Is there any way to remove extra white space in JSX classname strings?

prettier-plugin-tailwindcss has been able to trim the classname to remove whitespace but now it no longer can. Check this Github issue

You can use an extension like Run On Save.

Configure your settings.json some rule: Auto run command from vscode extension on file save

And the pattern will be something like:

regular expression to remove space inside quotations

"emeraldwalk.runonsave": {
    "commands": [
        {
            "match": "\\.tsx$",
           "cmd": "perl -i -pe 's/\\b\\s{2,}\\b/ /g' ${file}"
        }
    ]
}