Added eslint

cc @domyen there are quite a few errors ;) Let's fix them over time

.eslintrc.js

@@ -0,0 +1,33 @@
+module.exports = {
+ parser: 'babel-eslint',
+ extends: ['airbnb', 'prettier', 'plugin:jest/recommended'],
+ plugins: ['prettier', 'jest'],
+ env: {
+ 'jest/globals': true,
+ },
+ rules: {
+ 'prettier/prettier': [
+ 'warn',
+ {
+ printWidth: 100,
+ tabWidth: 2,
+ bracketSpacing: true,
+ trailingComma: 'es5',
+ singleQuote: true,
+ jsxBracketSameLine: false,
+ },
+ ],
+ 'react/jsx-filename-extension': [
+ 1,
+ {
+ extensions: ['.js', '.jsx'],
+ },
+ ],
+ 'react/jsx-wrap-multilines': [
+ 'error',
+ {
+ arrow: false,
+ },
+ ],
+ },
+};

package.json

@@ -25,9 +25,21 @@
  "develop": "gatsby develop",
  "dev": "yarn develop",
  "format": "prettier --write 'src/**/*.js'",
+ "lint": "eslint .",
  "test": "echo \"Error: no test specified\" && exit 1"
  },
  "devDependencies": {
- "prettier": "^1.11.1"
+ "babel-eslint": "^8.2.2",
+ "eslint": "^4.19.1",
+ "eslint-config-airbnb": "^16.1.0",
+ "eslint-config-prettier": "^2.9.0",
+ "eslint-plugin-import": "^2.10.0",
+ "eslint-plugin-jest": "^21.15.0",
+ "eslint-plugin-jsx-a11y": "^6.0.3",
+ "eslint-plugin-prettier": "^2.6.0",
+ "eslint-plugin-react": "^7.7.0",
+ "prettier": "^1.11.1",
+ "prettier-eslint": "^8.8.1",
+ "prettier-eslint-cli": "^4.7.1"
  }
 }