Use Language Server Protocol completion where possible

.emacs.d/init.el

@@ -361,6 +361,7 @@
   :bind ("C-=" . er/expand-region))
 
 (use-package company-quickhelp :ensure
+  :disabled
   :config
   (company-quickhelp-mode 1)
   (setq company-quickhelp-delay 0.5))
@@ -427,6 +428,41 @@
   (bind-key "C-x 2" 'split-window-below-i3)
   (bind-key "C-x 3" 'split-window-right-i3))
 
+(use-package lsp-mode :ensure
+  :config
+  (use-package company-lsp :ensure
+    :config
+    (push 'company-lsp company-backends))
+
+  (use-package lsp-ui :ensure
+    :config
+    (setq lsp-ui-sideline-ignore-duplicate t)
+    (add-hook 'lsp-mode-hook 'lsp-ui-mode))
+
+  (use-package lsp-python
+    ;; requires python-language-server and/or python2-language-server
+    :hook (python-mode . lsp-python-enable))
+
+  (use-package lsp-java
+    ;; requires eclipse jdt language server ("jdtls" in arch)
+    :hook (java-mode . lsp-java-enable))
+
+  (use-package lsp-javascript-typescript
+    ;; Requires javascript-typescript-langserver installed locally
+    :hook ((js-mode . lsp-javascript-typescript-enable)
+           (typescript-mode . lsp-javascript-typescript-enable)
+           (js3-mode . lsp-javascript-typescript-enable)
+           (rjsx-mode . lsp-javascript-typescript-enable)))
+
+  (use-package lsp-html
+    ;; requires vscode-html-languageserver-bin
+    :hook ((html-mode . lsp-html-enable)
+           (web-mode . lsp-html-enable)))
+
+  (use-package lsp-css
+    ;; requires vscode-css-languageserver-bin
+    :hook ((css-mode . lsp-css-enable))))
+
 ;;;; optional external packages
 (use-package arduino-mode
   :mode "\\.pde\\'"
@@ -454,16 +490,6 @@
   :config
   (add-to-list 'company-backends 'company-c-headers))
 
-(use-package company-jedi
-  :init
-  (add-hook 'python-mode-hook (lambda()
-            (add-to-list 'company-backends 'company-jedi)
-            (jedi-mode)))
-  (setq jedi:use-shortcuts t
-        jedi:get-in-function-call-delay 500
-        jedi:tooltip-method nil)
-  :commands (jedi-mode))
-
 (use-package company-statistics
   :config
   (company-statistics-mode))
@@ -641,12 +667,6 @@
   :config
   (setq js2-basic-offset 2))
 
-(use-package company-tern
-  :config
-  (add-to-list 'company-backends 'company-tern)
-  (setq company-tern-property-marker "⚫")
-  :hook (js2-mode . tern-mode))
-
 (use-package nm
   :bind (:map nm-mode-map
               ("n" . nm-read)