Fix (?) LSP config

.dir-locals.el

@@ -9,9 +9,14 @@
                     "node_modules/typescript/lib/tsserver.js"))
            ;; For LSP:
            (require 'lsp-javascript)
-           (lsp-dependency 'typescript
+           (let ((node-modules (concat
-                           `(:system ,(concat
+                                (let ((d (dir-locals-find-file ".")))
-                                       (let ((d (dir-locals-find-file ".")))
+                                  (if (stringp d) d (car d)))
-                                         (if (stringp d) d (car d)))
+                                "node_modules/")))
-                                       "node_modules/typescript/lib/tsserver.js"))))
+             (lsp-dependency 'typescript-language-server
+                             `(:system ,(concat node-modules
+                                                "typescript-language-server/lib/cli.js")))
+             (lsp-dependency 'typescript
+                             `(:system ,(concat node-modules
+                                                "typescript/lib/tsserver.js")))))
       ))))

package.json

@@ -18,6 +18,7 @@
     "ts-jest": "^27.0",
     "ts-node": "^10.4",
     "ts-node-dev": "^1.1",
-    "typescript": "^4.5"
+    "typescript": "^4.5",
+    "typescript-language-server": "^0.8"
   }
 }

packages/ts-plugin/README.md

@@ -128,6 +128,30 @@ you like:
       ))))
 ```
 
+Finally, I've had some trouble with LSP when I've not had
+`typescript-language-server`, which is different to `tsserver` (?),
+installed. Then, I've had to install the `typescript-language-server`
+npm package, as well as `typescript`, and to take an approach similar
+to this to point LSP at it:
+
+```elisp
+((typescript-mode
+  . ((eval
+      . (progn
+           (require 'lsp-javascript)
+           (let ((node-modules (concat
+                                (let ((d (dir-locals-find-file ".")))
+                                  (if (stringp d) d (car d)))
+                                "node_modules/")))
+             (lsp-dependency 'typescript-language-server
+                             `(:system ,(concat node-modules
+                                                "typescript-language-server/lib/cli.js")))
+             (lsp-dependency 'typescript
+                             `(:system ,(concat node-modules
+                                                "typescript/lib/tsserver.js")))))
+      ))))
+```
+
 ### Visual Studio Code
 
 After `yarn install`, if you have a `node_modules/typescript`