# Introduction In this Lab, we accompany Alex, a determined web developer at a bustling tech startup, who is now venturing into the realm of data persistence. After successfully creating a mechanism for tracking and displaying financial records in the personal finance tracker, the next challenge is to ensure that these records persist across browser sessions. The goal is to enable users to return to the app and find all their previously entered data intact, enhancing the app's usability and user satisfaction. This task introduces Alex to the concept of web storage, specifically leveraging the `localStorage` API to save and retrieve the application's state. In this Lab, you'll learn how to use `localStorage` to store data locally in the user's browser, allowing for data persistence in web applications. **Knowledge Points**: - `localStorage` usage - JSON serialisation and deserialisation (`JSON.stringify`, `JSON.parse`)
Click the virtual machine below to start practicing