jquery-1兼容性最好
jquery-2，jquery-3在使用ajax时会提示
TypeError: Failed to execute 'setRequestHeader' on 'XMLHttpRequest': Value is not a valid ByteString.

https://jquery.com/download/

cdn

https://code.jquery.com/
https://code.jquery.com/jquery-1.12.4.min.js
https://code.jquery.com/jquery-2.2.4.min.js
https://code.jquery.com/jquery-3.6.0.min.js

https://docs.microsoft.com/en-us/aspnet/ajax/cdn/overview#jQuery_Releases_on_the_CDN_0
https://ajax.aspnetcdn.com/ajax/jQuery/jquery-3.6.0.min.js
https://ajax.aspnetcdn.com/ajax/jQuery/jquery-2.2.4.min.js
https://ajax.aspnetcdn.com/ajax/jQuery/jquery-1.12.4.min.js