Currently in the web app you can type tag:tagname in the search field, and it displays all notes tagged tagname.
A nice improvement would be an autocomplete feature, similar to Slack.
Process:
tag.:, then a background color kicks in with new placeholder text:

Finished typing:

@drw158 and @rachelmcr suppose we want to add in support to search for notes without a tag and so we choose tag:untagged as the search string. It sounds silly, but how would we search for a note with the tag untagged?
Oh so you are saying what if the user adds a tag named 'untagged' to a note? Hopefully an edge case, but it's important to think about.
untagged, alongside the notes that have no tags.untagged.untagged tagGtiHub has some advanced search patterns like this. Maybe they have a similar problem?
I like option number 1 best. Not sure what the user would expect.
the first option seems reasonable. I would hope that it's a rare case but I'm going to try and see what all the other apps already do in this case before moving forward. it would be great to unify all the behaviors
You can already search for untagged notes in the web app by typing tag:untagged and I just tested to see what would happen if I made "untagged" a tag for one note. It wasn't returned in the search results.
I like the first option too - where both untagged notes and notes with the tag "untagged" are returned but this is not how it works in the web app. Right now it's not possible to search for notes with the tag "untagged". If we make it possible to do this in the Electron app can we also implement it for the web app?
This won't make it in for v1.1.0 but we can hopefully get it in later.
Would you consider please that the keyword for searching tags would be t:. So I could search with less typing.
Or It could be an alias for tag:.
A user has reported that the tag search is case sensitive. For example, if the tag is _BobDylan_, searching for _bobdylan_ will not find any results. It also doesn't find partial matches. Is it worth changing this to support partial matches and also removing the case requirement?
This is not available in 1.1.7 yet. Will it land ?
@charlesinc3 Unfortunately no, we haven't implemented this yet. I'm hoping we can work on improving the search features sometime next year.
Searching for untagged notes in the Windows app specifically requested in #1430868-zen
as well as an easier way to search for multiple tags
I also wanted to add my vote to #716 (folded into #54 here). It would be great to have an "Untagged" button. Doesn't even need to be a search feature - just an "Untagged" item at the end of the list of tags would be fantastic!
Adding another vote for the tag:untagged search. Used to work only in the web version — which now doesn't seem to work any more, sadly.
Context: I use this for a weekly review of any new notes that I haven't tagged yet. A bit like an "inbox" and then sort by anything not yet "processed" with a tag.
The ability to select untagged notes is something we are working on. Closing this as tag autocompletion is currently in the app.
@belcherj There's a somewhat different idea buried in here, which is autocomplete in the text field (different than suggestions). Maybe an open issue isn't the right place to make sure it doesn't get lost.
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I also wanted to add my vote to #716 (folded into #54 here). It would be great to have an "Untagged" button. Doesn't even need to be a search feature - just an "Untagged" item at the end of the list of tags would be fantastic!