Enumeration
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Get source code, find out of all links, go that links, scan content of those links, what version it has, find out GitHub repository of that lib, and what is latest issues have informed and fixed, latest versions issues.
which technolgies has used -programming languages etc.list of objects
sitemap,robots.txt,do spidering.explore js libraries,lib-versions, open-source files of lib and follow current issues on Github and exploit the web using the newest current issue on the lib. take advantage of them.
look into inspect element html,jscode and analysis ,get errors on the console put the debugger and wait for sometimes maybe you will find out some important URLs and errors.
Backend: Some frameworks have characteristic file extensions or URL patterns that can give you a clue about what's being used. For example, websites built with ASP.NET often have URLs that end in ".aspx," while websites built with Django often have URLs that end in "/admin/."
The HTTP response headers can sometimes reveal information about the back-end framework being used. For example, the "X-Powered-By" header is sometimes used by frameworks to identify themselves.
The source code of a website can sometimes reveal information about the back-end framework being used. For example, you might see comments left by developers that identify the framework being used, or you might see specific code patterns that are associated with a particular framework.
There are a number of website fingerprinting tools available that can help you identify the back-end framework being used on a website. These tools work by analyzing the website's code, headers, and other data to identify patterns that are associated with known frameworks.
X-Content-Type-Options https://securityheaders.com/
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