Initial TypeScript setup and conversion (CJS to ESM, ES5 class functions to ES6 classes)

.gitignore

@@ -36,6 +36,9 @@ node_modules
 package-lock.json
 jspm_packages
 
+# TypeScript output
+lib/
+
 # Don't commit generated JS bundles
 examples/**/static/dist/bundle.js
 examples/**/dist

eslint.config.js

@@ -1,9 +1,10 @@
-const js = require("@eslint/js");
+const jsEslint = require("@eslint/js");
 const {
     defineConfig,
     globalIgnores,
 } = require("eslint/config");
 const eslintConfigGoogle = require('eslint-config-google');
+const tsEslint = require('typescript-eslint');
 
 // The ESLint ecmaVersion argument is inconsistently used. Some rules will ignore it entirely, so if the rule has
 // been set, it will still error even if it's not applicable to that version number. Since Google sets these
@@ -54,6 +55,7 @@ var SHAREDB_RULES = {
 module.exports = defineConfig([
     {
         extends: [eslintConfigGoogle],
+        files: ["**/*.js"],
         ignores: ['eslint.config.js'],
 
         languageOptions: {
@@ -67,6 +69,13 @@ module.exports = defineConfig([
 
         rules: Object.assign({}, DISABLED_ES6_OPTIONS, SHAREDB_RULES),
     },
+    {
+        extends: [
+            jsEslint.configs.recommended,
+            tsEslint.configs.recommended,
+        ],
+        files: ["**/*.ts"],
+    },
     globalIgnores(["docs/"]),
     {
         files: ["examples/counter-json1-vite/*.js"],

package.json

@@ -12,6 +12,7 @@
   },
   "devDependencies": {
     "@eslint/js": "^10.0.1",
+    "@types/node": "^24.12.0",
     "chai": "^6.2.2",
     "eslint": "^10.1.0",
     "eslint-config-google": "^0.14.0",
@@ -22,7 +23,9 @@
     "rich-text": "^4.1.0",
     "sharedb-legacy": "npm:sharedb@1.1.0",
     "sinon": "^21.0.3",
-    "sinon-chai": "^4.0.1"
+    "sinon-chai": "^4.0.1",
+    "typescript": "~6.0.2",
+    "typescript-eslint": "^8.58.0"
   },
   "files": [
     "lib/",