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Home Tech

What is Browser Cache, and how it works?

by Deepika Gupta
June 15, 2022
in Tech
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A “browser cache” collection of files is used to store downloaded internet resources. Images, text material, HTML, Javascript, and CSS are frequently found items in a browser cache. The browser cache is quite small compared to the several different kinds of databases used for webpages.

In general, a cache is a piece of hardware or software that gathers and saves data so that the user may quickly access it in the future.

Simply defined, a browser cache retains information from the website’s users’ visit in a database, which speeds up page loads (particularly with a poor or unreliable internet connection) and enhances the user experience for the next time users visit a previously visited website.

Some of the most common site resources that are cached by the browser include:

  • Written text, pictures, videos, and coding files are examples of website data and assets that allow a website to load more quickly in the future and allow users to see some of its content while offline.
  • The efficiency of viewing pages offline is increased by documents from web applications.
  • Valuable or frequent website activities, such as products left added in a shopping cart or automatic login credentials.
  • In general, individual user preferences for particular websites or the internet. For example, Users might change the text size, typographic style, color palette, or browser zoom.

How does a browser Cache work?

Here’s a more detailed explanation of how a browser cache works:

The browser requests the web server for information, most likely from a website.

A request is:

  • The browser searches its cache and database simultaneously. It assesses whether any previously cached information from the requested page exists (stored inside the cache).
  • If the browser doesn’t already cache the requested data, the web server sends it right away. It is known as a response.
  • Our browser dismisses the server and downloads the requested content from its cache if it is present in the browser cache.

The data in the cache must not only be accurate for the intended URL but also cannot be called “stale.” The browser could run into outdated cached content since practically all cached data has an expiry date. Given how frequently site information is updated, keeping track of and showing consumers obsolete stuff would be negligent. The intention is for the browser to only present information that is almost identical to that found on the main website. The browser generally pulls information from its cache when it is not stale and comes from the requested website.

We covered the kinds of information that are kept in a browser cache, but it’s also important to note that client-side caching keeps track of that data using a few different kinds of packets and databases. Fundamentally, the browser cache stores files like login information, user preferences, and website content. However, these resources are kept in a database via more complicated processes, such as cookies, IndexedDB APIs, Web Storage APIs, and Cache APIs.

Tags: Browser CacheTechnology
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