feat(client): introduce core-js

.eslintrc

@@ -2,7 +2,11 @@
   "extends": ["webpack", "prettier"],
   "globals": {
     "document": true,
-    "window": true
+    "window": true,
+    "self": true,
+    "WorkerGlobalScope": true,
+    "__resourceQuery": true,
+    "__webpack_dev_server_client__": true
   },
   "parserOptions": {
     "sourceType": "script"

azure-pipelines.yml

@@ -47,9 +47,6 @@ jobs:
         node-8:
           node_version: ^8.9.0
           webpack_version: latest
-        node-6:
-          node_version: ^6.9.0
-          webpack_version: latest
     steps:
       - task: NodeTool@0
         inputs:
@@ -98,9 +95,6 @@ jobs:
         node-8:
           node_version: ^8.9.0
           webpack_version: latest
-        node-6:
-          node_version: ^6.9.0
-          webpack_version: latest
     steps:
       - task: NodeTool@0
         inputs:
@@ -149,9 +143,6 @@ jobs:
         node-8:
           node_version: ^8.9.0
           webpack_version: latest
-        node-6:
-          node_version: ^6.9.0
-          webpack_version: latest
     steps:
       - script: 'git config --global core.autocrlf input'
         displayName: 'Config git core.autocrlf'

client-src/.eslintrc

@@ -0,0 +1,5 @@
+{
+  "parserOptions": {
+    "sourceType": "module"
+  }
+}

client-src/clients/BaseClient.js

@@ -1,5 +1,3 @@
-'use strict';
-
 /* eslint-disable
   no-unused-vars
 */

client-src/clients/SockJSClient.js

@@ -1,5 +1,3 @@
-'use strict';
-
 /* eslint-disable
   no-unused-vars
 */

client-src/clients/WebsocketClient.js

@@ -1,5 +1,3 @@
-'use strict';
-
 const BaseClient = require('./BaseClient');
 
 module.exports = class WebsocketClient extends BaseClient {};

client-src/default/index.js

@@ -1,14 +1,15 @@
-'use strict';
-
-/* global __resourceQuery WorkerGlobalScope self */
 /* eslint prefer-destructuring: off */
-const stripAnsi = require('strip-ansi');
-const socket = require('./socket');
-const overlay = require('./overlay');
-const { log, setLogLevel } = require('./utils/log');
-const sendMessage = require('./utils/sendMessage');
-const reloadApp = require('./utils/reloadApp');
-const createSocketUrl = require('./utils/createSocketUrl');
+import stripAnsi from 'strip-ansi';
+import socket from './socket';
+import {
+  clear as clearOverlay,
+  showMessage as showMessageOverlay,
+} from './overlay';
+import { log, setLogLevel } from './utils/log';
+import sendMessage from './utils/sendMessage';
+import reloadApp from './utils/reloadApp';
+import createSocketUrl from './utils/createSocketUrl';
+import { array, string } from './polyfill';
 
 const status = {
   isUnloading: false,
@@ -31,7 +32,7 @@ self.addEventListener('beforeunload', () => {
 
 if (typeof window !== 'undefined') {
   const qs = window.location.search.toLowerCase();
-  options.hotReload = qs.indexOf('hotreload=false') === -1;
+  options.hotReload = !string.includes(qs, 'hotreload=false');
 }
 
 const onSocketMessage = {
@@ -47,7 +48,7 @@ const onSocketMessage = {
     log.info('[WDS] App updated. Recompiling...');
     // fixes #1042. overlay doesn't clear if errors are fixed but warnings remain.
     if (options.useWarningOverlay || options.useErrorOverlay) {
-      overlay.clear();
+      clearOverlay();
     }
     sendMessage('Invalid');
   },
@@ -57,13 +58,13 @@ const onSocketMessage = {
   'still-ok': function stillOk() {
     log.info('[WDS] Nothing changed.');
     if (options.useWarningOverlay || options.useErrorOverlay) {
-      overlay.clear();
+      clearOverlay();
     }
     sendMessage('StillOk');
   },
   'log-level': function logLevel(level) {
     const hotCtx = require.context('webpack/hot', false, /^\.\/log$/);
-    if (hotCtx.keys().indexOf('./log') !== -1) {
+    if (array.includes(hotCtx.keys(), './log')) {
       hotCtx('./log').setLogLevel(level);
     }
     setLogLevel(level);
@@ -93,7 +94,7 @@ const onSocketMessage = {
   ok() {
     sendMessage('Ok');
     if (options.useWarningOverlay || options.useErrorOverlay) {
-      overlay.clear();
+      clearOverlay();
     }
     if (options.initial) {
       return (options.initial = false);
@@ -112,7 +113,7 @@ const onSocketMessage = {
       log.warn(strippedWarnings[i]);
     }
     if (options.useWarningOverlay) {
-      overlay.showMessage(warnings);
+      showMessageOverlay(warnings);
     }
 
     if (options.initial) {
@@ -128,7 +129,7 @@ const onSocketMessage = {
       log.error(strippedErrors[i]);
     }
     if (options.useErrorOverlay) {
-      overlay.showMessage(errors);
+      showMessageOverlay(errors);
     }
     options.initial = false;
   },

client-src/default/overlay.js

@@ -1,12 +1,10 @@
-'use strict';
-
 // The error overlay is inspired (and mostly copied) from Create React App (https://github.com/facebookincubator/create-react-app)
 // They, in turn, got inspired by webpack-hot-middleware (https://github.com/glenjamin/webpack-hot-middleware).
 
-const ansiHTML = require('ansi-html');
-const { AllHtmlEntities } = require('html-entities');
+import ansiHTML from 'ansi-html';
+import { AllHtmlEntities as Entities } from 'html-entities';
 
-const entities = new AllHtmlEntities();
+const entities = new Entities();
 const colors = {
   reset: ['transparent', 'transparent'],
   black: '181818',
@@ -96,7 +94,7 @@ function ensureOverlayDivExists(onOverlayDivReady) {
 }
 
 // Successful compilation.
-function clear() {
+export function clear() {
   if (!overlayDiv) {
     // It is not there in the first place.
     return;
@@ -110,7 +108,7 @@ function clear() {
 }
 
 // Compilation with errors (e.g. syntax error or missing modules).
-function showMessage(messages) {
+export function showMessage(messages) {
   ensureOverlayDivExists((div) => {
     // Make it look similar to our terminal.
     div.innerHTML = `<span style="color: #${
@@ -120,8 +118,3 @@ function showMessage(messages) {
     )}`;
   });
 }
-
-module.exports = {
-  clear,
-  showMessage,
-};

client-src/default/polyfill.js

@@ -0,0 +1,10 @@
+import stringIncludes from 'core-js/features/string/includes';
+import arrayIncludes from 'core-js/features/array/includes';
+
+export const array = {
+  includes: arrayIncludes,
+};
+
+export const string = {
+  includes: stringIncludes,
+};

client-src/default/socket.js

@@ -1,6 +1,3 @@
-'use strict';
-
-/* global __webpack_dev_server_client__ */
 /* eslint-disable
   camelcase
 */
@@ -46,4 +43,4 @@ const socket = function initSocket(url, handlers) {
   });
 };
 
-module.exports = socket;
+export default socket;

client-src/default/utils/createSocketUrl.js

@@ -1,10 +1,6 @@
-'use strict';
-
-/* global self */
-
-const url = require('url');
-const querystring = require('querystring');
-const getCurrentScriptSource = require('./getCurrentScriptSource');
+import url from 'url';
+import querystring from 'querystring';
+import getCurrentScriptSource from './getCurrentScriptSource';
 
 function createSocketUrl(resourceQuery) {
   let urlParts;
@@ -80,4 +76,4 @@ function createSocketUrl(resourceQuery) {
   });
 }
 
-module.exports = createSocketUrl;
+export default createSocketUrl;

client-src/default/utils/getCurrentScriptSource.js

@@ -1,5 +1,3 @@
-'use strict';
-
 function getCurrentScriptSource() {
   // `document.currentScript` is the most accurate way to find the current script,
   // but is not supported in all browsers.
@@ -17,4 +15,4 @@ function getCurrentScriptSource() {
   throw new Error('[WDS] Failed to get current script source.');
 }
 
-module.exports = getCurrentScriptSource;
+export default getCurrentScriptSource;

client-src/default/utils/log.js

@@ -1,23 +1,18 @@
-'use strict';
+import { getLogger } from 'loglevel';
 
-const log = require('loglevel').getLogger('webpack-dev-server');
+export const log = getLogger('webpack-dev-server');
 
 const INFO = 'info';
 const WARN = 'warn';
 const ERROR = 'error';
 const DEBUG = 'debug';
 const TRACE = 'trace';
 const SILENT = 'silent';
-// deprecated
-// TODO: remove these at major released
-// https://github.com/webpack/webpack-dev-server/pull/1825
-const WARNING = 'warning';
-const NONE = 'none';
 
 // Set the default log level
 log.setDefaultLevel(INFO);
 
-function setLogLevel(level) {
+export function setLogLevel(level) {
   switch (level) {
     case INFO:
     case WARN:
@@ -26,22 +21,10 @@ function setLogLevel(level) {
     case TRACE:
       log.setLevel(level);
       break;
-    // deprecated
-    case WARNING:
-      // loglevel's warning name is different from webpack's
-      log.setLevel('warn');
-      break;
-    // deprecated
-    case NONE:
     case SILENT:
       log.disableAll();
       break;
     default:
       log.error(`[WDS] Unknown clientLogLevel '${level}'`);
   }
 }
-
-module.exports = {
-  log,
-  setLogLevel,
-};

client-src/default/utils/reloadApp.js

@@ -1,8 +1,4 @@
-'use strict';
-
-/* global WorkerGlobalScope self */
-
-const { log } = require('./log');
+import { log } from './log';
 
 function reloadApp(
   { hotReload, hot, liveReload },
@@ -46,4 +42,4 @@ function reloadApp(
   }
 }
 
-module.exports = reloadApp;
+export default reloadApp;

client-src/default/utils/sendMessage.js

@@ -1,9 +1,5 @@
-'use strict';
-
-/* global __resourceQuery WorkerGlobalScope self */
-
 // Send messages to the outside, so plugins can consume it.
-function sendMsg(type, data) {
+function sendMessage(type, data) {
   if (
     typeof self !== 'undefined' &&
     (typeof WorkerGlobalScope === 'undefined' ||
@@ -19,4 +15,4 @@ function sendMsg(type, data) {
   }
 }
 
-module.exports = sendMsg;
+export default sendMessage;

client-src/default/webpack.config.js

@@ -1,5 +1,3 @@
-'use strict';
-
 module.exports = {
   mode: 'production',
   module: {

client-src/live/index.js

@@ -1,11 +1,9 @@
-'use strict';
-
 /* eslint import/no-extraneous-dependencies: off, global-require: off */
 
-const $ = require('jquery');
-const stripAnsi = require('strip-ansi');
-const socket = require('../default/socket');
-require('./style.css');
+import $ from 'jquery';
+import stripAnsi from 'strip-ansi';
+import socket from '../default/socket';
+import './style.css';
 
 let hot = false;
 let currentHash = '';

client-src/live/webpack.config.js

@@ -1,5 +1,3 @@
-'use strict';
-
 const path = require('path');
 const CopyPlugin = require('copy-webpack-plugin');
 

client-src/sockjs/index.js

@@ -1,3 +1,3 @@
-'use strict';
+import client from 'sockjs-client';
 
-module.exports = require('sockjs-client');
+export default client;

client-src/sockjs/webpack.config.js

@@ -1,5 +1,3 @@
-'use strict';
-
 module.exports = {
   mode: 'production',
   output: {

globalSetupTest.js

@@ -7,8 +7,7 @@ const ports = require('./test/ports-map');
 async function validatePorts() {
   const samples = [];
 
-  Object.keys(ports).forEach((key) => {
-    const value = ports[key];
+  Object.entries(ports).forEach(([key, value]) => {
     const arr = Array.isArray(value) ? value : [value];
 
     arr.forEach((port) => {