsonObj, function() {
            console.log("Saved a new array item");
        });
    });