Angular Local Storage

Introduction – Basic Information About Angular Local Storage

Web browsers store data in a key-value pair feature using storage APIs. These storage APIs offer local and session storage. Session storage holds data when a web browser tab is open, but when the browser or tab is closed, the data is discarded. On the other hand, local storage has a large storage capacity and keeps user data even after a session is ended (Noro, 2022). The stored data can be cleared by deleting the browser’s cache or using an application code. Data storage functionality is a very powerful feature and it is associated with imminent risks. This article discusses some of these risks and how to use local storage with Angular.

Risks And Angular Local Storage

Amateur web developers are tempted to store sensitive data on the web browser. This type of information can be exploited to gain access to private data. Web storage should not be used to hold sensitive information either locally or during sessions. Local storage functions in Angular can be accessed by using third-party libraries, calling the localStorage API, developing a service layer that hides the session storage (Noro, 2022). Calling the localStorage API function is the quickest. User data is stored using a key-value pair by using the inbuilt setItem() function. This approach is useful when using a small Angular application, and it poses threats to testing when scaling up to a larger application is needed.

Creating a service layer to abstract eliminates the above issues. The service layer displays the sub-routines for running the localStorage API. Through dependency injection, changes made in one area, are reflected in all the components using the service. With necessary adjustments, components can be reused with the local storage provider rather than directly using the localStorage API. Testing is easier with no direct operations with the local storage values.


Storage functionalities offered by web API are very useful for improving the user experience. These functionalities also come with risks involved. Novice and experienced users should always put in mind that sensitive data should not be stored in local storage or session storage either. Any information or data on the client-side can be easily exploited and tampered with.

Auxiliary Materials And Articles Worth Reading.

M., & Noro, H. (2022). Managing Local Storage in Angular ?. Retrieved 24 March 2022, from site

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