install-jsxhint.sh

npm install -g jsxhint

setup-jsxhint.el

(define-derived-mode jsx2-mode js2-mode "jsx2" "JSX mode based on js2")

(add-to-list 'auto-mode-alist '("\\.jsx$" . jsx2-mode))

(require 'flycheck)
            
(flycheck-define-checker jsxhint-checker
  "A JSX syntax and style checker based on JSXHint."

  :command ("jsxhint" (config-file "--config=" jshint-configuration-path) source)
  :error-patterns ((error line-start (1+ nonl) ": line " line ", col " column ", " (message) line-end))
  :modes (jsx-mode jsx2-mode))

(defun find-jshintrc ()
  (expand-file-name ".jshintrc"
                    (locate-dominating-file
                     (or (buffer-file-name) default-directory) ".jshintrc")))
            

(defun setup-jsxhint ()
  (setq-local jshint-configuration-path (find-jshintrc))
  (flycheck-select-checker 'jsxhint-checker)
  (flycheck-mode))

(add-hook 'jsx2-mode-hook 'setup-jsxhint)
(add-hook 'jsx-mode-hook 'setup-jsxhint)