Lint examples (#4985)

* Lint examples/with-apollo-and-redux-saga

* Lint examples/with-apollo-auth

* Lint examples/with-apollo

* Lint exampels/with-google-analytics

* Lint examples/with-higher-order-component

* Lint examples/with-react-i18next

* Lint exampels/with-redux

* Lint exampels/with-relay-modern

* Lint examples/with-universal-configuration-runtime

* Add **/examples/**/lib/** to linter

examples/with-apollo-and-redux-saga/lib/clock/actions.js

@@ -3,7 +3,7 @@ export const actionTypes = {
   TICK_CLOCK: 'TICK_CLOCK'
 }
 
-export function startClock(isServer=true) {
+export function startClock (isServer = true) {
   return {
     type: actionTypes.START_CLOCK,
     light: isServer,
@@ -11,7 +11,7 @@ export function startClock(isServer=true) {
   }
 }
 
-export function tickClock(isServer) {
+export function tickClock (isServer) {
   return {
     type: actionTypes.TICK_CLOCK,
     light: !isServer,

examples/with-apollo-and-redux-saga/lib/clock/reducers.js

@@ -5,7 +5,7 @@ export const initialState = {
   light: false
 }
 
-function reducer(state = initialState, action) {
+function reducer (state = initialState, action) {
   switch (action.type) {
     case actionTypes.TICK_CLOCK:
       return {

examples/with-apollo-and-redux-saga/lib/clock/sagas.js

@@ -7,7 +7,7 @@ import { actionTypes, tickClock } from './actions'
 
 es6promise.polyfill()
 
-function* runClockSaga() {
+function * runClockSaga () {
   yield take(actionTypes.START_CLOCK)
   while (true) {
     yield put(tickClock(false))

examples/with-apollo-and-redux-saga/lib/count/actions.js

@@ -3,10 +3,10 @@ export const actionTypes = {
   COUNT_DECREASE: 'COUNT_DECREASE'
 }
 
-export function countIncrease() {
+export function countIncrease () {
   return { type: actionTypes.COUNT_INCREASE }
 }
 
-export function countDecrease() {
+export function countDecrease () {
   return { type: actionTypes.COUNT_DECREASE }
 }

examples/with-apollo-and-redux-saga/lib/count/reducers.js

@@ -2,7 +2,7 @@ import { actionTypes } from './actions'
 
 const initialState = 0
 
-function reducer(state = initialState, action) {
+function reducer (state = initialState, action) {
   switch (action.type) {
     case actionTypes.COUNT_INCREASE:
       return state + 1

examples/with-apollo-and-redux-saga/lib/initApollo.js

@@ -10,7 +10,7 @@ if (!process.browser) {
   global.fetch = fetch
 }
 
-function create(initialState) {
+function create (initialState) {
   // Check out https://github.com/zeit/next.js/pull/4611 if you want to use the AWSAppSyncClient
   return new ApolloClient({
     connectToDevTools: process.browser,
@@ -23,7 +23,7 @@ function create(initialState) {
   })
 }
 
-export default function initApollo(initialState) {
+export default function initApollo (initialState) {
   // Make sure to create a new client for every server-side request so that data
   // isn't shared between connections (which would be bad)
   if (!process.browser) {

examples/with-apollo-and-redux-saga/lib/placeholder/actions.js

@@ -4,18 +4,18 @@ export const actionTypes = {
   LOAD_DATA_ERROR: 'LOAD_DATA_ERROR'
 }
 
-export function loadData() {
+export function loadData () {
   return { type: actionTypes.LOAD_DATA }
 }
 
-export function loadDataSuccess(data) {
+export function loadDataSuccess (data) {
   return {
     type: actionTypes.LOAD_DATA_SUCCESS,
     data
   }
 }
 
-export function loadDataError(error) {
+export function loadDataError (error) {
   return {
     type: actionTypes.LOAD_DATA_ERROR,
     error

examples/with-apollo-and-redux-saga/lib/placeholder/reducers.js

@@ -5,7 +5,7 @@ export const initialState = {
   error: false
 }
 
-function reducer(state = initialState, action) {
+function reducer (state = initialState, action) {
   switch (action.type) {
     case actionTypes.LOAD_DATA_SUCCESS:
       return {

examples/with-apollo-and-redux-saga/lib/placeholder/sagas.js

@@ -1,12 +1,12 @@
 import { put, takeLatest } from 'redux-saga/effects'
 import es6promise from 'es6-promise'
-import 'isomorphic-unfetch'
+import fetch from 'isomorphic-unfetch'
 
 import { actionTypes, loadDataSuccess, loadDataError } from './actions'
 
 es6promise.polyfill()
 
-function* loadDataSaga() {
+function * loadDataSaga () {
   try {
     const res = yield fetch('https://jsonplaceholder.typicode.com/users')
     const data = yield res.json()

examples/with-apollo-and-redux-saga/lib/rootSaga.js

@@ -3,7 +3,7 @@ import { all } from 'redux-saga/effects'
 import clock from './clock/sagas'
 import placeholder from './placeholder/sagas'
 
-function* rootSaga() {
+function * rootSaga () {
   yield all([clock, placeholder])
 }
 

examples/with-apollo-and-redux-saga/lib/withApollo.js

@@ -5,7 +5,7 @@ import Head from 'next/head'
 import initApollo from './initApollo'
 
 // Gets the display name of a JSX component for dev tools
-function getComponentDisplayName(Component) {
+function getComponentDisplayName (Component) {
   return Component.displayName || Component.name || 'Unknown'
 }
 
@@ -18,7 +18,7 @@ export default ComposedComponent => {
       serverState: PropTypes.object.isRequired
     }
 
-    static async getInitialProps(ctx) {
+    static async getInitialProps (ctx) {
       // Initial serverState with apollo (empty)
       let serverState = {
         apollo: {
@@ -76,12 +76,12 @@ export default ComposedComponent => {
       }
     }
 
-    constructor(props) {
+    constructor (props) {
       super(props)
       this.apollo = initApollo(props.serverState.apollo.data)
     }
 
-    render() {
+    render () {
       return (
         <ApolloProvider client={this.apollo}>
           <ComposedComponent {...this.props} />

examples/with-apollo-and-redux-saga/lib/withReduxSaga.js

@@ -10,7 +10,7 @@ import rootSaga from './rootSaga'
 
 const sagaMiddleware = createSagaMiddleware()
 
-export function configureStore(initialState = {}) {
+export function configureStore (initialState = {}) {
   const store = createStore(
     rootReducer,
     initialState,

examples/with-apollo-and-redux/lib/initApollo.js

@@ -10,7 +10,7 @@ if (!process.browser) {
   global.fetch = fetch
 }
 
-function create(initialState) {
+function create (initialState) {
   // Check out https://github.com/zeit/next.js/pull/4611 if you want to use the AWSAppSyncClient
   return new ApolloClient({
     connectToDevTools: process.browser,
@@ -23,7 +23,7 @@ function create(initialState) {
   })
 }
 
-export default function initApollo(initialState) {
+export default function initApollo (initialState) {
   // Make sure to create a new client for every server-side request so that data
   // isn't shared between connections (which would be bad)
   if (!process.browser) {

examples/with-apollo-and-redux/lib/withApollo.js

@@ -5,7 +5,7 @@ import Head from 'next/head'
 import initApollo from './initApollo'
 
 // Gets the display name of a JSX component for dev tools
-function getComponentDisplayName(Component) {
+function getComponentDisplayName (Component) {
   return Component.displayName || Component.name || 'Unknown'
 }
 
@@ -18,7 +18,7 @@ export default ComposedComponent => {
       serverState: PropTypes.object.isRequired
     }
 
-    static async getInitialProps(ctx) {
+    static async getInitialProps (ctx) {
       // Initial serverState with apollo (empty)
       let serverState = {
         apollo: {
@@ -74,12 +74,12 @@ export default ComposedComponent => {
       }
     }
 
-    constructor(props) {
+    constructor (props) {
       super(props)
       this.apollo = initApollo(this.props.serverState.apollo.data)
     }
 
-    render() {
+    render () {
       return (
         <ApolloProvider client={this.apollo}>
           <ComposedComponent {...this.props} />

examples/with-apollo-auth/lib/withApollo.js

@@ -6,7 +6,7 @@ import Head from 'next/head'
 
 import initApollo from './initApollo'
 
-function parseCookies(req, options = {}) {
+function parseCookies (req, options = {}) {
   return cookie.parse(
     req ? req.headers.cookie || '' : document.cookie,
     options
@@ -20,7 +20,7 @@ export default App => {
       apolloState: PropTypes.object.isRequired
     }
 
-    static async getInitialProps(ctx) {
+    static async getInitialProps (ctx) {
       const { Component, router, ctx: { req, res } } = ctx
       const apollo = initApollo({}, {
         getToken: () => parseCookies(req).token
@@ -73,7 +73,7 @@ export default App => {
       }
     }
 
-    constructor(props) {
+    constructor (props) {
       super(props)
       // `getDataFromTree` renders the component first, the client is passed off as a property.
       // After that rendering is done using Next's normal rendering pipeline
@@ -82,7 +82,7 @@ export default App => {
       })
     }
 
-    render() {
+    render () {
       return <App {...this.props} apolloClient={this.apolloClient} />
     }
   }

examples/with-apollo/lib/init-apollo.js

@@ -1,6 +1,4 @@
-import { ApolloClient } from 'apollo-boost'
-import { HttpLink } from 'apollo-boost'
-import { InMemoryCache } from 'apollo-boost'
+import { ApolloClient, InMemoryCache, HttpLink } from 'apollo-boost'
 import fetch from 'isomorphic-unfetch'
 
 let apolloClient = null
@@ -10,7 +8,7 @@ if (!process.browser) {
   global.fetch = fetch
 }
 
-function create(initialState) {
+function create (initialState) {
   // Check out https://github.com/zeit/next.js/pull/4611 if you want to use the AWSAppSyncClient
   return new ApolloClient({
     connectToDevTools: process.browser,
@@ -23,7 +21,7 @@ function create(initialState) {
   })
 }
 
-export default function initApollo(initialState) {
+export default function initApollo (initialState) {
   // Make sure to create a new client for every server-side request so that data
   // isn't shared between connections (which would be bad)
   if (!process.browser) {

examples/with-apollo/lib/with-apollo-client.js

@@ -1,3 +1,4 @@
+import React from 'react'
 import initApollo from './init-apollo'
 import Head from 'next/head'
 import { getDataFromTree } from 'react-apollo'

examples/with-google-analytics/lib/gtag.js

@@ -3,7 +3,7 @@ export const GA_TRACKING_ID = '<YOUR_GA_TRACKING_ID>'
 // https://developers.google.com/analytics/devguides/collection/gtagjs/pages
 export const pageview = url => {
   window.gtag('config', GA_TRACKING_ID, {
-    page_location: url,
+    page_location: url
   })
 }
 
@@ -12,6 +12,6 @@ export const event = ({ action, category, label, value }) => {
   window.gtag('event', action, {
     event_category: category,
     event_label: label,
-    value: value,
+    value: value
   })
 }

examples/with-higher-order-component/lib/getDisplayName.js

@@ -1,3 +1,3 @@
-export function getDisplayName(Component) {
+export function getDisplayName (Component) {
   return Component.displayName || Component.name || 'Unknown'
 }

examples/with-react-i18next/lib/withI18next.js

@@ -15,8 +15,8 @@ export const withI18next = (namespaces = ['common']) => ComposedComponent => {
       ? getInitialProps(ctx.req, namespaces)
       : await loadNamespaces({
         components: [{ props: { namespaces } }],
-          i18n: I18n,
-        });
+        i18n: I18n
+      })
 
     return {
       ...composedInitialProps,

examples/with-redux/lib/with-redux-store.js

@@ -4,7 +4,7 @@ import {initializeStore} from '../store'
 const isServer = typeof window === 'undefined'
 const __NEXT_REDUX_STORE__ = '__NEXT_REDUX_STORE__'
 
-function getOrCreateStore(initialState) {
+function getOrCreateStore (initialState) {
   // Always make a new store if server, otherwise state is shared between requests
   if (isServer) {
     return initializeStore(initialState)
@@ -29,7 +29,7 @@ export default (App) => {
 
       let appProps = {}
       if (typeof App.getInitialProps === 'function') {
-        appProps = await App.getInitialProps.call(App, appContext)
+        appProps = await App.getInitialProps(appContext)
       }
 
       return {
@@ -38,12 +38,12 @@ export default (App) => {
       }
     }
 
-    constructor(props) {
+    constructor (props) {
       super(props)
       this.reduxStore = getOrCreateStore(props.initialReduxState)
     }
 
-    render() {
+    render () {
       return <App {...this.props} reduxStore={this.reduxStore} />
     }
   }

examples/with-relay-modern/lib/createRelayEnvironment.js

@@ -9,7 +9,7 @@ function fetchQuery (
   operation,
   variables,
   cacheConfig,
-  uploadables,
+  uploadables
 ) {
   return fetch(process.env.RELAY_ENDPOINT, {
     method: 'POST',

examples/with-universal-configuration-runtime/lib/env.js

@@ -1 +1 @@
-export default ('undefined' !== typeof window ? window.__ENV__ : process.env)
+export default (typeof window !== 'undefined' ? window.__ENV__ : process.env)

package.json

@@ -46,7 +46,6 @@
     "parser": "babel-eslint",
     "ignore": [
       "**/node_modules/**",
-      "**/examples/**/lib/**",
       "**/examples/with-ioc/**",
       "**/examples/with-kea/**",
       "**/examples/with-mobx/**",