Display trailing whitespace in red

[yogsototh]

Hi! Is there a way to display trailing whitespace in red?

like here:

I only found a way to delete them and I can't even see whitespace anymore using the last version apparently.

Thanks!

[syl20bnr]

They should be highlighted by default, what is the major mode you are using ?

[yogsototh]

You're right, it works perfectly when I edit files with in deft, but they are hidden when I code in clojure.
I believe the major mode might be cider-mode.

[syl20bnr]

We only display them in prog modes I believe and chances are cider-mode does not derive from prog-mode.

[yogsototh]

I know this is closed but here is something that worked for me. I added this in my dotspacemacs/user-config:

  ;; SHOW TRAILING WHITESPACE
  (require 'whitespace)
  (setq-default whitespace-style '(face trailing))
  (setq-default whitespace-line-column 80)   
  (global-whitespace-mode 1)

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