Resolving cached CSS and JS files through the use of local storage

My customers frequently express frustration over not seeing the improvements I've made to my CSS or JS effects. The issue seems to be related to cached files.
Perhaps this code snippet could provide a solution: 

$(document).ready(function(){
    var currentStatus = 0;
    var previousStatus = localStorage.getItem('clear');
    if (currentStatus !== previousStatus) {
        localStorage.setItem('clear', currentStatus);           
        window.location.reload(true);
    }
});

The next time I modify the css or js, the value of var currentStatus will switch to 1.
After that, it will revert back to 0 and so forth.

I have yet to test this method, but it appears straightforward and should be effective.
Can you spot any potential drawbacks?

javascript

Answer №1

In my opinion, a simple solution is to add the version as a GET parameter in the URL:

<link rel="stylesheet" href="style.css?v=2017-12-29-01">
<script src="script.js?v=2017-12-29-01" type="text/javascript"></script>

This method has no adverse effects and does not require the page to be reloaded.

EDITED: After reviewing an interesting link shared by the OP, it appears that my approach may not be universally applicable. Some proxies may be set up to not cache URLs with querystrings:

Revving Filenames: don’t use querystring

The proposed solution is to revise the filename itself by including the file's timestamp or version number in the URL. However, what is preferable: mylogo.1.2.gif or mylogo.gif?v=1.2? To ensure effective caching by popular proxies, it is advised to avoid revision using a querystring and instead modify the filename directly.

The author concludes:

Proxy administrators have the option to adjust configurations to enable caching of resources with a querystring, based on caching headers indications. Nevertheless, web developers should anticipate encountering the default configuration more frequently. ... For users behind proxies, minimizing the use of querystrings for cacheable resources can contribute to a faster browsing experience

In light of this information:

<link rel="stylesheet" href="style-2017-12-29-01.css">
<script src="script-2017-12-29-01.js" type="text/javascript"></script>

Answer №2

The issue appears to be with the strict equality check. Consider updating it to the following:

if (a !== b) {

Alternatively, you can ensure that the value fetched from local storage is converted to a number before comparing.

var b = +(localStorage.getItem('clear'));

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