localStorage and sessionStorage both extend Storage. There is no difference between them except for the intended “non-persistence” of sessionStorage. That is, the data stored in localStorage persists until explicitly deleted. Changes made are saved and available for all current and future visits to the site. For sessionStorage, changes are only available per tab. Changes made … Read more
First of all, the one that has been deprecated by W3C is WebSQL not SQLite IndexedDB – It is incompatible with many types of mobile OS and is only compatible with certain types of versions of mobile OS Developers cannot use SQL with IndexedDB. They can with SQLite and WebSQL Most developers actively avoid using … Read more
In the (hopefully near) future, you’ll be You are now able to store stuff in chrome.storage.sync, and it will be synced automagically. Unless you need something right now, do consider putting all your configurations in an single object, sometime later you’ll be able to just sync it! Edit: now this is available in stable Chrome!
My question is it possible to store integer value inside localStorage as I can do for Javascript objects without typecasting? No. Storage objects are simple key-value stores, similar to objects, but they stay intact through page loads. The keys can be strings or integers, but the values are always strings. [source]
If you want to do something like that, you easily do that with the Chrome extensions API. The areas to look for are: Chrome Extension Tab API Chrome Extension Browser Action API HTML5 localStorage or HTML5 webdatabase Now the first step is to create your popup.html file and remember that it is transient, that is, … Read more
Here’s how to import/export your entire localStorage Export copy(JSON.stringify(localStorage)); This will copy your localStorage to your clipboard. (You need two JSON.stringify()’s to get the quotes escaped.) Import var data = JSON.parse(/*paste stringified JSON from clipboard*/); Object.keys(data).forEach(function (k) { localStorage.setItem(k, JSON.stringify(data[k])); });
As localStorage functionality seems to be limited to handle only string key/value pairs what you can do is to use lz-string library to stringify the json object and compress it before storing it in localStorage Usage // sample json object var jsonobj = {‘sample’: ‘This is supposed to be ling string’, ‘score’: ‘another long string … Read more