Linting

.eslintrc

@@ -0,0 +1,3 @@
+{
+    "extends": "@guardian/eslint-config-typescript"
+}

.github/workflows/lint.yml

@@ -0,0 +1,20 @@
+name: lint 🔎
+on: [push]
+
+jobs:
+    run:
+        runs-on: ubuntu-latest
+        steps:
+            - uses: actions/checkout@v2
+            - uses: actions/setup-node@v1
+              with:
+                  node-version: '12.x'
+
+            # Cache npm dependencies using https://github.com/bahmutov/npm-install
+            - uses: bahmutov/npm-install@v1
+
+            - name: Install
+              run: npm install
+
+            - name: Lint
+              run: npm run lint

package.json

@@ -17,6 +17,7 @@
     "@babel/preset-env": "^7.12.1",
     "@babel/preset-react": "^7.12.5",
     "@emotion/babel-preset-css-prop": "^10.2.0",
+    "@guardian/eslint-config-typescript": "^0.4.1",
     "@storybook/react": "^6.1.0",
     "@types/jest": "^26.0.15",
     "@types/node": "^14.14.7",
@@ -35,6 +36,7 @@
     "build:tsc": "tsc --outDir tmp",
     "build:babel": "babel tmp --config-file ./config/babel.config.json --out-dir dist --copy-files",
     "build:cleanup": "rm -rf tmp",
+    "lint": "eslint . --ext .ts,.tsx",
     "test": "jest",
     "test:watch": "jest --watch",
     "storybook": "start-storybook -p 8181 --ci",