dev: suppoprt typescript

.eslintrc.js

@@ -1,38 +1,48 @@
 module.exports = {
-    root: true,
+  root: true,
+  parserOptions: {
+    parser: 'babel-eslint',
+    ecmaVersion: 2018,
+    sourceType: 'module'
+  },
+  plugins: ['html'],
+  env: {
+    browser: true,
+    node: true
+  },
 
-    parserOptions: {
-        parser: 'babel-eslint',
-        ecmaVersion: 2018,
-        sourceType: 'module'
-    },
-    plugins: ['html'],
-    env: {
-        browser: true
-    },
+  rules: {
+    indent: ['error', 2, { SwitchCase: 1 }],
+    'space-infix-ops': ['error', { int32Hint: false }],
+    'key-spacing': [
+      2,
+      {
+        beforeColon: false,
+        afterColon: true
+      }
+    ],
+    'no-octal': 2,
+    'no-redeclare': 2,
+    'comma-spacing': 2,
+    'no-new-object': 2,
+    'arrow-spacing': 2,
+    quotes: [
+      2,
+      'single',
+      {
+        avoidEscape: true,
+        allowTemplateLiterals: true
+      }
+    ]
+  },
+  overrides: [
+    {
+      files: ['**/*.ts'],
+      parser: '@typescript-eslint/parser',
+      extends: [
+        'plugin:@typescript-eslint/recommended' // Uses the recommended rules from the @typescript-eslint/eslint-plugin
+      ],
 
-    rules: {
-        indent: ['error', 2, { SwitchCase: 1 }],
-        'space-infix-ops': ['error', { int32Hint: false }],
-        'key-spacing': [
-            2,
-            {
-                beforeColon: false,
-                afterColon: true
-            }
-        ],
-        'no-octal': 2,
-        'no-redeclare': 2,
-        'comma-spacing': 2,
-        'no-new-object': 2,
-        'arrow-spacing': 2,
-        quotes: [
-            2,
-            'single',
-            {
-                avoidEscape: true,
-                allowTemplateLiterals: true
-            }
-        ]
     }
+  ]
 }

package.json

@@ -43,12 +43,15 @@
     "request": "^2.88.0"
   },
   "devDependencies": {
-    "eslint": "7.8.1",
+    "@typescript-eslint/eslint-plugin": "^4.0.1",
+    "@typescript-eslint/parser": "^4.0.1",
+    "eslint": "^7.8.1",
     "eslint-plugin-html": "6.0.3",
     "husky": "4.2.5",
     "intelli-espower-loader": "1.0.1",
     "lint-staged": "10.2.11",
     "mocha": "8.1.3",
-    "power-assert": "1.6.1"
+    "power-assert": "1.6.1",
+    "typescript": "^4.0.2"
   }
 }

tsconfig.json

@@ -0,0 +1,30 @@
+{
+    "compilerOptions": {
+      "target": "ES2015",
+      "module": "commonjs",
+      "experimentalDecorators": true,
+      "moduleResolution": "node",
+      "lib": [
+        "esnext",
+        "esnext.asynciterable",
+        "dom"
+      ],
+      "esModuleInterop": true,
+      "allowJs": true,
+      "sourceMap": true,
+      "strict": true,
+      "noEmit": true,
+      "baseUrl": ".",
+      "paths": {
+        "~/*": [
+          "./*"
+        ],
+        "@/*": [
+          "./*"
+        ]
+      },
+    },
+    "exclude": [
+      "node_modules"
+    ]
+  }