Merge branch 'refactor-index'

content/home/examples/a-component-using-external-plugins.js

@@ -0,0 +1,35 @@
+class MarkdownEditor extends React.Component {
+  constructor(props) {
+    super(props);
+    this.handleChange = this.handleChange.bind(this);
+    this.state = { value: 'Type some *markdown* here!' };
+  }
+
+  handleChange(e) {
+    this.setState({ value: e.target.value });
+  }
+
+  getRawMarkup() {
+    const md = new Remarkable();
+    return { __html: md.render(this.state.value) };
+  }
+
+  render() {
+    return (
+      <div className="MarkdownEditor">
+        <h3>Input</h3>
+        <textarea
+          onChange={this.handleChange}
+          defaultValue={this.state.value}
+        />
+        <h3>Output</h3>
+        <div
+          className="content"
+          dangerouslySetInnerHTML={this.getRawMarkup()}
+        />
+      </div>
+    );
+  }
+}
+
+ReactDOM.render(<MarkdownEditor />, mountNode);

content/home/examples/a-component-using-external-plugins.md

@@ -0,0 +1,6 @@
+---
+title: A Component Using External Plugins
+order: 3
+---
+
+React is flexible and provides hooks that allow you to interface with other libraries and frameworks. This example uses **remarkable**, an external Markdown library, to convert the `<textarea>`'s value in real time.

content/home/examples/a-simple-component.js

@@ -0,0 +1,14 @@
+class HelloMessage extends React.Component {
+  render() {
+    return (
+      <div>
+        Hello {this.props.name}
+      </div>
+    );
+  }
+}
+
+ReactDOM.render(
+  <HelloMessage name="Taylor" />,
+  mountNode
+);

content/home/examples/a-simple-component.md

@@ -0,0 +1,8 @@
+---
+title: A Simple Component
+order: 0
+---
+
+React components implement a `render()` method that takes input data and returns what to display. This example uses an XML-like syntax called JSX. Input data that is passed into the component can be accessed by `render()` via `this.props`.
+
+**JSX is optional and not required to use React.** Try the [Babel REPL](http://babeljs.io/repl#?babili=false&browsers=&build=&builtIns=false&code_lz=MYGwhgzhAEASCmIQHsCy8pgOb2vAHgC7wB2AJjAErxjCEB0AwsgLYAOyJph0A3gFDRoAJ1Jl4wgBQBKPoKEj4hAK7CS0SfIXQAPGQCWANwB8W7XEQo-hABb6I9NsORsHJMC3gBfM0J0B6AxMzaQBueR8ffmpaQgARAHlUelFyCU0_BCQ0DAhsXHdPAF4AIgAVMABPFGES6H9jABp5FmRlEkIAOWRxfjCgA&debug=false&circleciRepo=&evaluate=false&lineWrap=false&presets=react&targets=&version=6.26.0) to see the raw JavaScript code produced by the JSX compilation step.

content/home/examples/a-stateful-component.js

@@ -0,0 +1,30 @@
+class Timer extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = { seconds: 0 };
+  }
+
+  tick() {
+    this.setState(prevState => ({
+      seconds: prevState.seconds + 1
+    }));
+  }
+
+  componentDidMount() {
+    this.interval = setInterval(() => this.tick(), 1000);
+  }
+
+  componentWillUnmount() {
+    clearInterval(this.interval);
+  }
+
+  render() {
+    return (
+      <div>
+        Seconds: {this.state.seconds}
+      </div>
+    );
+  }
+}
+
+ReactDOM.render(<Timer />, mountNode);

content/home/examples/a-stateful-component.md

@@ -0,0 +1,6 @@
+---
+title: A Stateful Component
+order: 1
+---
+
+In addition to taking input data (accessed via `this.props`), a component can maintain internal state data (accessed via `this.state`). When a component's state data changes, the rendered markup will be updated by re-invoking `render()`.

content/home/examples/an-application.js

@@ -0,0 +1,59 @@
+class TodoApp extends React.Component {
+  constructor(props) {
+    super(props);
+    this.state = { items: [], text: '' };
+    this.handleChange = this.handleChange.bind(this);
+    this.handleSubmit = this.handleSubmit.bind(this);
+  }
+
+  render() {
+    return (
+      <div>
+        <h3>TODO</h3>
+        <TodoList items={this.state.items} />
+        <form onSubmit={this.handleSubmit}>
+          <input
+            onChange={this.handleChange}
+            value={this.state.text}
+          />
+          <button>
+            Add #{this.state.items.length + 1}
+          </button>
+        </form>
+      </div>
+    );
+  }
+
+  handleChange(e) {
+    this.setState({ text: e.target.value });
+  }
+
+  handleSubmit(e) {
+    e.preventDefault();
+    if (!this.state.text.length) {
+      return;
+    }
+    const newItem = {
+      text: this.state.text,
+      id: Date.now()
+    };
+    this.setState(prevState => ({
+      items: prevState.items.concat(newItem),
+      text: ''
+    }));
+  }
+}
+
+class TodoList extends React.Component {
+  render() {
+    return (
+      <ul>
+        {this.props.items.map(item => (
+          <li key={item.id}>{item.text}</li>
+        ))}
+      </ul>
+    );
+  }
+}
+
+ReactDOM.render(<TodoApp />, mountNode);

content/home/examples/an-application.md

@@ -0,0 +1,6 @@
+---
+title: An Application
+order: 2
+---
+
+Using `props` and `state`, we can put together a small Todo application. This example uses `state` to track the current list of items as well as the text that the user has entered. Although event handlers appear to be rendered inline, they will be collected and implemented using event delegation.

content/home/marketing/component-based.md

@@ -0,0 +1,8 @@
+---
+title: Component-Based
+order: 1
+---
+
+Build encapsulated components that manage their own state, then compose them to make complex UIs.
+
+Since component logic is written in JavaScript instead of templates, you can easily pass rich data through your app and keep state out of the DOM.

content/home/marketing/declarative.md

@@ -0,0 +1,8 @@
+---
+title: Declarative
+order: 0
+---
+
+React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes.
+
+Declarative views make your code more predictable and easier to debug.

content/home/marketing/learn-once-write-anywhere.md

@@ -0,0 +1,8 @@
+---
+title: Learn Once, Write Anywhere
+order: 2
+---
+
+We don't make assumptions about the rest of your technology stack, so you can develop new features in React without rewriting existing code.
+
+React can also render on the server using Node and power mobile apps using [React Native](https://facebook.github.io/react-native/).

content/index.md

@@ -1,76 +0,0 @@
----
-layout: hero
-title: A JavaScript library for building user interfaces
-id: home
----
-
-<section class="light home-section">
-  <div class="marketing-row">
-    <div class="marketing-col">
-      <h3>Declarative</h3>
-      <p>React makes it painless to create interactive UIs. Design simple views for each state in your application, and React will efficiently update and render just the right components when your data changes.</p>
-      <p>Declarative views make your code more predictable and easier to debug.</p>
-    </div>
-    <div class="marketing-col">
-      <h3>Component-Based</h3>
-      <p>Build encapsulated components that manage their own state, then compose them to make complex UIs.</p>
-      <p>Since component logic is written in JavaScript instead of templates, you can easily pass rich data through your app and keep state out of the DOM.</p>
-    </div>
-    <div class="marketing-col">
-      <h3>Learn Once, Write Anywhere</h3>
-      <p>We don't make assumptions about the rest of your technology stack, so you can develop new features in React without rewriting existing code.</p>
-      <p>React can also render on the server using Node and power mobile apps using <a href="https://facebook.github.io/react-native/">React Native</a>.</p>
-    </div>
-  </div>
-</section>
-<hr class="home-divider" />
-<section class="home-section">
-  <div id="examples">
-    <div class="example">
-      <h3>A Simple Component</h3>
-      <p>
-        React components implement a `render()` method that takes input data and
-        returns what to display. This example uses an XML-like syntax called
-        JSX. Input data that is passed into the component can be accessed by
-        `render()` via `this.props`.
-      </p>
-      <p>
-        <strong>JSX is optional and not required to use React.</strong>
-        Try the
-        <a href="http://babeljs.io/repl#?babili=false&browsers=&build=&builtIns=false&code_lz=MYGwhgzhAEASCmIQHsCy8pgOb2vAHgC7wB2AJjAErxjCEB0AwsgLYAOyJph0A3gFABIAE6ky8YQAoAlHyEj4hAK7CS0ADxkAlgDcAfAiTI-hABZaI9NsORtLJMC3gBfdQHpt-gNxDn_P_zUtIQAIgDyqPSi5BKS6oYo6Jg40A5OALwARCHwOlokmdBuegA00CzISiSEAHLI4tJeQA&debug=false&circleciRepo=&evaluate=false&lineWrap=false&presets=react&prettier=true&targets=&version=6.26.0">Babel REPL</a>
-        to see the raw JavaScript code produced by the JSX compilation step.
-      </p>
-      <div id="helloExample"></div>
-    </div>
-    <div class="example">
-      <h3>A Stateful Component</h3>
-      <p>
-        In addition to taking input data (accessed via `this.props`), a
-        component can maintain internal state data (accessed via `this.state`).
-        When a component's state data changes, the rendered markup will be
-        updated by re-invoking `render()`.
-      </p>
-      <div id="timerExample"></div>
-    </div>
-    <div class="example">
-      <h3>An Application</h3>
-      <p>
-        Using `props` and `state`, we can put together a small Todo application.
-        This example uses `state` to track the current list of items as well as
-        the text that the user has entered. Although event handlers appear to be
-        rendered inline, they will be collected and implemented using event
-        delegation.
-      </p>
-      <div id="todoExample"></div>
-    </div>
-    <div class="example">
-      <h3>A Component Using External Plugins</h3>
-      <p>
-        React is flexible and provides hooks that allow you to interface with
-        other libraries and frameworks. This example uses <strong>remarkable</strong>, an
-        external Markdown library, to convert the textarea's value in real time.
-      </p>
-      <div id="markdownExample"></div>
-    </div>
-  </div>
-</section>

gatsby-config.js

@@ -19,6 +19,7 @@ module.exports = {
   plugins: [
     'gatsby-source-react-error-codes',
     'gatsby-transformer-authors-yaml',
+    'gatsby-transformer-home-example-code',
     'gatsby-plugin-netlify',
     'gatsby-plugin-glamor',
     'gatsby-plugin-react-next',

gatsby-node.js

@@ -32,7 +32,13 @@ exports.createPages = async ({graphql, boundActionCreators}) => {
   const communityTemplate = resolve('./src/templates/community.js');
   const docsTemplate = resolve('./src/templates/docs.js');
   const tutorialTemplate = resolve('./src/templates/tutorial.js');
-  const homeTemplate = resolve('./src/templates/home.js');
+
+  // Redirect /index.html to root.
+  createRedirect({
+    fromPath: '/index.html',
+    redirectInBrowser: true,
+    toPath: '/',
+  });
 
   const allMarkdown = await graphql(
     `
@@ -60,15 +66,7 @@ exports.createPages = async ({graphql, boundActionCreators}) => {
   allMarkdown.data.allMarkdownRemark.edges.forEach(edge => {
     const slug = edge.node.fields.slug;
 
-    if (slug === '/index.html') {
-      createPage({
-        path: '/',
-        component: homeTemplate,
-        context: {
-          slug,
-        },
-      });
-    } else if (slug === 'docs/error-decoder.html') {
+    if (slug === 'docs/error-decoder.html') {
       // No-op so far as markdown templates go.
       // Error codes are managed by a page in src/pages
       // (which gets created by Gatsby during a separate phase).
@@ -210,7 +208,7 @@ exports.onCreateNode = ({node, boundActionCreators, getNode}) => {
       if (!slug) {
         slug = `/${relativePath.replace('.md', '.html')}`;
 
-        // This should (probably) only happen for the index.md,
+        // This should only happen for the partials in /content/home,
         // But let's log it in case it happens for other files also.
         console.warn(
           `Warning: No slug found for "${relativePath}". Falling back to default "${slug}".`,

plugins/gatsby-transformer-home-example-code/gatsby-node.js

@@ -0,0 +1,28 @@
+const {readdirSync, readFileSync} = require('fs');
+const {join, resolve} = require('path');
+
+// Store code snippets in GraphQL for the home page examples.
+// Snippets will be matched with markdown templates of the same name.
+exports.sourceNodes = ({graphql, boundActionCreators}) => {
+  const {createNode} = boundActionCreators;
+
+  const path = resolve(__dirname, '../../content/home/examples');
+  const files = readdirSync(path);
+
+  files.forEach(file => {
+    if (file.match(/\.js$/)) {
+      const code = readFileSync(join(path, file), 'utf8');
+      const id = file.replace(/\.js$/, '');
+
+      createNode({
+        id,
+        children: [],
+        parent: 'EXAMPLES',
+        internal: {
+          type: 'ExampleCode',
+          contentDigest: JSON.stringify(code),
+        },
+      });
+    }
+  });
+};

plugins/gatsby-transformer-home-example-code/package.json

@@ -0,0 +1,4 @@
+{
+  "name": "gatsby-transformer-home-example-code",
+  "version": "0.0.1"
+}

src/pages/index.js

@@ -0,0 +1,421 @@
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * @emails react-core
+ */
+
+'use strict';
+
+import ButtonLink from 'components/ButtonLink';
+import Container from 'components/Container';
+import Flex from 'components/Flex';
+import mountCodeExample from 'utils/mountCodeExample';
+import PropTypes from 'prop-types';
+import React, {Component} from 'react';
+import TitleAndMetaTags from 'components/TitleAndMetaTags';
+import {colors, media, sharedStyles} from 'theme';
+import createOgUrl from 'utils/createOgUrl';
+import loadScript from 'utils/loadScript';
+import {babelURL} from 'site-constants';
+import ReactDOM from 'react-dom';
+
+class Home extends Component {
+  constructor(props, context) {
+    super(props, context);
+
+    const {data} = props;
+
+    const code = data.code.edges.reduce((map, {node}) => {
+      map[node.id] = JSON.parse(node.internal.contentDigest);
+
+      return map;
+    }, {});
+
+    const examples = data.examples.edges.map(({node}) => ({
+      content: node.html,
+      id: node.fields.slug.replace(/^.+\//, '').replace('.html', ''),
+      title: node.frontmatter.title,
+    }));
+
+    const marketing = data.marketing.edges.map(({node}) => ({
+      title: node.frontmatter.title,
+      content: node.html,
+    }));
+
+    this.state = {
+      code,
+      examples,
+      marketing,
+    };
+  }
+
+  componentDidMount() {
+    const {code, examples} = this.state;
+
+    examples.forEach(({id}) => {
+      renderExamplePlaceholder(id);
+    });
+
+    function mountCodeExamples() {
+      examples.forEach(({id}) => {
+        mountCodeExample(id, code[id]);
+      });
+    }
+
+    loadScript(babelURL).then(mountCodeExamples, error => {
+      console.error('Babel failed to load.');
+
+      mountCodeExamples();
+    });
+  }
+
+  render() {
+    const {examples, marketing} = this.state;
+
+    return (
+      <div css={{width: '100%'}}>
+        <TitleAndMetaTags
+          title="React - A JavaScript library for building user interfaces"
+          ogUrl={createOgUrl('index.html')}
+        />
+        <header
+          css={{
+            backgroundColor: colors.dark,
+            color: colors.white,
+          }}>
+          <div
+            css={{
+              paddingTop: 45,
+              paddingBottom: 20,
+
+              [media.greaterThan('small')]: {
+                paddingTop: 60,
+                paddingBottom: 70,
+              },
+
+              [media.greaterThan('xlarge')]: {
+                paddingTop: 95,
+                paddingBottom: 85,
+                maxWidth: 1500, // Positioning of background logo
+                marginLeft: 'auto',
+                marginRight: 'auto',
+                backgroundImage: 'url(/large-logo.svg)',
+                backgroundRepeat: 'no-repeat',
+                backgroundPosition: '100% 100px',
+                backgroundSize: '50% auto',
+              },
+            }}>
+            <Container>
+              <h1
+                css={{
+                  color: colors.brand,
+                  textAlign: 'center',
+                  margin: 0,
+                  fontSize: 45,
+                  letterSpacing: '0.01em',
+                  [media.size('xsmall')]: {
+                    fontSize: 30,
+                  },
+                  [media.greaterThan('xlarge')]: {
+                    fontSize: 60,
+                  },
+                }}>
+                React
+              </h1>
+              <p
+                css={{
+                  paddingTop: 15,
+                  textAlign: 'center',
+                  fontSize: 24,
+                  letterSpacing: '0.01em',
+                  fontWeight: 200,
+
+                  [media.size('xsmall')]: {
+                    fontSize: 16,
+                    maxWidth: '12em',
+                    marginLeft: 'auto',
+                    marginRight: 'auto',
+                  },
+
+                  [media.greaterThan('xlarge')]: {
+                    paddingTop: 20,
+                    fontSize: 30,
+                  },
+                }}>
+                A JavaScript library for building user interfaces
+              </p>
+              <Flex
+                valign="center"
+                css={{
+                  paddingTop: 40,
+
+                  [media.greaterThan('xlarge')]: {
+                    paddingTop: 65,
+                  },
+                }}>
+                <CtaItem>
+                  <ButtonLink to="/docs/hello-world.html" type="primary">
+                    Get Started
+                  </ButtonLink>
+                </CtaItem>
+                <CtaItem>
+                  <ButtonLink to="/tutorial/tutorial.html" type="secondary">
+                    Take the Tutorial
+                  </ButtonLink>
+                </CtaItem>
+              </Flex>
+            </Container>
+          </div>
+        </header>
+
+        <Container>
+          <div css={sharedStyles.markdown}>
+            <section
+              css={[
+                sectionStyles,
+                {
+                  [media.lessThan('medium')]: {
+                    marginTop: 0,
+                    marginBottom: 0,
+                    overflowX: 'auto',
+                    paddingTop: 30,
+                    WebkitOverflowScrolling: 'touch',
+                    position: 'relative',
+                    maskImage:
+                      'linear-gradient(to right, transparent, white 10px, white 90%, transparent)',
+                  },
+                },
+              ]}>
+              <div
+                css={{
+                  display: 'flex',
+                  flexDirection: 'row',
+
+                  [media.lessThan('medium')]: {
+                    display: 'block',
+                    whiteSpace: 'nowrap',
+                  },
+                }}>
+                {marketing.map((column, index) => (
+                  <div
+                    key={index}
+                    css={{
+                      display: 'flex',
+                      flexDirection: 'column',
+                      flex: '0 1 33%',
+                      marginLeft: 40,
+
+                      '&:first-of-type': {
+                        marginLeft: 0,
+
+                        [media.lessThan('medium')]: {
+                          marginLeft: 10,
+                        },
+                      },
+
+                      [media.lessThan('medium')]: {
+                        display: 'inline-block',
+                        verticalAlign: 'top',
+                        marginLeft: 0,
+                        whiteSpace: 'normal',
+                        width: '75%',
+                        marginRight: 20,
+                        paddingBottom: 40,
+
+                        '&:first-of-type': {
+                          marginTop: 0,
+                        },
+                      },
+                    }}>
+                    <h3
+                      css={[
+                        headingStyles,
+                        {
+                          '&&': {
+                            // Make specificity higher than the site-wide h3 styles.
+                            color: colors.subtle,
+                            paddingTop: 0,
+                            fontWeight: 300,
+                            fontSize: 20,
+
+                            [media.greaterThan('xlarge')]: {
+                              fontSize: 24,
+                              fontWeight: 200,
+                            },
+                          },
+                        },
+                      ]}>
+                      {column.title}
+                    </h3>
+                    <div dangerouslySetInnerHTML={{__html: column.content}} />
+                  </div>
+                ))}
+              </div>
+            </section>
+            <hr
+              css={{
+                height: 1,
+                marginBottom: -1,
+                border: 'none',
+                borderBottom: `1 solid ${colors.divider}`,
+              }}
+            />
+            <section css={sectionStyles}>
+              <div id="examples">
+                {examples.map((example, index) => (
+                  <div
+                    key={index}
+                    css={{
+                      marginTop: 40,
+
+                      '&:first-child': {
+                        marginTop: 0,
+                      },
+
+                      [media.greaterThan('xlarge')]: {
+                        marginTop: 80,
+                      },
+                    }}>
+                    <h3 css={headingStyles}>{example.title}</h3>
+                    <div dangerouslySetInnerHTML={{__html: example.content}} />
+                    <div id={example.id} />
+                  </div>
+                ))}
+              </div>
+            </section>
+          </div>
+        </Container>
+
+        <section
+          css={{
+            background: colors.dark,
+            color: colors.white,
+            paddingTop: 45,
+            paddingBottom: 45,
+          }}>
+          <Container>
+            <Flex valign="center">
+              <CtaItem>
+                <ButtonLink to="/docs/hello-world.html" type="primary">
+                  Get Started
+                </ButtonLink>
+              </CtaItem>
+              <CtaItem>
+                <ButtonLink to="/tutorial/tutorial.html" type="secondary">
+                  Take the Tutorial
+                </ButtonLink>
+              </CtaItem>
+            </Flex>
+          </Container>
+        </section>
+      </div>
+    );
+  }
+}
+
+Home.propTypes = {
+  data: PropTypes.shape({
+    code: PropTypes.object.isRequired,
+    examples: PropTypes.object.isRequired,
+    marketing: PropTypes.object.isRequired,
+  }).isRequired,
+  location: PropTypes.object.isRequired,
+};
+
+function renderExamplePlaceholder(containerId) {
+  ReactDOM.render(
+    <h4>Loading code example...</h4>,
+    document.getElementById(containerId),
+  );
+}
+
+const CtaItem = ({children, primary = false}) => (
+  <div
+    css={{
+      width: '50%',
+
+      [media.between('small', 'large')]: {
+        paddingLeft: 20,
+      },
+
+      [media.greaterThan('xlarge')]: {
+        paddingLeft: 40,
+      },
+
+      '&:first-child': {
+        textAlign: 'right',
+        paddingRight: 15,
+      },
+
+      '&:nth-child(2)': {
+        [media.greaterThan('small')]: {
+          paddingLeft: 15,
+        },
+      },
+    }}>
+    {children}
+  </div>
+);
+
+// eslint-disable-next-line no-undef
+export const pageQuery = graphql`
+  query IndexMarkdown {
+    code: allExampleCode {
+      edges {
+        node {
+          id
+          internal {
+            contentDigest
+          }
+        }
+      }
+    }
+    examples: allMarkdownRemark(
+      filter: {id: {regex: "//home/examples//"}}
+      sort: {fields: [frontmatter___order], order: ASC}
+    ) {
+      edges {
+        node {
+          fields {
+            slug
+          }
+          frontmatter {
+            title
+          }
+          html
+        }
+      }
+    }
+    marketing: allMarkdownRemark(
+      filter: {id: {regex: "//home/marketing//"}}
+      sort: {fields: [frontmatter___order], order: ASC}
+    ) {
+      edges {
+        node {
+          frontmatter {
+            title
+          }
+          html
+        }
+      }
+    }
+  }
+`;
+
+export default Home;
+
+const sectionStyles = {
+  marginTop: 20,
+  marginBottom: 15,
+
+  [media.greaterThan('medium')]: {
+    marginTop: 60,
+    marginBottom: 65,
+  },
+};
+
+const headingStyles = {
+  '&&': {
+    marginBottom: 20,
+  },
+};

src/templates/home.js

@@ -1,493 +0,0 @@
-/**
- * Copyright (c) 2013-present, Facebook, Inc.
- *
- * @emails react-core
- */
-
-'use strict';
-
-import ButtonLink from './components/ButtonLink';
-import Container from 'components/Container';
-import Flex from 'components/Flex';
-import mountCodeExample from 'utils/mountCodeExample';
-import PropTypes from 'prop-types';
-import React, {Component} from 'react';
-import TitleAndMetaTags from 'components/TitleAndMetaTags';
-import {colors, media, sharedStyles} from 'theme';
-import createOgUrl from 'utils/createOgUrl';
-import loadScript from 'utils/loadScript';
-import {babelURL} from 'site-constants';
-import ReactDOM from 'react-dom';
-
-class Home extends Component {
-  componentDidMount() {
-    renderExamplePlaceholder('helloExample');
-    renderExamplePlaceholder('timerExample');
-    renderExamplePlaceholder('todoExample');
-    renderExamplePlaceholder('markdownExample');
-
-    function mountCodeExamples() {
-      mountCodeExample('helloExample', HELLO_COMPONENT);
-      mountCodeExample('timerExample', TIMER_COMPONENT);
-      mountCodeExample('todoExample', TODO_COMPONENT);
-      mountCodeExample('markdownExample', MARKDOWN_COMPONENT);
-    }
-
-    loadScript(babelURL).then(mountCodeExamples, error => {
-      console.error('Babel failed to load.');
-
-      mountCodeExamples();
-    });
-  }
-
-  render() {
-    const {data} = this.props;
-    const title = 'React - A JavaScript library for building user interfaces';
-
-    return (
-      <div css={{width: '100%'}}>
-        <TitleAndMetaTags
-          title={title}
-          ogUrl={createOgUrl(data.markdownRemark.fields.slug)}
-        />
-        <header
-          css={{
-            backgroundColor: colors.dark,
-            color: colors.white,
-          }}>
-          <div
-            css={{
-              paddingTop: 45,
-              paddingBottom: 20,
-
-              [media.greaterThan('small')]: {
-                paddingTop: 60,
-                paddingBottom: 70,
-              },
-
-              [media.greaterThan('xlarge')]: {
-                paddingTop: 95,
-                paddingBottom: 85,
-                maxWidth: 1500, // Positioning of background logo
-                marginLeft: 'auto',
-                marginRight: 'auto',
-                backgroundImage: 'url(/large-logo.svg)',
-                backgroundRepeat: 'no-repeat',
-                backgroundPosition: '100% 100px',
-                backgroundSize: '50% auto',
-              },
-            }}>
-            <Container>
-              <h1
-                css={{
-                  color: colors.brand,
-                  textAlign: 'center',
-                  margin: 0,
-                  fontSize: 45,
-                  letterSpacing: '0.01em',
-                  [media.size('xsmall')]: {
-                    fontSize: 30,
-                  },
-                  [media.greaterThan('xlarge')]: {
-                    fontSize: 60,
-                  },
-                }}>
-                React
-              </h1>
-              <p
-                css={{
-                  paddingTop: 15,
-                  textAlign: 'center',
-                  fontSize: 24,
-                  letterSpacing: '0.01em',
-                  fontWeight: 200,
-
-                  [media.size('xsmall')]: {
-                    fontSize: 16,
-                    maxWidth: '12em',
-                    marginLeft: 'auto',
-                    marginRight: 'auto',
-                  },
-
-                  [media.greaterThan('xlarge')]: {
-                    paddingTop: 20,
-                    fontSize: 30,
-                  },
-                }}>
-                A JavaScript library for building user interfaces
-              </p>
-              <Flex
-                valign="center"
-                css={{
-                  paddingTop: 40,
-
-                  [media.greaterThan('xlarge')]: {
-                    paddingTop: 65,
-                  },
-                }}>
-                <CtaItem>
-                  <ButtonLink to="/docs/hello-world.html" type="primary">
-                    Get Started
-                  </ButtonLink>
-                </CtaItem>
-                <CtaItem>
-                  <ButtonLink to="/tutorial/tutorial.html" type="secondary">
-                    Take the Tutorial
-                  </ButtonLink>
-                </CtaItem>
-              </Flex>
-            </Container>
-          </div>
-        </header>
-
-        <Container>
-          <div
-            css={[sharedStyles.markdown, markdownStyles]}
-            dangerouslySetInnerHTML={{__html: data.markdownRemark.html}}
-          />
-        </Container>
-
-        <section
-          css={{
-            background: colors.dark,
-            color: colors.white,
-            paddingTop: 45,
-            paddingBottom: 45,
-          }}>
-          <Container>
-            <Flex valign="center">
-              <CtaItem>
-                <ButtonLink to="/docs/hello-world.html" type="primary">
-                  Get Started
-                </ButtonLink>
-              </CtaItem>
-              <CtaItem>
-                <ButtonLink to="/tutorial/tutorial.html" type="secondary">
-                  Take the Tutorial
-                </ButtonLink>
-              </CtaItem>
-            </Flex>
-          </Container>
-        </section>
-      </div>
-    );
-  }
-}
-
-Home.propTypes = {
-  data: PropTypes.object.isRequired,
-  location: PropTypes.object.isRequired,
-};
-
-// TODO Improve this temporarily placeholder as part of
-// converting the home page from markdown template to a Gatsby
-// page (see issue #2)
-function renderExamplePlaceholder(containerId) {
-  ReactDOM.render(
-    <h4>Loading code example...</h4>,
-    document.getElementById(containerId),
-  );
-}
-
-const CtaItem = ({children, primary = false}) => (
-  <div
-    css={{
-      width: '50%',
-
-      [media.between('small', 'large')]: {
-        paddingLeft: 20,
-      },
-
-      [media.greaterThan('xlarge')]: {
-        paddingLeft: 40,
-      },
-
-      '&:first-child': {
-        textAlign: 'right',
-        paddingRight: 15,
-      },
-
-      '&:nth-child(2)': {
-        [media.greaterThan('small')]: {
-          paddingLeft: 15,
-        },
-      },
-    }}>
-    {children}
-  </div>
-);
-
-// eslint-disable-next-line no-undef
-export const pageQuery = graphql`
-  query HomeMarkdown($slug: String!) {
-    markdownRemark(fields: {slug: {eq: $slug}}) {
-      html
-      frontmatter {
-        title
-      }
-      fields {
-        slug
-      }
-    }
-  }
-`;
-
-export default Home;
-
-// TODO This nasty CSS is required because 'docs/index.md' defines hard-coded class names.
-const markdownStyles = {
-  '& .home-section': {
-    marginTop: 20,
-    marginBottom: 15,
-
-    [media.greaterThan('medium')]: {
-      marginTop: 60,
-      marginBottom: 65,
-    },
-  },
-
-  '& .home-section:first-child': {
-    [media.lessThan('medium')]: {
-      marginTop: 0,
-      marginBottom: 0,
-      overflowX: 'auto',
-      paddingTop: 30,
-      WebkitOverflowScrolling: 'touch',
-      position: 'relative',
-      maskImage:
-        'linear-gradient(to right, transparent, white 10px, white 90%, transparent)',
-    },
-  },
-
-  '& .homeDivider': {
-    height: 1,
-    marginBottom: -1,
-    border: 'none',
-    borderBottom: `1 solid ${colors.divider}`,
-  },
-
-  '& .marketing-row': {
-    display: 'flex',
-    flexDirection: 'row',
-
-    [media.lessThan('medium')]: {
-      display: 'block',
-      whiteSpace: 'nowrap',
-    },
-  },
-
-  '& .marketing-col': {
-    display: 'flex',
-    flexDirection: 'column',
-    flex: '0 1 33%',
-    marginLeft: 40,
-
-    '&:first-of-type': {
-      marginLeft: 0,
-
-      [media.lessThan('medium')]: {
-        marginLeft: 10,
-      },
-    },
-
-    [media.lessThan('medium')]: {
-      display: 'inline-block',
-      verticalAlign: 'top',
-      marginLeft: 0,
-      whiteSpace: 'normal',
-      width: '75%',
-      marginRight: 20,
-      paddingBottom: 40,
-
-      '&:first-of-type': {
-        marginTop: 0,
-      },
-    },
-
-    '& h3': {
-      color: colors.subtle,
-      paddingTop: 0,
-      fontWeight: 300,
-      fontSize: 20,
-
-      [media.greaterThan('xlarge')]: {
-        fontSize: 24,
-        fontWeight: 200,
-      },
-    },
-
-    '& p': {
-      lineHeight: 1.7,
-    },
-
-    '& h3 + p': {
-      marginTop: 20,
-    },
-  },
-
-  '& .example': {
-    marginTop: 40,
-
-    '&:first-child': {
-      marginTop: 0,
-    },
-
-    [media.greaterThan('xlarge')]: {
-      marginTop: 80,
-    },
-  },
-};
-
-// TODO Move these hard-coded examples into example files and out of the template?
-// Alternately, move them into the markdown and transform them during build?
-// This could be done via a new Gatsby transform plug-in that auto-converts to runnable REPLs?
-const name = Math.random() > 0.5 ? 'John' : 'Jane';
-const HELLO_COMPONENT = `
-class HelloMessage extends React.Component {
-  render() {
-    return (
-      <div>
-        Hello {this.props.name}
-      </div>
-    );
-  }
-}
-
-ReactDOM.render(
-  <HelloMessage name="${name}" />,
-  mountNode
-);
-`.trim();
-
-const TIMER_COMPONENT = `
-class Timer extends React.Component {
-  constructor(props) {
-    super(props);
-    this.state = { seconds: 0 };
-  }
-
-  tick() {
-    this.setState(prevState => ({
-      seconds: prevState.seconds + 1
-    }));
-  }
-
-  componentDidMount() {
-    this.interval = setInterval(() => this.tick(), 1000);
-  }
-
-  componentWillUnmount() {
-    clearInterval(this.interval);
-  }
-
-  render() {
-    return (
-      <div>
-        Seconds: {this.state.seconds}
-      </div>
-    );
-  }
-}
-
-ReactDOM.render(<Timer />, mountNode);
-`.trim();
-
-var TODO_COMPONENT = `
-class TodoApp extends React.Component {
-  constructor(props) {
-    super(props);
-    this.state = { items: [], text: '' };
-    this.handleChange = this.handleChange.bind(this);
-    this.handleSubmit = this.handleSubmit.bind(this);
-  }
-
-  render() {
-    return (
-      <div>
-        <h3>TODO</h3>
-        <TodoList items={this.state.items} />
-        <form onSubmit={this.handleSubmit}>
-          <input
-            onChange={this.handleChange}
-            value={this.state.text}
-          />
-          <button>
-            Add #{this.state.items.length + 1}
-          </button>
-        </form>
-      </div>
-    );
-  }
-
-  handleChange(e) {
-    this.setState({ text: e.target.value });
-  }
-
-  handleSubmit(e) {
-    e.preventDefault();
-    if (!this.state.text.length) {
-      return;
-    }
-    const newItem = {
-      text: this.state.text,
-      id: Date.now()
-    };
-    this.setState(prevState => ({
-      items: prevState.items.concat(newItem),
-      text: ''
-    }));
-  }
-}
-
-class TodoList extends React.Component {
-  render() {
-    return (
-      <ul>
-        {this.props.items.map(item => (
-          <li key={item.id}>{item.text}</li>
-        ))}
-      </ul>
-    );
-  }
-}
-
-ReactDOM.render(<TodoApp />, mountNode);
-`.trim();
-
-var MARKDOWN_COMPONENT = `
-class MarkdownEditor extends React.Component {
-  constructor(props) {
-    super(props);
-    this.handleChange = this.handleChange.bind(this);
-    this.state = { value: 'Type some *markdown* here!' };
-  }
-
-  handleChange(e) {
-    this.setState({ value: e.target.value });
-  }
-
-  getRawMarkup() {
-    const md = new Remarkable();
-    return { __html: md.render(this.state.value) };
-  }
-
-  render() {
-    return (
-      <div className="MarkdownEditor">
-        <h3>Input</h3>
-        <textarea
-          onChange={this.handleChange}
-          defaultValue={this.state.value}
-        />
-        <h3>Output</h3>
-        <div
-          className="content"
-          dangerouslySetInnerHTML={this.getRawMarkup()}
-        />
-      </div>
-    );
-  }
-}
-
-ReactDOM.render(<MarkdownEditor />, mountNode);
-`.trim();