secure-ls VS umd

idb-keyval is a great library for storing simple data in the browser using IndexedDB. secure-ls is great for storing data securely in Local Storage in the browser. There is also svelte-local-storage-store for saving and retrieving data to/from Local Storage in the browser easily with just a svelte store.

By https://github.com/softvar/secure-ls

Check out this fascinating GitHub project for more examples of UMD formats.

UMD (Universal Module Definition) is a set of tricky patterns to make your code file work in multiple environments.

Exports in a umd format so the library works everywhere.

A module format is the syntax we use to define a module. Different module formats such AMD, CommonJS, UMD and System.register have emerged in the past and a native module format is now available since ES6.

Supports circular references

To make UMD build available on both browsers and Node.js, set globalObject option to 'this'.

A modular system that your compiled application will use. You can choose: None, CommonJS, AMD, System, UMD, ES6, ES2015, ES2020 or ESNext. For backend apps/packages ES6 or CommonJS is suitable depending on Node.js version you want to support. For frontend apps ES6 is also suitable. And for support of older browsers and isomorphic applications, UMD is definitely worth choosing.