From 71fab635ea3d8bd9996e4c97681e2c26a5cacc9f Mon Sep 17 00:00:00 2001
From: Matthew Kosarek <mattkae@protonmail.com>
Date: Sun, 16 Oct 2022 09:49:00 -0400
Subject: Eslint mode for Javascript

---
 init.el      |  1 +
 lisp/json.el | 15 ++++++++++++---
 lisp/web.el  | 44 ++++++++++++++++++++++++++++++++------------
 3 files changed, 45 insertions(+), 15 deletions(-)

diff --git a/init.el b/init.el
index 56bf349..0b8051a 100644
--- a/init.el
+++ b/init.el
@@ -51,6 +51,7 @@
 (require 'json)
 (require 'markdown)
 (require 'lisp)
+(require 'json)
 
 (custom-set-variables
  ;; custom-set-variables was added by Custom.
diff --git a/lisp/json.el b/lisp/json.el
index f65b7b8..d1093cf 100644
--- a/lisp/json.el
+++ b/lisp/json.el
@@ -1,8 +1,17 @@
 
 ;;; Code:
-(autoload 'json-mode "json-mode"
-  "Use the json-mode package to provide 'json-mode on-demand."
-  t)
+(add-to-list 'auto-mode-alist '(".eslintrc'" . json-mode))
+
+(require 'flycheck)
+(flycheck-add-mode 'json-jslint 'json-mode)
+
+(defun my-json-mode-hook ()
+	"Turn off eglot in JSON mode."
+	(require 'eglot)
+	(flymake-mode 0)
+	)
+
+(add-hook 'json-mode-hook 'my-json-mode-hook)
 
 (provide 'json)
 ;;; json.el ends here
diff --git a/lisp/web.el b/lisp/web.el
index 655dd03..a1d9598 100644
--- a/lisp/web.el
+++ b/lisp/web.el
@@ -16,24 +16,22 @@
 (add-to-list 'auto-mode-alist '("\\.php\\'" . web-mode))
 
 ;; JavaScript
-(require 'js2-mode)
-(add-to-list 'auto-mode-alist '("\\.js\\'" . js2-mode))
-(push '("\\.js[x]?\\'" . js2-mode) auto-mode-alist)
-(add-hook 'js2-mode-hook #'js2-imenu-extras-mode)
+(add-to-list 'auto-mode-alist '("\\.js\\'" . javascript-mode))
+(push '("\\.js[x]?\\'" . javascript-mode) auto-mode-alist)
 
 (defun setup-js2-mode()
   "Hooks for Javscript 2 Mode."
   (setq js-indent-level 2)
   (company-mode t)
-  (company-quickhelp-mode t)
   (smartparens-mode 1)
 )
-(add-hook 'js2-mode-hook 'setup-js2-mode)
-(setq js2-highlight-level 3)
-(setq js2-idle-timer-delay 0.1)
+(add-hook 'js-mode-hook 'setup-js2-mode)
+;(setq js2-highlight-level 3)
+;(setq js2-idle-timer-delay 0)
 
-;; Tide for refactoring
+;; TypeScript
 (defun setup-typescript()
+	"Set up tiny things for TypeScript."
   (setq typescript-indent-level 2)
   (company-mode t)
   (company-quickhelp-mode t)
@@ -47,8 +45,30 @@
           (lambda ()
             (when (string-equal "tsx" (file-name-extension buffer-file-name))
               (setup-typescript))))
-;; enable typescript-tslint checker
-(flycheck-add-mode 'typescript-tslint 'web-mode)
+
+;; Eslint through Flycheck.
+(require 'flycheck)
+(setq-default flycheck-disabled-checkers
+							(append flycheck-disabled-checkers
+											'(javascript-jshint)))
+(setq-default flycheck-disabled-checkers
+							(append flycheck-disabled-checkers
+											'(json-jsonlist)))
+(flycheck-add-mode 'javascript-eslint 'js-mode)
+(flycheck-add-mode 'typescript-tslint 'typescript-mode)
+; use local eslint from node_modules before global
+; http://emacs.stackexchange.com/questions/21205/flycheck-with-file-relative-eslint-executable
+(defun my-use-eslint-from-node-modules ()
+	"Use eslint from local node_modules instead of globally."
+  (let* ((root (locate-dominating-file
+                (or (buffer-file-name) default-directory)
+                "node_modules"))
+         (eslint (and root
+                      (expand-file-name "node_modules/eslint/bin/eslint.js"
+                                        root))))
+    (when (and eslint (file-executable-p eslint))
+      (setq-local flycheck-javascript-eslint-executable eslint))))
+(add-hook 'flycheck-mode-hook #'my-use-eslint-from-node-modules)
 
 ;; Package management
 (use-package eglot
@@ -57,7 +77,7 @@
   :ensure t
   :defer 3
   :hook
-  ((js2-mode typescript-mode) . eglot-ensure))
+  ((js-mode typescript-mode) . eglot-ensure))
   :config
   (cl-pushnew '((js-mode typescript-mode) . ("typescript-language-server" "--stdio"))
               eglot-server-programs
-- 
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