![]() The cache busting happens when an update is made to the site, instigating an update to the file hashes which causes the browser to recognize the updated files as new files allowing these files to download to the browser despite the cache expiration date. The first time the site loads, all these files are transferred into the browser cache and set to expire in one year. These individualizers are auto-generated using a command line tool. This number is the differentiator that will change with each update to the site. ![]() The numbers tacked on the to the end of each name is the file hash. Here is what this looks like: first generate file hashes for each different cached file. Renaming your files automatically with each change to your site says these files will be recognized as new and push to the browser. This generation means when a file is revised the file hash automatically updates to reflect the renovated contents. A file hash is a unique number generated from the contents of a file. This fix may sound unnecessarily complicated at first, but there are tools you can use to create a file hash, which eliminates the need to rename your files manually. You can enable this by renaming your files every time you make an update to your site. There is a better solution for this, cache busting, which forces the browser to download new files. The second solution is to change the server settings to invalidate the previous cache files and push new files, though this process defeats the purpose of setting up a cache in the first place. The first, and most unlikely, is the visitor will think to clear his or her cache. There are two solutions to rectify this problem. Regardless of any updates made to your files, a second-time visitor will not experience these amendments until the browser cache expires. For example, if your HTML, JavaScript, or CSS are noted to be cached for a year, the browser will ignore new versions of these files, after these are initially downloaded, for the designated time frame. This process is the best solution to maintain a quick download speed for visitors, but a problem arises when files are marked for further caching in the future. Placing the data in the visitor’s browser prevents assets from downloading every single visit. Upon first visiting all necessary files are downloaded into the visitor’s browser. Caching is a simple process used to enhance the user experience when someone visits your website.
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