问题
Just for curiosity.
What is the better method to use and what is the difference between them ?
<link rel=stylesheet href="./css/css.css">
vs
<link rel=stylesheet href="css/css.css">
回答1:
In a relative URI, there is no difference between them.
Going without the ./ will save you 2 bytes, so it is marginally better.
In a UNIX style shell, leaving the ./ off will search $PATH while including it will search the current directory. Some people might be including the ./ out of habit from working on the shell.
回答2:
ultimately, there is no difference. They both produce the same link to the same file.
As Quentin just said, it saves you 2 bytes in storage, but I suppose even that doesn't really make a difference.
It just somes down to personal preference/coding style. I never use the ./, never found the use for it. However, people from linux might prefer it, since there it is used to indicate the current directory a lot.
来源：https://stackoverflow.com/questions/22761198/dot-slash-vs-nothing-what-is-the-difference-and-whats-better-to-use