gistfile1.txt

(add-hook 'js-mode-hook '(lambda ()
  ;; /home/hvesalai/projects/foo/Bar.jsx: line 6, col 63

  (add-to-list 'compilation-error-regexp-alist-alist
             `(eslint-compact
               ,(rx line-start
                    (group (zero-or-one letter ":") (1+ (not (any ": "))))
                    ": line " (group (1+ digit))
                    ", col " (group (1+ digit)))
               1 2 3))

;; ReactifyError: /home/hvesalai/projects/foo/Bar.jsx: Parse Error: Line 89:

  (add-to-list 'compilation-error-regexp-alist-alist
               `(reactify-error
               ,(rx line-start (zero-or-more (any "0-9: ][")) "ReactifyError: "
                    (group (zero-or-one letter ":") (1+ (not (any ": "))))
                    ": Parse Error: Line " (group (1+ digit)))
               1 2))

  (setq compilation-error-regexp-alist '(reactify-error eslint-compact))

  (add-hook 'before-save-hook 'whitespace-cleanup)
))