Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning. Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: Inside App.js, we first import the LoginContainer.

A block of code is set as follows:

import React, { Component } from 'react';
import LoginContainer from './LoginContainer';
import './app.css';


class App extends Component {
  render() {
    return <LoginContainer />
  }
}

export default App;

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

if (module.hot) {
  module.hot.accept('./components/App', () => {
    const NextApp = require('./components/App').default;
    ReactDOM.render(
      <App/>,
      document.getElementById('root')
    );
  });
}

Any command-line input or output is written as follows:

 yarn add css-loader style-loader

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: Flip back to the app, and you should see the Hello from LoginContainer of our new component.