Add pre commit hooks and fix eslint errors

.eslintignore

@@ -0,0 +1,4 @@
+# don't ever lint node_modules
+node_modules
+# don't lint build output (make sure it's set to your correct build folder name)
+dist

.eslintrc.js

@@ -0,0 +1,12 @@
+module.exports = {
+    root: true,
+    parser: '@typescript-eslint/parser',
+    plugins: [
+        '@typescript-eslint',
+    ],
+    extends: [
+        'eslint:recommended',
+        'plugin:@typescript-eslint/recommended',
+        'prettier',
+    ],
+};

.github/workflows/main.yml

@@ -1,10 +1,6 @@
 name: Node.js CI
 
-on:
-  push:
-    branches: [master]
-  pull_request:
-    branches: [master]
+on: [push]
 
 jobs:
   build:
@@ -20,6 +16,8 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
-      - run: npm install
-      - run: npm run build
-      - run: npm test
+        run: |
+          npm install
+          npm run eslint
+          npm run build
+          npm test

.husky/pre-commit

@@ -2,4 +2,5 @@
 . "$(dirname "$0")/_/husky.sh"
 
 npm test
-npm run pretty
+npm run pretty
+npm run eslint