What is Keyva?

Keyva is a feather-weight zero-dependency TypeScript library that gives you key/value access to IndexedDB. It's as easy to use as localStorage, but still manages to expose a lot of the power of IndexedDB, such as complex object storage, binary data storage, indexes, and querying.

Why Keyva?

There are many existing IndexedDB abstractions. While these projects meet some definition of functional, a library design aficionado like myself finds them insufficiently elegant. This matters. Especially for a key/value access layer which is going to be used in literally every app one might build.

Some libraries have that it factor where a significant amount of thought was obviously given to the interface, rather than only the internals. These libraries place a very high value on ergonomics, simplicity, naming, cognitive load minimization, and achieving the best possible Intellisense experience. These libraries have staying power. They're the type you keep reaching for year after year.

I didn't find any key/value access layer that inspired this level of confidence. So I designed one that does.

Features

• Simple like localStorage, but powerful like IndexedDB.
• Feather-weight. Only 1.5KB zipped + minified.
• Zero dependencies
• Written in TypeScript. Code is commented and readable.

Installation

Installation via npm:

npm install keyvajs --save

Script tag installation:

<script src="https://cdn.jsdelivr.net/npm/keyvajs/keyva.min.js"></script>

Or just download the Keyva.ts file and add it directly to your project.

Usage

Start by creating a Keyva object, which creates a new IndexedDB database with a default name:

const kv = new Keyva();

The Keyva class only has 4 methods: .get(), .set(), .delete(), and .each(). These methods have a few overloads, but otherwise, this is essentially the entire library.

// Writing
await kv.set("some-key", "some-value");

// Reading
const value = await kv.get("some-key");

// Deleting
await kv.delete("some-key");

// Iteration
for (const [key, value] of await kv.each()
{
	// Do stuff
}

Advanced Usage

Get all keys and values from a Keyva:

const all = await kv.get();

Get multiple values at once:

const all = await kv.get(["key1", "key2"]);

Set multiple values at once:

await kv.set([["k0", "v0"], ["k1", "v1"], ["k2", "v2"]]);

For more complete usage examples, see the tests file

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