Develop Reference

Storybook Addon-Docs don´t show Code Snipped

Im using Storybook to Visualize and Document our React Component Library. Everything working fine exept that do not Show the Code in the Doc Page.
Project Data:
Typescript, React, Storybook
Project Dependencies:
"dependencies": {
"#types/node": "12.11.1",
"#types/react": "16.9.9",
"#types/react-dom": "16.9.2",
"#types/styled-components": "4.1.19",
"react": "16.10.2",
"react-dom": "16.10.2",
"react-scripts": "3.2.0",
"styled-components": "4.4.0",
"typescript": "3.6.4"
},
"devDependencies": {
"#babel/core": "7.6.0",
"#storybook/addon-actions": "5.2.6",
"#storybook/addon-console": "1.2.1",
"#storybook/addon-docs": "5.2.6",
"#storybook/addon-knobs": "5.2.6",
"#storybook/addon-links": "5.2.6",
"#storybook/addons": "5.2.6",
"#storybook/react": "5.2.6",
"#storybook/theming": "5.2.6",
"#svgr/cli": "4.3.3",
"#types/enzyme": "3.10.3",
"#types/enzyme-adapter-react-16": "1.0.5",
"#types/jest": "24.0.20",
"#types/react-test-renderer": "16.9.1",
"#types/storybook__react": "4.0.2",
"#typescript-eslint/eslint-plugin": "2.3.0",
"#typescript-eslint/parser": "2.5.0",
"babel-loader": "8.0.6",
"create-ts-index": "1.12.0",
"enzyme": "3.10.0",
"enzyme-adapter-react-16": "1.15.1",
"enzyme-to-json": "3.4.2",
"eslint-config-airbnb-typescript": "6.0.0",
"eslint-config-prettier": "6.5.0",
"eslint-config-react": "1.1.7",
"eslint-plugin-import": "2.18.2",
"eslint-plugin-jest": "23.0.2",
"eslint-plugin-jsx-a11y": "6.2.3",
"eslint-plugin-prettier": "3.1.1",
"eslint-plugin-react": "7.14.3",
"eslint-plugin-react-hooks": "1.7.0",
"jest": "24.9.0",
"jest-junit": "8.0.0",
"jest-styled-components": "6.3.3",
"prettier": "1.18.2",
"react-docgen-typescript-loader": "3.3.0",
"react-test-renderer": "16.10.2",
"recursive-copy": "2.0.10",
"themeprovider-storybook": "1.2.4",
"ts-jest": "24.1.0",
"ts-loader": "6.2.1"
The Problem is that in the Docs Section of Storybook everything working exept the Code Snippet -> "No code available"
Sceenshot of the Docs Page
My Files in .storybook:
I use the Docs React Preset -> presets.js:
module.exports = [
{
name: '#storybook/addon-docs/react/preset',
options: {
configureJSX: true,
babelOptions: {},
sourceLoaderOptions: null,
},
},
];
And this webpack.config.js
const path = require('path');
module.exports = ({ config }) => {
config.module.rules.push({
test: /\.(ts|tsx)$/,
exclude: path.resolve(__dirname, '..', 'node_modules'),
use: [
{
loader: require.resolve('babel-loader'),
options: {
presets: [require.resolve('babel-preset-react-app')],
},
},
require.resolve('react-docgen-typescript-loader'),
],
});
return config;
};
Her are the config.tsx
import React, { ReactElement } from 'react';
import { configure, addDecorator, addParameters } from '#storybook/react';
import { withThemesProvider } from 'themeprovider-storybook';
import yourTheme from './yourTheme';
import { brightTheme, GlobalStyle } from '../src';
import './yourStyle.css';
// eslint-disable-next-line #typescript-eslint/no-var-requires
const { setConsoleOptions } = require('#storybook/addon-console');
const themes = [brightTheme];
const withGlobalStyles = (storyFn): ReactElement => {
return (
<>
<GlobalStyle />
{storyFn()}
</>
);
};
addParameters({ options: { theme: yourTheme } });
addDecorator(withThemesProvider(themes));
addDecorator(withGlobalStyles);
setConsoleOptions({ panelExclude: [] });
configure(require.context('../src', true, /.stories.(tsx|mdx)$/), module);
In the addons.ts i have only the other addons registered. Because of the presets i think its not neccessary to register the addon-doc too.
Can anyone help me with that? Thanks a lot.

I found it through help from the Storybook Github Page.
In preset.js the line sourceLoaderOptions: null, kills the loading of the Story-Code-Snipped. -> Simple delete the line and it works.

getDerivedStateFromProps not called in React Native

I'm trying to use the new getDerivedStateFromProps lifecycle method in my React Native component but the method never gets called. I've tried looking it up but found no issues in the react-native repo. No results on StackOverflow or Google either.
What I did find are a reddit thread and a StackOverflow issue which both cite updating react-dom as a solution, which would not work in this case since there's no dom in React Native.
Can anyone confirm if this method is supposed to work in React Native? If it can be used, any help with solving this issue will be much appreciated.
Below is a simplified version of my component:
import React from 'react';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { Auth } from '../redux';
import ChillaAPI from '../api';
const withUserData = WrappedComponent => {
class UserDataLoader extends React.Component {
static getDerivedStateFromProps(props, state) {
console.log('getDerivedStateFromProps');
if (props.uid !== state.uid) {
return {
uid: props.uid,
};
}
return state;
}
state = { uid: null };
render() {
console.log({ propsUid: this.props.uid });
console.log({ stateUid: this.state.uid });
return <WrappedComponent />;
}
}
UserDataLoader.propTypes = {
uid: PropTypes.bool.isRequired,
};
return connect(mapStateToProps)(UserDataLoader);
};
function mapStateToProps(state) {
return {
uid: Auth.selectors.getUid(state),
};
}
export default withUserData;
The log output from the component is as follows:
{ propsUid: null }
{ stateUid: null }
{ propsUid: 'jW78ej3JDgPpheadAlcrkG8UIZB2' }
{ stateUid: null }
Here is my package.json for good measure:
{
"name": "Chilla",
"version": "0.0.1",
"private": true,
"scripts": {
"start": "node node_modules/react-native/local-cli/cli.js start",
"start:reset": "node node_modules/react-native/local-cli/cli.js start --reset-cache",
"watch:lint": "node node_modules/eslint-watch/bin/esw -w",
"test": "jest",
"precommit": "lint-staged"
},
"lint-staged": {
"*.js": [
"node_modules/.bin/prettier --single-quote --trailing-comma es5 --write",
"eslint",
"git add"
]
},
"dependencies": {
"axios": "^0.18.0",
"firebase": "^4.13.1",
"husky": "^0.14.3",
"lint-staged": "^7.0.4",
"prop-types": "^15.6.1",
"react": "16.3.1",
"react-native": "^0.52.2",
"react-native-fetch-blob": "^0.10.8",
"react-native-image-picker": "^0.26.7",
"react-navigation": "^1.5.11",
"react-redux": "^5.0.7",
"recompose": "^0.27.0",
"redux": "^4.0.0",
"redux-logger": "^3.0.6"
},
"devDependencies": {
"babel-eslint": "^8.2.3",
"babel-jest": "22.4.3",
"babel-preset-react-native": "4.0.0",
"eslint": "^4.19.1",
"eslint-config-airbnb": "^16.1.0",
"eslint-config-prettier": "^2.9.0",
"eslint-plugin-import": "^2.11.0",
"eslint-plugin-jsx-a11y": "^6.0.3",
"eslint-plugin-react": "^7.7.0",
"eslint-plugin-react-native": "^3.2.1",
"eslint-watch": "^3.1.4",
"jest": "22.4.3",
"prettier": "^1.12.1",
"react-test-renderer": "16.3.1"
},
"jest": {
"preset": "react-native"
}
}

Updating to react-native#0.55.3 solved this issue

Jest - Unexpected token import

I'm trying to learn how to do unit testing with React and jest. I've run into the following error:
Unexpected token import
Here are my babel presets:
{
"presets": ["es2015", "stage-0", "react"],
"env": {
"test": {
"plugins": ["transform-es2015-modules-commonjs"]
}
}
}
Here is the file i'm trying to test:
import jest from 'jest';
import React from 'react';
import { shallow } from 'enzyme';
import Step from '../src/components/step.js';
const wrapper = shallow(<Step />);
wrapper.find('a').simulate('click', { preventDefault() {} });
and here is my package.json:
{
"name": "react-simple-boilerplate",
"version": "1.0.0",
"description": "Simple and lightweight Boilerplate for ReactJS projects",
"scripts": {
"lint": "eslint src",
"start": "node server.js",
"test": "jest"
},
"devDependencies": {
"babel-core": "^6.24.1",
"babel-loader": "^7.0.0",
"babel-plugin-transform-es2015-modules-commonjs": "^6.26.0",
"babel-preset-es2015": "^6.24.1",
"babel-preset-react": "^6.24.1",
"babel-preset-stage-0": "^6.24.1",
"css-loader": "^0.28.0",
"enzyme": "^3.2.0",
"enzyme-adapter-react-16": "^1.1.0",
"eslint": "^3.19.0",
"eslint-plugin-react": "^6.10.3",
"jest": "^21.2.1",
"node-sass": "^4.5.2",
"react-addons-test-utils": "^15.6.2",
"sass-loader": "^6.0.3",
"style-loader": "^0.16.1",
"webpack": "^2.4.1",
"webpack-dev-server": "^2.4.4"
},
"dependencies": {
"babel-loader": "^7.0.0",
"react": "^15.5.4",
"react-dom": "^15.5.4"
},
"main": "server.js"
}
Have no idea why its giving me this message?

It looks like babel-jest is missing among your dependencies. That's why jest is not running babel on your ES6+ code before executing tests.

I'm pretty sure you need to add your babel presets to test as well, jest sets the env variable to test.
So...
"test": {
"plugins": ["transform-es2015-modules-commonjs"],
"presets": ["es2015", "react", "stage-0"]
}

React Native Exportiing

I am getting the following error when I am trying to build my React Native bundle.
Syntax Error components/Example/index.js: Unexpected token, expected ; (1:20)
I am not sure if it's a problem with my eslint/babel configs. Here are the files.
components/Example/index.js
export default from './View'
components/Example/View.js
import React, { Component, PropTypes, Button } from 'react';
import { connect } from 'react-redux'
import { updateExampleData } from '../../actions/example'
class Example extends Component {
static propTypes = {
title: PropTypes.string.isRequired,
navigator: PropTypes.object.isRequired,
exampleProp: PropTypes.object.isRequired
}
const incrementData = () => {
const newIncrement = this.props.exampleProp + 1
updateExampleData(newIncrement)
}
render() {
return (
<View>
<Text>exampleData: {this.props.exampleProp} </Text>
<Button
onPress={incrementData}
title="Increment Data"
color="#841584"
/>
</View>
)
}
}
const mapStateToProps = (state, props) => {
const exampleProp = state.example.example
const newProps = {
exampleProp: exampleProp
}
return newProps
}
export default connect(mapStateToProps)(Example)
package.json
{
"name": "SportsApp",
"version": "0.1.0",
"private": true,
"devDependencies": {
"babel-eslint": "^7.2.3",
"babel-preset-react-native": "^3.0.2",
"eslint": "^4.5.0",
"eslint-config-standard": "^10.2.1",
"eslint-plugin-import": "^2.7.0",
"eslint-plugin-node": "^5.1.1",
"eslint-plugin-promise": "^3.5.0",
"eslint-plugin-react": "^7.3.0",
"eslint-plugin-standard": "^3.0.1",
"jest-expo": "~19.0.0",
"react-native-orientation": "^3.0.0",
"react-native-orientation-listener": "0.0.4",
"react-native-scripts": "1.1.0",
"react-native-tableview-simple": "^0.16.8",
"react-redux": "^5.0.5",
"react-test-renderer": "16.0.0-alpha.12",
"redux": "^3.7.2",
"redux-logger": "^3.0.6",
"redux-promise": "^0.5.3",
"redux-thunk": "^2.2.0"
},
"main": "./node_modules/react-native-scripts/build/bin/crna-entry.js",
"scripts": {
"start": "react-native-scripts start",
"eject": "react-native-scripts eject",
"android": "react-native-scripts android",
"ios": "react-native-scripts ios",
"test": "node node_modules/jest/bin/jest.js --watch"
},
"jest": {
"preset": "jest-expo"
},
"dependencies": {
"expo": "^19.0.0",
"react": "16.0.0-alpha.12",
"react-native": "^0.46.1"
}
}
eslint.json
{
"parser": "babel-eslint",
"env": {
"browser": true
},
"plugins": [
"react"
],
"extends": [
"eslint:recommended",
"plugin:react/recommended"
],
"rules": {
}
}
.babelrc
{
"presets": ["react-native"]
}
I have written react-redux before but I did not do the parsing configurations for that project so I am wondering if the syntax error has something to do with that. I am pretty sure my index.js files for the components were written with the same syntax as that in the provided file where the syntax error is.

Can you try the following?
export { default } from './View'
In your index.js

React Hot Loader not reflecting changes in browser

I am working on a react project. I am trying to use react hot loader in it. Everything in the project works fine but I am not able to see the changes in the browser as I make any changes in my component. I followed the official documentation for setting up hot loader. But it is not working. My content gets loaded in browser (localhost:3000) though. What should I do so that hot loader starts showing the changes. Here are my files.
App.js
import React from 'react';
import Userlist from '../containers/user-list';
import UserDetail from '../containers/user-detail';
require('../../scss/style.scss');
import getMuiTheme from 'material-ui/styles/getMuiTheme';
import MuiThemeProvider from 'material-ui/styles/MuiThemeProvider';
import RaisedButton from 'material-ui/RaisedButton';
const App = () => (
<MuiThemeProvider>
<div>
<RaisedButton label="Default" />
<h2>
Usernamess
</h2>
<Userlist/>
<hr/>
<h2>
User Detail
</h2>
<hr/>
<UserDetail/>
</div>
</MuiThemeProvider>
);
export default App;
webpack.config.js
var path = require('path');
var webpack = require('webpack');
module.exports = {
devtool: 'eval',
entry: [
'webpack-dev-server/client?http://localhost:3000',
'webpack/hot/only-dev-server',
'./dev/js/index.js'
],
module: {
loaders: [
{
test: /\.js$/,
loaders: ['react-hot', 'babel'],
include: path.join(__dirname, 'dev')
},
{
test: /\.scss/,
loader: 'style-loader!css-loader!sass-loader'
}
]
},
output: {
path: path.join(__dirname, 'dist'),
filename: 'bundle.js',
publicPath: '/static/'
},
plugins: [
new webpack.HotModuleReplacementPlugin()
]
};
package.json
{
"name": "react-redux-template",
"version": "1.0.0",
"main": "index.js",
"scripts": {
"start": "node server.js",
"lint": "eslint src"
},
"license": "ISC",
"dependencies": {
"babel-core": "^6.10.4",
"babel-loader": "^6.2.4",
"babel-polyfill": "^6.9.1",
"babel-preset-es2015": "^6.9.0",
"babel-preset-react": "^6.11.1",
"babel-register": "^6.9.0",
"cross-env": "^1.0.8",
"css-loader": "^0.23.1",
"expect": "^1.20.1",
"material-ui": "^0.15.4",
"node-libs-browser": "^1.0.0",
"node-sass": "^3.8.0",
"react": "^15.1.0",
"react-addons-test-utils": "^15.1.0",
"react-dom": "^15.1.0",
"react-redux": "^4.4.5",
"react-tap-event-plugin": "^1.0.0",
"redux": "^3.5.2",
"redux-logger": "^2.6.1",
"redux-promise": "^0.5.3",
"redux-thunk": "^2.1.0",
"sass-loader": "^4.0.0",
"style-loader": "^0.13.1",
"webpack": "^1.13.1",
"webpack-dev-middleware": "^1.6.1",
"webpack-dev-server": "^1.14.1",
"webpack-hot-middleware": "^2.11.0"
},
"devDependencies": {
"babel-plugin-react-transform": "^2.0.2",
"babel-preset-stage-0": "^6.5.0",
"react-transform-hmr": "^1.0.4",
"react-hot-loader": "^1.3.0"
}
}
server.js
var webpack = require('webpack');
var WebpackDevServer = require('webpack-dev-server');
var config = require('./webpack.config');
new WebpackDevServer(webpack(config), {
publicPath: config.output.publicPath,
hot: true,
historyApiFallback: true
}).listen(3000, 'localhost', function (err, result) {
if (err) {
return console.log(err);
}
console.log('Listening at http://localhost:3000/');
});

An abstract from hot loader official thread https://github.com/gaearon/react-hot-loader/blob/master/docs/Troubleshooting.md
"The following modules couldn't be hot updated: (They would need a full reload!)
If you get this warning when editing a root component, this may be because you don't export anything from it, and call React.render from there. Put your root component in a separate file (e.g. App.jsx) and require it from index.js where you call React.render."
So I made changes in my App.js
export default class App extends Component {
render() {
return (
<MuiThemeProvider>
<div>
<RaisedButton label="Default" />
<h2>
Usernamess
</h2>
<Userlist/>
<hr/>
<h2>
User Deta
</h2>
<hr/>
<UserDetail/>
</div>
</MuiThemeProvider>
);
}
}