Add eslint and add lint check action (#4)

.eslintrc.json

@@ -0,0 +1,7 @@
+{
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended"],
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "root": true,
+  "ignorePatterns": ["dist/"]
+}

.github/workflows/main.yml

@@ -3,8 +3,8 @@ on:
   - pull_request
   - push
 jobs:
-  main:
-    name: ${{matrix.node}}
+  tests:
+    name: Tests on ${{matrix.node}}
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -17,4 +17,16 @@ jobs:
       matrix:
         node:
           - lts/gallium
+          - lts/hydrogen
+          - lts/iron
           - node
+  lint:
+    name: Lint and format check
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-node@v3
+        with:
+          node-version: "lts/iron"
+      - run: npm install
+      - run: npm run lint

package.json

@@ -10,8 +10,13 @@
   ],
   "scripts": {
     "build": "tsc",
-    "format": "prettier --write .",
-    "test": "npm run build && node --test"
+    "check": "npm run lint && npm run format",
+    "fix": "npm run lint:fix && npm run format:fix",
+    "format": "prettier --check .",
+    "format:fix": "prettier --write .",
+    "test": "npm run build && node --test",
+    "lint": "eslint .",
+    "lint:fix": "eslint --fix ."
   },
   "exports": "./dist/components.js",
   "files": [
@@ -21,6 +26,8 @@
   "types": "./dist/components.d.ts",
   "devDependencies": {
     "@types/hast": "^3.0.4",
+    "@typescript-eslint/eslint-plugin": "^6.20.0",
+    "@typescript-eslint/parser": "^6.20.0",
     "hastscript": "^9.0.0",
     "prettier": "^3.2.5",
     "rehype-format": "^5.0.0",