Caching is critical to modern apps, helping you serve data more quickly and improve your app’s overall performance. Effective caches can result in better Core Web Vitals (CWV), improved search visibility, and a smoother user experience.

Deciding which types of caches to use in your app can be challenging, especially for apps that rely heavily on JavaScript code. These apps often involve resource-intensive calculations, repeated API calls, or complex visualizations and animations, all of which come with performance costs. JavaScript caches can help you offset the performance impact of these complicated components and improve your app’s processing speed. Yet, with so many different types of data being processed, you may have to use a combination of caching methods to achieve the best results.

In this post, we’ll discuss common types of JavaScript caches, including which ones are best suited to dynamic data or static data or work well for both data types. We’ll also touch on how you can measure the success of your caching strategy.

JavaScript cache types

Caching data effectively means balancing multiple factors, including performance, freshness, and security. For example, serving the latest data means users get more accurate information. However, the frequent downloads necessary for doing so can cause significant latency, and your app may require more compute resources and higher network throughput to handle the volume of requests.