initial setup for js2 mode in emacs

setup-js2.el

(use-package js2-mode
 :ensure t
 :mode
 (("\\.m?js\\'" . js2-mode))
 :config
 (add-hook 'js2-mode-hook
           (lambda () (interactive) (column-marker-1 80)))
 ;; Better imenu
 (setq js2-mode-show-parse-errors nil)
 (setq js2-mode-show-strict-warnings nil)
 (add-hook 'js2-mode-hook
           #'js2-imenu-extras-mode)
 (add-hook 'js2-mode-hook
          (defun my-js2-mode-setup ()
            (flycheck-mode t)
            (when (executable-find "eslint")
              (flycheck-select-checker 'javascript-eslint))))
 :custom
 ;; (js2-global-externs '("customElements"))
 (js2-include-node-externs t)
 (js2-highlight-level 3)
 (js2r-prefer-let-over-var t)
 (js2r-prefered-quote-type 2)
 )



(use-package js2-refactor
  :ensure t
  :config
  (add-hook 'js2-mode-hook #'js2-refactor-mode)
  (js2r-add-keybindings-with-prefix "C-c C-r")
  (define-key js2-mode-map (kbd "C-k") #'js2r-kill)
  )

(use-package xref-js2
  :ensure t
  :config
  ;; js-mode (which js2 is based on) binds "M-." which conflicts with xref, so
  ;; unbind it.
  (define-key js-mode-map (kbd "M-.") nil)

  (add-hook 'js2-mode-hook
            (lambda ()
              (add-hook 'xref-backend-functions #'xref-js2-xref-backend nil t)))
  )


;; (use-package web-mode
;;  :ensure t
;;  :mode
;;  (("\\.jsx$" . web-mode))
;;  )