Try eglot with flymake instead flycheck.

configs/init-eglot.el

@@ -17,7 +17,7 @@
   ;; (add-to-list 'eglot-server-programs '(css-mode . ("vscode-css-language-server" "--stdio")))
   ;; (add-to-list 'eglot-server-programs '(html-mode . ("vscode-html-language-server" "--stdio")))
 
-  (add-hook 'eglot--managed-mode-hook (lambda () (flymake-mode -1)))
+  ;; (add-hook 'eglot--managed-mode-hook (lambda () (flymake-mode -1)))
 )
 
 ;; Emmet (mientras veo como hacer funcionar emmet-ls)

configs/init-extensions.el

@@ -73,22 +73,6 @@
         doom-modeline-indent-info nil
         doom-modeline-persp-name t))
 
-;; Revisar sintaxis en vivo
-(use-package flycheck
-  ;; :diminish flycheck-mode
-  :defer t
-  :straight t
-  :hook (prog-mode . (lambda ()
-                        (unless (derived-mode-p 'makefile-mode)
-                          (flycheck-mode))))
-  )
-
-;; Mostrar los errores de flycheck en un pop up
-(use-package flycheck-popup-tip
-  :defer t
-  :straight t
-  :hook (flycheck-mode . flycheck-popup-tip-mode))
-
 ;; Git Gutter - Marca a la izq. si una linea ha sido agregada, editada o eliminada desde el último commit.
 (use-package git-gutter
   :defer t

configs/init-lsp.el

@@ -246,5 +246,22 @@
       (push 'lsp-treemacs-symbols-mode aw-ignored-buffers)
       (push 'lsp-treemacs-java-deps-mode aw-ignored-buffers))))
 
+
+;; Revisar sintaxis en vivo
+(use-package flycheck
+  ;; :diminish flycheck-mode
+  :defer t
+  :straight t
+  :hook (prog-mode . (lambda ()
+                        (unless (derived-mode-p 'makefile-mode 'js-mode)
+                          (flycheck-mode))))
+  )
+
+;; Mostrar los errores de flycheck en un pop up
+(use-package flycheck-popup-tip
+  :defer t
+  :straight t
+  :hook (flycheck-mode . flycheck-popup-tip-mode))
+
 (provide 'init-lsp)
 ;;; init-lsp.el ends here

init.el

@@ -43,8 +43,8 @@
 (require 'init-extensions)
 (require 'init-functions)
 (require 'init-org)
-(require 'init-lsp)
-;; (require 'init-eglot)
+;; (require 'init-lsp)
+(require 'init-eglot)
 (require 'init-company)
 (require 'init-treemacs)
 ;;(require 'init-ctags)