unique hyperlink to an external style sheet

element, I came across this line in the header of a web page that was generated by a program. Any thoughts on what significance the number and ID serve in this stylesheet link?
<link rel="stylesheet" type="text/css" href="css/contact.css?4131768016" id="pagesheet"/>

Answer №1

The reason behind this approach is to prevent the client's browser from utilizing a cached stylesheet during page loading. The unique number is most likely created dynamically on the server side. Upon each page load, the number will vary, prompting the browser to recognize the stylesheet as distinct from the cached version and subsequently re-download it.

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