How to debug missing tailwind classes?

[bilogic]

For all tailwind versions, it has always been arduous ordeal of trial and error for me, anyway to get tailwind to show useful debug logs?

I have already added @source @import, even Gemini could not solve it.

[psupra22]

[bilogic]

DEBUG=tailwindcss:* ./tailwindcss -i resources/css/app.css -o a.css --verbose --watch
≈ tailwindcss v4.1.12

Done in 5s

[5933.96ms] [@tailwindcss/cli] (initial build)
[ 142.62ms]   ↳ Setup compiler
[1964.39ms]   ↳ Scan for candidates
[ 358.45ms]   ↳ Build CSS
[   7.52ms]   ↳ Write output

I used the direct executable from GitHub. Do you know where are the logs?

[bilogic]

With tailwindcss alone, I don't see --verbose flag

$ ./tailwindcss 
≈ tailwindcss v4.1.12

Usage:
  tailwindcss [--input input.css] [--output output.css] [--watch] [options…]

Options:
  -i, --input ················· Input file
  -o, --output ················ Output file [default: `-`]
  -w, --watch[=always] ········ Watch for changes and rebuild as needed, and use `always` to keep watching when stdin is closed
  -m, --minify ················ Optimize and minify the output
      --optimize ·············· Optimize the output without minifying
      --cwd ··················· The current working directory [default: `.`]
      --map ··················· Generate a source map [default: `false`]
  -h, --help ·················· Display usage information

[bilogic]

With npx, the log shows errors /home/user/.npm/_logs/2025-09-01T04_24_39_731Z-debug-0.log

0 verbose cli /usr/local/bin/node /usr/local/lib/node_modules/npm/bin/npm-cli.js
1 info using [email protected]
2 info using [email protected]
3 silly config load:file:/usr/local/lib/node_modules/npm/npmrc
4 silly config load:file:/project/current/.npmrc
5 silly config load:file:/home/user/.npmrc
6 silly config load:file:/usr/local/etc/npmrc
7 verbose title npm exec tailwindcss -i resources/css/app.css -o a.css --verbose
8 verbose argv "exec" "--" "tailwindcss" "-i" "resources/css/app.css" "-o" "a.css" "--verbose"
9 verbose logfile logs-max:10 dir:/home/user/.npm/_logs/2025-09-01T04_24_39_731Z-
10 verbose logfile /home/user/.npm/_logs/2025-09-01T04_24_39_731Z-debug-0.log
11 silly logfile start cleaning logs, removing 1 files
12 silly logfile done cleaning log files
13 silly packumentCache heap:4496293888 maxSize:1124073472 maxEntrySize:562036736
14 verbose shrinkwrap failed to load node_modules/.package-lock.json out of date, updated: node_modules
15 verbose stack Error: could not determine executable to run
15 verbose stack     at getBinFromManifest (/usr/local/lib/node_modules/npm/node_modules/libnpmexec/lib/get-bin-from-manifest.js:17:23)
15 verbose stack     at exec (/usr/local/lib/node_modules/npm/node_modules/libnpmexec/lib/index.js:205:15)
15 verbose stack     at async Npm.exec (/usr/local/lib/node_modules/npm/lib/npm.js:208:9)
15 verbose stack     at async module.exports (/usr/local/lib/node_modules/npm/lib/cli/entry.js:67:5)
16 verbose pkgid [email protected]
17 error could not determine executable to run
18 verbose cwd /project/current
19 verbose os Linux 6.8.12-11-pve
20 verbose node v24.6.0
21 verbose npm  v11.5.1
22 verbose exit 1
23 verbose code 1
24 error A complete log of this run can be found in: /home/user/.npm/_logs/2025-09-01T04_24_39_731Z-debug-0.log

[bilogic]

Sorry, but your replies are complete opposites from one to the next almost like an AI, can you show your verbose debug output?

[bilogic]

@psupra22 Please kindly remove all those AI answers, they do not work and only add noise to this discussion