Add eslint (#219)

Author: Nir Maoz

.eslintrc.js

@@ -0,0 +1,28 @@
+module.exports = {
+  parser: 'babel-eslint',
+  extends: ['standard', 'standard-react'],
+  env: {
+    node: true,
+    jest: true
+  },
+  parserOptions: {
+    ecmaVersion: 2020,
+    ecmaFeatures: {
+      legacyDecorators: true,
+      jsx: true
+    }
+  },
+  settings: {
+    react: { version: '16' }
+  },
+  rules: {
+    'space-before-function-paren': 0,
+    'react/prop-types': 0,
+    'react/jsx-handler-names': 0,
+    'react/jsx-fragments': 0,
+    'react/no-unused-prop-types': 0,
+    'import/export': 0,
+    'no-unused-vars': 'off',
+    semi: [1, 'always']
+  }
+};

package.json

@@ -15,6 +15,7 @@
     "test:build": "TEST_ENV=PRODUCTION npm run test:unit",
     "test:e2e": "cd ./e2e-test && npm run test",
     "test:coverage": "jest --coverage",
+    "test:lint": "eslint src --ext js,jsx",
     "pretest:e2e": "npm pack && cpy cloudinary-react-*.tgz e2e-test --rename=cloudinary-react.tgz",
     "build": "microbundle --no-compress --sourcemap false --jsx React.createElement --format esm,umd,cjs && npm run bundlewatch",
     "start": "microbundle watch --no-compress --sourcemap false --jsx React.createElement --format esm,umd,cjs",
@@ -35,6 +36,7 @@
   "devDependencies": {
     "@babel/cli": "^7.2.0",
     "@babel/core": "^7.2.2",
+    "@babel/eslint-parser": "^7.13.4",
     "@babel/plugin-proposal-class-properties": "^7.8.3",
     "@babel/plugin-proposal-export-default-from": "^7.2.0",
     "@babel/preset-env": "^7.2.0",
@@ -54,6 +56,14 @@
     "del-cli": "^3.0.0",
     "enzyme": "^3.10.0",
     "enzyme-adapter-react-16": "^1.14.0",
+    "eslint": "^7.20.0",
+    "eslint-config-standard": "^14.1.0",
+    "eslint-config-standard-react": "^9.2.0",
+    "eslint-plugin-import": "^2.18.2",
+    "eslint-plugin-jsx-a11y": "^6.4.1",
+    "eslint-plugin-node": "^11.0.0",
+    "eslint-plugin-react": "^7.17.0",
+    "eslint-plugin-standard": "^4.0.1",
     "jest": "^26.6.3",
     "jest-environment-enzyme": "^7.1.2",
     "jest-enzyme": "^7.1.2",