MaximeHeckel

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MaximeHeckel

import React from "react";


const Announcements = (props) => {
  return (
      <div aria-live="polite" aria-atomic="true" 
        className="visuallyhidden">
        {props.message}
      </div>
  );

MaximeHeckel

import { ThemeProvider as EmotionThemeProvider } from 'emotion-theming';
import React from 'react';
import themeDark from '../theme_dark';
import themeLight from '../theme_light';

interface InterfaceState {
  dark: boolean;
  toggleDark: () => void;
}

MaximeHeckel

const sequence = ['arg1', 'arg2','arg3'].reduce(async (previousPromise, nextArg) => {
  await previousPromise;
  return somePromise(nextArg)
}, Promise.resolve());

sequence
  .then(() => console.log('Done'))
  .catch((e) => console.error(`An error occured: ${e}`));

MaximeHeckel

// reducer.js
export const initialState = {
  data: null
};

const reducer = (state, action) => {
  const reduced = { ...state };
  switch (action.type) {
    case "FETCH_DATA":
      return {

MaximeHeckel

import React, { useState, useContext, useEffect, createContext } from "react";
import logo from "./logo.svg";
import "./App.css";

const CounterContext = createContext(0);

const Hello = () => {
  // This avoids render props and the use of Context.Consumer
  // way easier!
  const count = useContext(CounterContext);

MaximeHeckel

import React, { Suspense, Fragment } from "react";
import { createCache, createResource } from "simple-cache-provider";

const cache = createCache();

const createFetcher = callback => {
  const resource = createResource(callback);
  return () => resource.read(cache);
};

MaximeHeckel

// @flow
import * as React from 'react'

// This creates the "Article Context" i.e. an object containing a Provider and a Consumer component
// $FlowFixMe
const ArticleContext = React.createContext();

// We use classes here instead of functional components for our sub-components
// so we can define a type for each one of them

MaximeHeckel

      <Article>  
        <Article.Title />
        {/* 
          This will render if we use the sub-component pattern described in part 2,
          but will be skipped with the one described in part 1 (the findByType util 
          mentioned in the post will simply not render "<div></div>" as it's not
          a known sub-components of <Article/>.
        */}
        <div>Hello World</div>
         <Article.Metadata />

MaximeHeckel

import React, { Component } from "react";
import Article from "./Article";

const text = `
  Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.
`;

class App extends Component {
  constructor() {
    this.state = {