ZDOTDIR=$XDG_DATA_HOME/zsh
HISTFILE=$ZDOTDIR/history
Since there are a bunch of plugins in the ZDOTDIR folder besides the .zshrc file, it seems a bit inappropriate to set the ZDOTDIR folder to the XDG_CONFIG_HOME folder.
And history is not a session file, I think it is not appropriate to place it in the XDG_STATE_HOME folder, is this setting reasonable?
In fact, the fcitx5 input method puts more lexicon files and a configuration file under the XDG_DATA_HOME folder, which seems to be similar to the ZSH scene. XDG_DATA_HOME should be used to store files similar to history or useful data, from the convenience From the point of view, it can also be used for mixed storage of a small amount of configuration files and data files.
XDG_CONFIG_HOME should be used to store configuration files from the name, XDG_DATA_HOME should store useful data, XDG_STATE_HOME should be used to store session files that are not particularly useful, and XDG_CACHE_HOME is used to store cache files that are completely unnecessary to delete.
This is how I understand it, what do you think?
May i ask in which files you got those lines from?
As a general idea, i think the “Mailing-lists” or “IRC” channels mentioned at https://zsh.sourceforge.io/ would be a better place to ask about these kind of stuff from the ZSH maintainers right?
Because i think all distros use their sources with these kind of configs.
Again i’m not sure where you got those lines, so i can’t really comment on your ideas at moment…
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The code was obtained a year ago from a gist page, and I also got some plugins, of course, the use of the XDG directory is only my personal opinion, I have no idea if it is correct.
Then I’m using zi plugin manager.
Didn’t it occur to you then that asking that to the maker of that gist instead?
Because it is obviously something that code uses in it’s logic then 
Because the default install on Manjaro doesn’t use those, it uses the defaults from the zsh package itself…
See man zshall
When it comes to the usage of those XDG_xxxx variables you should consult the specs for how they are meant to be used:
I was actually tweaking the mess of hidden files and folders in my home directory following archwiki’s XDG page, and I looked at the XDG specification, but the actual software developers’ practices were a bit confusing.