Like every other programming environment, you need a place to store your data when coding in the browser with JavaScript. Beyond simple JavaScript variables, there are a variety of options ranging in sophistication, from using localStorage to cookies to IndexedDB and the service worker cache API. This article is a quick survey of the common mechanisms for storing data in your JavaScript programs.

You are probably already familiar with JavaScript’s set of highly flexible variable types. We don’t need to review them here; they are very powerful and capable of modeling any kind of data from the simplest numbers to intricate cyclical graphs and collections. 

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