Develop Reference

Why does my vue web app load a blank page in IE11 and look broken in Edge?

I'm having a bit of trouble with getting my project to work on IE11 and Edge
You can view it here: https://tagfireandsecurity.co.uk/
THE PROBLEMS
IE11: Blank page, shows multiple errors:
SCRIPT1002: Syntax error
firebase-app.js (1,1)
SCRIPT1002: Syntax error
firebase-analytics.js (1,1)
SCRIPT1002: Syntax error
init.js (1,1)
SCRIPT5043: Accessing the 'caller' property of a function or arguments object is not allowed in strict mode
eval code (3959) (15268,9)
SCRIPT5022: SecurityError
sockjs.js (1684,3)
Edge: Loads the website, however its all messed up. For example the grid is not working and my carousels aren't working. Also shows some errors:
SCRIPT65535: SCRIPT65535: Invalid calling object
WHAT I'VE DONE SO FAR
I tried to make sure babel will polyfill which I don't even know if it's doing it to be honest, I followed the documentation on their website and I don't think its working.
I also tried to add transpileDependencies: ['vue-mq', 'vue-carousel', 'firebase', 'vue-lazyload-video'] to polyfill my plugins but I don't think that is doing anything either.
I also added an autoprefixer and I believe that is working because the SCSS to CSS output now has all the prefixes in it, so why it's not working in EDGE? I don't know. Inspecting it in Edge shows it has the prefixes there, sometimes just disabling the prefix and putting it back on again fixes it so I'm very confused.
Here are my config files:
babel.config.js
module.exports = {
presets: [
['#vue/app', {
polyfills: [
'es.promise',
'es.symbol'
]
}]
]
};
webpack.config.js
module.exports = {
module: {
rules: [{
test: /\.css$/,
use: [
'style-loader',
{ loader: 'css-loader', options: { importLoaders: 1 } },
'postcss-loader'
]
}],
vue: {
// configure autoprefixer
autoprefixer: {
browsers: ['last 2 versions']
}
}
}
}
vue.config.js
// vue.config.js
module.exports = {
transpileDependencies: ['vue-mq', 'vue-carousel', 'firebase', 'vue-lazyload-video']
}
main.ts
import "core-js/stable";
import "regenerator-runtime/runtime";
require('intersection-observer');
import "regenerator-runtime/runtime";
import Vue from "vue";
import App from "./App.vue";
import router from "./router";
import store from "./store";
import "#fortawesome/fontawesome-free/css/all.css";
import VueMq from "vue-mq";
import { gsap } from "gsap";
import { ScrollTrigger } from "gsap/ScrollTrigger";
import VueCarousel from "vue-carousel";
import "animate.css/animate.css";
import * as firebase from "firebase";
import VueLazyLoadVideo from "vue-lazyload-video";
require("intersection-observer");
require("matchmedia-polyfill");
require("matchmedia-polyfill/matchMedia.addListener");
import "lazysizes";
import "lazysizes/plugins/parent-fit/ls.parent-fit";
import "lazysizes/plugins/blur-up/ls.blur-up";
// Register Components
// LazyVideo & LazyVideoAsGIF
Vue.use(VueLazyLoadVideo);
const firebaseConfig = {
HIDDEN CONFIG FOR STACKOVERFLOW
};
firebase.initializeApp(firebaseConfig);
Vue.use(VueCarousel);
gsap.registerPlugin(ScrollTrigger);
Vue.use(VueMq, {
breakpoints: {
// default breakpoints - customize this
sm: 480,
md: 921,
lg: 1024
}
});
Vue.config.productionTip = false;
new Vue({
router,
store,
render: h => h(App)
}).$mount("#app");
postcss.config.js
module.exports = {
plugins: [
require('autoprefixer')({})
]
};
package.json
{
"name": "tag",
"version": "0.1.0",
"private": true,
"scripts": {
"serve": "vue-cli-service serve",
"build": "vue-cli-service build",
"lint": "vue-cli-service lint"
},
"dependencies": {
"#firebase/polyfill": "^0.3.36",
"#fortawesome/fontawesome-free": "^5.13.0",
"animate.css": "^4.1.0",
"axios": "^0.19.2",
"core-js": "^3.6.5",
"firebase": "^7.15.5",
"gsap": "^3.4.0",
"intersection-observer": "^0.11.0",
"lazysizes": "^5.2.2",
"matchmedia-polyfill": "^0.3.2",
"uuid": "^8.2.0",
"vue": "^2.6.11",
"vue-carousel": "^0.18.0",
"vue-class-component": "^7.2.3",
"vue-lazyload-video": "^0.1.15",
"vue-mq": "^1.0.1",
"vue-property-decorator": "^8.4.2",
"vue-router": "^3.2.0",
"vuex": "^3.4.0"
},
"devDependencies": {
"#babel/preset-env": "^7.10.4",
"#typescript-eslint/eslint-plugin": "^2.33.0",
"#typescript-eslint/parser": "^2.33.0",
"#vue/cli-plugin-babel": "^4.4.6",
"#vue/cli-plugin-eslint": "~4.4.0",
"#vue/cli-plugin-router": "~4.4.0",
"#vue/cli-plugin-typescript": "~4.4.0",
"#vue/cli-plugin-vuex": "~4.4.0",
"#vue/cli-service": "~4.4.0",
"#vue/eslint-config-prettier": "^6.0.0",
"#vue/eslint-config-typescript": "^5.0.2",
"autoprefixer": "^9.8.5",
"cssnano": "^4.1.10",
"eslint": "^6.7.2",
"eslint-plugin-prettier": "^3.1.3",
"eslint-plugin-vue": "^6.2.2",
"fork-ts-checker-webpack-plugin": "^5.0.5",
"google-auth-library": "^6.0.5",
"node-sass": "^4.12.0",
"postcss-import": "^12.0.1",
"postcss-load-config": "^2.1.0",
"postcss-loader": "^3.0.0",
"postcss-preset-env": "^6.7.0",
"prettier": "^1.19.1",
"sass-loader": "^8.0.2",
"sugarss": "^2.0.0",
"typescript": "~3.9.3",
"vue-template-compiler": "^2.6.11"
},
"eslintConfig": {
"root": true,
"env": {
"node": true
},
"extends": [
"plugin:vue/essential",
"eslint:recommended",
"#vue/typescript/recommended",
"#vue/prettier",
"#vue/prettier/#typescript-eslint"
],
"parserOptions": {
"ecmaVersion": 2020
},
"rules": {}
},
"browserslist": [
"last 1 version",
"> 1%",
"IE 10"
]
}
tsconfig.json
{
"compilerOptions": {
"target": "esnext",
"module": "esnext",
"jsx": "preserve",
"allowJs": true,
"strict": false,
"importHelpers": true,
"moduleResolution": "node",
"experimentalDecorators": true,
"esModuleInterop": true,
"allowSyntheticDefaultImports": true,
"sourceMap": true,
"baseUrl": ".",
"types": [
"webpack-env"
],
"paths": {
"#/*": [
"src/*"
]
},
"lib": [
"esnext",
"dom",
"dom.iterable",
"scripthost"
]
},
"include": [
"src/**/*.ts",
"src/**/*.tsx",
"src/**/*.vue",
"tests/**/*.ts",
"tests/**/*.tsx"
],
"exclude": [
"node_modules"
]
}

Sorry to say this, you can't render a website built with JS based framework (VUE, ReactJS etc) in IE, and the JS engine of Edge (non-chromium) is not capable of handling all features of ES6 standard. If the customer wants to use your website on a Microsoft based browser, then they have to switch to the latest Edge based on Chromium.

ESLint has parsing error Unexpected token /

I have code like:
import 'app/css/normalize.css'
import 'app/css/app.css'
import React from 'react'
import ReactDOM from 'react-dom'
const App = () => {
return (
<div>
<h1>Finances</h1>
Test
</div>
)
}
ReactDOM.render(
<App />,
document.getElementById('app')
)
ESLint complains that the / in </h1> is invalid. Why is that?
My ESLint config
module.exports = {
"env": {
"browser": true,
"es6": true
},
"extends": ["eslint:recommended", "plugin:react/recommended"],
"parserOptions": {
"ecmaFeatures": {
"jsx": true
},
"ecmaVersion": 2018,
"sourceType": "module"
},
"plugins": [
"react"
],
"rules": {
"indent": [
"error",
4
],
"linebreak-style": [
"error",
"unix"
],
"quotes": [
"error",
"single"
],
"semi": [
"error",
"never"
]
}
};
ESLint output
> finances-web#1.0.0 lint /home/jiewmeng/Dropbox/finances2019/web
> eslint scripts/**/*.js
/home/jiewmeng/Dropbox/finances2019/web/scripts/app.js
10:20 error Parsing error: Unexpected token /
✖ 1 problem (1 error, 0 warnings)
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! finances-web#1.0.0 lint: `eslint scripts/**/*.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the finances-web#1.0.0 lint script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.
npm ERR! A complete log of this run can be found in:
npm ERR! /home/jiewmeng/.npm/_logs/2018-12-23T04_08_42_410Z-debug.log
Could it be something to do with my react version?
{
"name": "finances-web",
"version": "1.0.0",
"description": "",
"main": "index.html",
"scripts": {
"lint": "eslint scripts/**/*.js",
"build": "webpack --config webpack.config.js",
"dev": "webpack-dev-server --hot --color --history-api-fallback --config webpack.config.js"
},
"author": "Jiew Meng <jiewmeng#gmail.com>",
"license": "MIT",
"devDependencies": {
"#babel/core": "^7.2.2",
"#babel/preset-env": "^7.2.0",
"#babel/preset-react": "^7.0.0",
"babel-loader": "^8.0.4",
"copy-webpack-plugin": "^4.6.0",
"css-loader": "^2.0.1",
"eslint": "^5.10.0",
"eslint-plugin-react": "^7.11.1",
"html-webpack-plugin": "^3.2.0",
"mini-css-extract-plugin": "^0.5.0",
"postcss-loader": "^3.0.0",
"postcss-preset-env": "^6.5.0",
"react-hot-loader": "^4.6.1",
"style-loader": "^0.23.1",
"webpack": "^4.27.1",
"webpack-cli": "^3.1.2",
"webpack-dev-server": "^3.1.10"
},
"dependencies": {
"#babel/polyfill": "^7.0.0",
"lodash": "^4.17.11",
"react": "^16.6.3",
"react-dom": "^16.6.3"
}
}

Ok ... realized my mistake. In eslintrc I need to add
"parser": "babel-eslint",

Module build failed: Error: Couldn't find preset "transform-class-properties" relative to directory

I've tried putting an arrow function in my class which failed to compile.
I've read that I should install https://www.npmjs.com/package/babel-plugin-transform-class-properties
Now I'm getting the error:
Module build failed: Error: Couldn't find preset
"transform-class-properties" relative to directory
"/home/luke/Documents/myProject"
I've tried the solutions suggested in these posts (and others)
Webpack + Babel: Couldn't find preset "es2015" relative to directory
Error: Couldn't find preset "es2015" relative to directory
My current setup is as follows:
/app/components/App.js
import React from 'react'
import { Switch, Route, BrowserRouter as Router } from 'react-router-dom'
class App extends React.Component{
sayHello = name => `Hello ${name}!`
render(){
return(
<Router>
<div >
...
</div>
</Router>
)
}
}
export default App
/package.json
{
"name": "um-web",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"start": "webpack-dev-server --open",
"build": "NODE_ENV='production' webpack -p"
},
"babel": {
"presets": [
"env",
"react",
"es2015",
"transform-class-properties"
]
},
"author": "",
"license": "ISC",
"devDependencies": {
"babel-core": "^6.25.0",
"babel-loader": "^7.0.0",
"babel-plugin-transform-class-properties": "^6.24.1",
"babel-preset-env": "^1.6.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"css-loader": "^0.28.4",
"html-webpack-plugin": "^2.28.0",
"style-loader": "^0.18.2",
"webpack": "^2.6.1",
"webpack-dev-server": "^2.4.5"
},
"dependencies": {
"amazon-cognito-identity-js": "^1.19.0",
"axios": "^0.16.2",
"d3": "^4.9.1",
"lodash": "^4.17.4",
"moment": "^2.18.1",
"prop-types": "^15.5.10",
"query-string": "^4.3.4",
"react": "^15.6.1",
"react-dimensions": "^1.3.0",
"react-dom": "^15.6.1",
"react-measure": "^2.0.2",
"react-router-dom": "^4.1.1",
"recharts": "^1.0.0-alpha.1",
"semantic-ui-react": "^0.69.0"
}
}
/webpack.config.js
var path = require('path')
var HtmlWebpackPlugin = require('html-webpack-plugin')
var webpack = require('webpack')
var config = {
entry: './app/index.js',
output:{
path: path.resolve(__dirname, 'dist'),
filename: 'index_bundle.js',
publicPath: '/'
},
module:{
rules:[
{ test: /\.(js)$/, use: 'babel-loader'},
{ test: /\.css$/, use: ['style-loader', 'css-loader']}
]
},
devServer: {
historyApiFallback: true
},
plugins: [
new HtmlWebpackPlugin({
template: 'app/index.html'
})
]
}
if(process.env.NODE_ENV === 'production'){
config.plugins.push(
new webpack.DefinePlugin({
'process.env' : {
'NODE_ENV': JSON.stringify(process.env.NODE_ENV)
}
}),
new webpack.optimize.UglifyJsPlugin()
)
}
module.exports = config

transform-class-properties is a plugin not a preset, so you should put it in your babel plugin config.
Here is an example .babelrc
{
"presets": [
["env", {
"targets": {
"browsers": ["last 2 versions", "safari >= 7"],
"uglify": true
},
"modules": false
}],
"react"
],
"plugins": [
["transform-class-properties", { "spec": true }],
"transform-decorators",
"transform-object-rest-spread",
"react-hot-loader/babel"
]
}
And the explanation of this plugin:
https://babeljs.io/docs/plugins/transform-class-properties/
Hope this helps.

babel-plugin-transform-class-properties is a plugin not a preset. When you list it under presets, Babel will look for the module with the babel-preset- prefix in addition to the literal module name. See Plugin/Preset Paths for details.
You need to put it under plugins, as the Usage in the README shows.
"babel": {
"presets": [
"env",
"react"
],
"plugins": [
"transform-class-properties"
]
},
I also removed the es2015 preset, because it is deprecated in favour of env which contains everything that es2015 does and more.

[React-Native][Jest]SyntaxError: Unexpected token import

It seems babel transform works in my testcase code, but es6 syntax in node_modules does not.
Error
environment
npm 4.5
MacOS Sierra
jest config
{
"preset": "react-native",
"globals": {
"__DEV__": true
},
"transform": {
"^.+\\.js$": "babel-jest"
}
}
babelrc
{
"env": {
"test": {
"presets": ["react-native"],
"plugins": [["import", { "libraryName": "antd-mobile" }]]
},
"development": {
"presets": ["react-native"],
"plugins": [["import", { "libraryName": "antd-mobile" }]]
},
"production": {
}
}
}
testcase
import 'react-native';
import React from 'react';
import renderer from 'react-test-renderer';
import Index from '../index.ios.js';
it('renders correctly', () => {
const tree = renderer.create(
<Index />
);
});
package.json
{
"private": true,
"scripts": {
"web": "roadhog server",
"build-web": "cross-env NODE_ENV=production roadhog build",
"start": "react-native start",
"ios": "cross-env NODE_ENV=development node themes/theme.rn.config.js && react-native run-ios",
"android": "cross-env NODE_ENV=development node theme/theme.rn.config.js && react-native run-android",
"lint": "eslint --ext .js src test",
"precommit": "npm run lint",
"test": "cross-env NODE_ENV=test jest --config .jest.config.json --no-cache"
},
"engines": {
"install-node": "6.9.2"
},
"theme": "./themes/theme.web.config.js",
"dependencies": {
"antd-mobile": "^1.0.8",
"babel-runtime": "^6.9.2",
"dva": "^1.2.1",
"lodash": "^4.17.4",
"moment": "^2.18.1",
"rc-form": "^1.3.0",
"react": "15.4.2",
"react-dom": "15.4.2",
"react-native": "0.42.3",
"react-native-chart": "^1.0.8-beta",
"react-native-gesture-password": "^0.2.0",
"react-native-scrollable-tab-view": "^0.7.4",
"react-native-smart-gesture-password": "^2.1.0",
"react-navigation": "^1.0.0-beta.7",
"recharts": "^0.21.2",
"socket.io-client": "^1.7.3"
},
"devDependencies": {
"babel-eslint": "^7.1.1",
"babel-jest": "^19.0.0",
"babel-plugin-dva-hmr": "^0.3.2",
"babel-plugin-import": "^1.1.1",
"babel-plugin-transform-runtime": "^6.9.0",
"babel-preset-react-native": "^1.9.1",
"cross-env": "^4.0.0",
"eslint": "^3.12.2",
"eslint-config-airbnb": "^13.0.0",
"eslint-plugin-import": "^2.2.0",
"eslint-plugin-jsx-a11y": "^2.2.3",
"eslint-plugin-react": "^6.8.0",
"expect": "^1.20.2",
"husky": "^0.13.3",
"jest": "^19.0.2",
"less-vars-to-js": "^1.1.2",
"postcss-pxtorem": "^4.0.0",
"react-test-renderer": "15.4.2",
"redbox-react": "^1.3.2",
"roadhog": "^0.6.0-beta1"
}
}
debug message
jest version = 19.0.2
test framework = jasmine2
config = {
"automock": false,
"bail": false,
"browser": false,
"cacheDirectory": "/var/folders/h3/bfmnzb_j3zg3pdffgps1w3vh0000gn/T/jest",
"clearMocks": false,
"coveragePathIgnorePatterns": [
"/node_modules/"
],
"coverageReporters": [
"json",
"text",
"lcov",
"clover"
],
"expand": false,
"globals": {
"__DEV__": true
},
"haste": {
"defaultPlatform": "ios",
"platforms": [
"android",
"ios",
"native"
],
"providesModuleNodeModules": [
"react-native"
]
},
"moduleDirectories": [
"node_modules"
],
"moduleFileExtensions": [
"js",
"json",
"jsx",
"node"
],
"moduleNameMapper": [
[
"^[./a-zA-Z0-9$_-]+\\.(bmp|gif|jpg|jpeg|png|psd|svg|webp)$",
"RelativeImageStub"
],
[
"^React$",
"/Users/erickim/Documents/Develop/react/glfm/node_modules/react"
]
],
"modulePathIgnorePatterns": [
"/Users/erickim/Documents/Develop/react/glfm/node_modules/react-native/Libraries/react-native/",
"/Users/erickim/Documents/Develop/react/glfm/node_modules/react-native/packager/"
],
"noStackTrace": false,
"notify": false,
"preset": "react-native",
"resetMocks": false,
"resetModules": false,
"roots": [
"/Users/erickim/Documents/Develop/react/glfm"
],
"snapshotSerializers": [],
"testEnvironment": "/Users/erickim/Documents/Develop/react/glfm/node_modules/jest-environment-node/build/index.js",
"testMatch": [
"**/__tests__/**/*.js?(x)",
"**/?(*.)(spec|test).js?(x)"
],
"testPathIgnorePatterns": [
"/node_modules/"
],
"testRegex": "",
"testResultsProcessor": null,
"testURL": "about:blank",
"timers": "real",
"transformIgnorePatterns": [
"node_modules/(?!(jest-)?react-native|react-clone-referenced-element)"
],
"useStderr": false,
"verbose": null,
"watch": false,
"setupFiles": [
"/Users/erickim/Documents/Develop/react/glfm/node_modules/babel-polyfill/lib/index.js",
"/Users/erickim/Documents/Develop/react/glfm/node_modules/react-native/jest/setup.js"
],
"transform": [
[
"^.+\\.js$",
"/Users/erickim/Documents/Develop/react/glfm/node_modules/babel-jest/build/index.js"
]
],
"rootDir": "/Users/erickim/Documents/Develop/react/glfm",
"name": "005c8bf9b4d78dfa0bb0e32c0c55b0fb",
"testRunner": "/Users/erickim/Documents/Develop/react/glfm/node_modules/jest-jasmine2/build/index.js",
"cache": false,
"watchman": true
}

I figured it out. By default jest doesn't transform ES6 js code from node_modules. In my case, the package react-navigation module need to be translated. So I added transformIgnorePatterns to my jest configuration and everything worked:
{
"preset": "react-native",
"setupFiles": ["./test/setup.js"],
"globals": {
"__DEV__": true
},
"transform": {
"^.+\\.js$": "babel-jest"
},
"transformIgnorePatterns": [
"node_modules/(?!react-native|react-navigation)/"
]
}
https://facebook.github.io/jest/docs/tutorial-react-native.html#transformignorepatterns-customization

The problem is that node doesn't understand ES6 modules and JEST is node process, so using import inside your test throw this error. Instead of babel we specifically tell Webpack to transcompile ES6 modules.So, we can fix this error by telling babel that when we are in testing scenario please combile ES6 modules by using below babel configuration settings
"env": {
"test": {
"plugins": ["transform-es2015-modules-commonjs"]
}
}
you can download this babel plugin by npm
npm install --save-dev babel-plugin-transform-es2015-modules-commonjs
Hopefully this will fix your problem.

ESLint imports/modules are treated as undefined

I'm using Webpack with Polymer, importing a component like so:
import '#polymer/polymer/polymer-element.html';
class AppShell extends Polymer.Element {
static get is() { return 'app-shell'; }
}
I left out the rest of the component here. The import is working as expected in my app, but when I am running ESLint, I get the following error message:
50:27 error 'Polymer' is not defined no-undef
This is my package.json, where I'm defining my ESLint settings. Anyone have an idea why ESLint is not picking up the import properly?
{
"name": "client-meeting-tracker",
"version": "1.0.0",
"description": "",
"main": "index.js",
"private": true,
"scripts": {
"start": "node utils/webserver.js",
"lint": "eslint --ext .html,.js */**",
"build": "node utils/build.js"
},
"dependencies": {
"#startup-boilerplate/inkling": "*",
"auth0-lock": "^10.7.3",
"lodash": "^4.6.1",
"moment": "^2.17.1"
},
"devDependencies": {
"cross-env": "^1.0.6",
"css-loader": "^0.23.1",
"eslint": "^3.16.0",
"eslint-plugin-html": "^2.0.1",
"eslint-plugin-import": "^2.2.0",
"file-loader": "^0.8.4",
"fs-extra": "^0.30.0",
"polymer-cli": "^0.17.0",
"wc-loader": "*",
"webpack": "2.2.0",
"webpack-dev-server": "2.2.0"
},
"eslintConfig": {
"env": {
"browser": true,
"commonjs": true,
"es6": true
},
"extends": [
"eslint:recommended"
],
"parserOptions": {
"sourceType": "module"
},
"rules": {
"indent": [
"error",
"tab",
{
"SwitchCase": 1
}
],
"quotes": [
"error",
"single"
],
"semi": [
"error",
"always"
]
},
"plugins": [
"html"
]
}
}

Polymer is defined as a global, so I would configure Polymer as a global in your package.json:
"eslintConfig": {
"globals": {
"Polymer": true
}
}