refactor: Use ES6 classes instead of createClass

src/components/app.js

@@ -1,8 +1,8 @@
 import React from 'react';
 import Navigation from './navigation';
+import PropTypes from 'prop-types';
 import Content from './content';
 import RoundedToggle from './rounded_toggle';
-import PureRenderMixin from 'react-pure-render/mixin';
 import GithubSlugger from 'github-slugger';
 import debounce from 'lodash.debounce';
 import { brandNames, brandClasses } from '../custom';
@@ -41,13 +41,13 @@ let debouncedReplaceState = debounce(hash => {
   window.history.replaceState('', '', hash);
 }, 100);
 
-var App = React.createClass({
-  mixins: [PureRenderMixin],
-  propTypes: {
-    content: React.PropTypes.string.isRequired,
-    ast: React.PropTypes.object.isRequired
-  },
-  getInitialState() {
+export default class App extends React.PureComponent {
+  static propTypes = {
+    content: PropTypes.string.isRequired,
+    ast: PropTypes.object.isRequired
+  }
+  constructor(props) {
+    super(props);
     var active = 'Introduction';
 
     if (process.browser) {
@@ -70,7 +70,7 @@ var App = React.createClass({
           active = headingForHash.children[0].value;
         }
       }
-      return {
+      this.state = {
         // media queryMatches
         mqls: mqls,
         // object of currently matched queries, like { desktop: true }
@@ -82,7 +82,7 @@ var App = React.createClass({
         showNav: false
       };
     } else {
-      return {
+      this.state = {
         mqls: { },
         queryMatches: {
           desktop: true
@@ -92,17 +92,17 @@ var App = React.createClass({
         showNav: false
       };
     }
-  },
+  }
   toggleNav() {
     this.setState({ showNav: !this.state.showNav });
-  },
+  }
   componentDidMount() {
     this.mediaQueryChanged();
     this.onScroll = debounce(this.onScrollImmediate, 100);
     document.addEventListener('scroll', this.onScroll);
     this.onScrollImmediate();
-  },
-  onScrollImmediate() {
+  }
+  onScrollImmediate = () => {
     var sections = document.querySelectorAll('div.section');
     if (!sections.length) return;
     for (var i = 0; i < sections.length; i++) {
@@ -114,7 +114,7 @@ var App = React.createClass({
         return;
       }
     }
-  },
+  }
   mediaQueryChanged() {
     this.setState({
       queryMatches: this.state.mqls.reduce((memo, q) => {
@@ -122,19 +122,19 @@ var App = React.createClass({
         return memo;
       }, {})
     });
-  },
+  }
   componentWillUnmount() {
     this.state.mqls.forEach(q => q.removeListener(this.mediaQueryChanged));
     document.body.removeEventListener('scroll', this.onScroll);
-  },
-  onChangeLanguage(language) {
+  }
+  onChangeLanguage = (language) => {
     this.setState({ language }, () => {
       if (window.history) {
         window.history.pushState(null, null,
           `?${qs.stringify({ language: language.title })}${window.location.hash}`);
       }
     });
-  },
+  }
   componentDidUpdate(_, prevState) {
     if (prevState.activeSection !== this.state.activeSection) {
       // when the section changes, replace the hash
@@ -144,7 +144,7 @@ var App = React.createClass({
       // when the language changes, use the hash to set scroll
       window.location.hash = window.location.hash;
     }
-  },
+  }
   navigationItemClicked(activeSection) {
     setTimeout(() => {
       this.setState({ activeSection });
@@ -152,12 +152,12 @@ var App = React.createClass({
     if (!this.state.queryMatches.desktop) {
       this.toggleNav();
     }
-  },
+  }
   toggleColumnMode() {
     this.setState({
       columnMode: this.state.columnMode === 1 ? 2 : 1
     });
-  },
+  }
   render() {
     let ast = JSON.parse(JSON.stringify(this.props.ast));
     let { activeSection, queryMatches, showNav, columnMode } = this.state;
@@ -237,6 +237,4 @@ var App = React.createClass({
 
     </div>);
   }
-});
-
-module.exports = App;
+}

src/components/content.js

@@ -1,14 +1,14 @@
 import React from 'react';
+import PropTypes from 'prop-types';
 import Section from './section';
-import PureRenderMixin from 'react-pure-render/mixin';
 import GithubSlugger from 'github-slugger';
 import { transformURL } from '../custom';
 let slugger = new GithubSlugger();
 let slug = title => { slugger.reset(); return slugger.slug(title); };
 
-var roundedToggleOptionType = React.PropTypes.shape({
-  title: React.PropTypes.string,
-  value: React.PropTypes.string
+var roundedToggleOptionType = PropTypes.shape({
+  title: PropTypes.string,
+  value: PropTypes.string
 });
 
 function chunkifyAST(ast, language) {
@@ -71,24 +71,21 @@ function chunkifyAST(ast, language) {
   });
 }
 
-var Content = React.createClass({
-  mixins: [PureRenderMixin],
-  propTypes: {
-    ast: React.PropTypes.object.isRequired,
+export default class Content extends React.PureComponent {
+  static propTypes = {
+    ast: PropTypes.object.isRequired,
     language: roundedToggleOptionType,
-    leftClassname: React.PropTypes.string.isRequired,
-    rightClassname: React.PropTypes.string.isRequired
-  },
+    leftClassname: PropTypes.string.isRequired,
+    rightClassname: PropTypes.string.isRequired
+  }
   render() {
     let { ast, language, leftClassname, rightClassname } = this.props;
     return (<div className='clearfix'>
-      {chunkifyAST(ast, language.value).map((chunk, i) => <Section
+      {chunkifyAST(ast, language.value).map((chunk, i) => (<Section
         leftClassname={leftClassname}
         rightClassname={rightClassname}
         chunk={chunk}
-        key={i} />)}
+        key={i} />))}
     </div>);
   }
-});
-
-module.exports = Content;
+}

src/components/navigation.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import PureRenderMixin from 'react-pure-render/mixin';
+import PropTypes from 'prop-types';
 import NavigationItem from './navigation_item';
 import { footerContent } from '../custom';
 
@@ -23,13 +23,12 @@ function getAllInSection(headings, idx) {
   return activeHeadings;
 }
 
-var Navigation = React.createClass({
-  mixins: [PureRenderMixin],
-  propTypes: {
-    ast: React.PropTypes.object.isRequired,
-    activeSection: React.PropTypes.string,
-    navigationItemClicked: React.PropTypes.func.isRequired
-  },
+export default class Navigation extends React.PureComponent {
+  static propTypes = {
+    ast: PropTypes.object.isRequired,
+    activeSection: PropTypes.string,
+    navigationItemClicked: PropTypes.func.isRequired
+  }
   render() {
     var activeHeadings = [];
     let headings = this.props.ast.children
@@ -91,6 +90,4 @@ var Navigation = React.createClass({
         {footerContent}
     </div>);
   }
-});
-
-module.exports = Navigation;
+}

src/components/navigation_item.js

@@ -1,17 +1,16 @@
 import React from 'react';
-import PureRenderMixin from 'react-pure-render/mixin';
+import PropTypes from 'prop-types';
 
-var NavigationItem = React.createClass({
-  mixins: [PureRenderMixin],
-  propTypes: {
-    sectionName: React.PropTypes.string.isRequired,
-    active: React.PropTypes.bool.isRequired,
-    onClick: React.PropTypes.func.isRequired,
-    href: React.PropTypes.string.isRequired
-  },
-  onClick() {
+export default class NavigationItem extends React.PureComponent {
+  static propTypes = {
+    sectionName: PropTypes.string.isRequired,
+    active: PropTypes.bool.isRequired,
+    onClick: PropTypes.func.isRequired,
+    href: PropTypes.string.isRequired
+  }
+  onClick = () => {
     this.props.onClick(this.props.sectionName);
-  },
+  }
   render() {
     var {sectionName, href, active} = this.props;
     return (<a
@@ -21,6 +20,4 @@ var NavigationItem = React.createClass({
       {sectionName}
     </a>);
   }
-});
-
-module.exports = NavigationItem;
+}

src/components/rounded_toggle.js

@@ -1,50 +1,46 @@
 import React from 'react';
-import PureRenderMixin from 'react-pure-render/mixin';
+import PropTypes from 'prop-types';
 
-var roundedToggleOptionType = React.PropTypes.shape({
-  title: React.PropTypes.string,
-  value: React.PropTypes.string
+var roundedToggleOptionType = PropTypes.shape({
+  title: PropTypes.string,
+  value: PropTypes.string
 });
 
-var RoundedToggle = React.createClass({
-  mixins: [PureRenderMixin],
-  propTypes: {
-    options: React.PropTypes.arrayOf(roundedToggleOptionType).isRequired,
+export default class RoundedToggle extends React.PureComponent {
+  static propTypes = {
+    options: PropTypes.arrayOf(roundedToggleOptionType).isRequired,
     active: roundedToggleOptionType,
-    short: React.PropTypes.bool,
-    onChange: React.PropTypes.func.isRequired
-  },
+    short: PropTypes.bool,
+    onChange: PropTypes.func.isRequired
+  }
   render() {
     let { options, active } = this.props;
     return (<div className='rounded-toggle inline short'>
       {options.map(option =>
-        <RoundedToggleOption
+        (<RoundedToggleOption
           key={option.value}
           option={option}
           short={this.props.short}
           onClick={this.props.onChange}
-          className={`strong ${option.value === active.value ? 'active': ''}`} />)}
+          className={`strong ${option.value === active.value ? 'active': ''}`} />))}
     </div>);
   }
-});
+}
 
-var RoundedToggleOption = React.createClass({
-  mixins: [PureRenderMixin],
-  propTypes: {
+class RoundedToggleOption extends React.PureComponent {
+  static propTypes = {
     option: roundedToggleOptionType,
-    className: React.PropTypes.string.isRequired,
-    short: React.PropTypes.bool,
-    onClick: React.PropTypes.func.isRequired
-  },
-  onClick() {
+    className: PropTypes.string.isRequired,
+    short: PropTypes.bool,
+    onClick: PropTypes.func.isRequired
+  }
+  onClick = () => {
     this.props.onClick(this.props.option);
-  },
+  }
   render() {
     let { className, option } = this.props;
     return (<a
       onClick={this.onClick}
       className={className}>{this.props.short ? option.short : option.title}</a>);
   }
-});
-
-module.exports = RoundedToggle;
+}

src/components/section.js

@@ -1,8 +1,8 @@
 import React from 'react';
 import remark from 'remark';
+import PropTypes from 'prop-types';
 import remarkHTML from 'remark-html';
 import remarkHighlight from '../highlight';
-import PureRenderMixin from 'react-pure-render/mixin';
 import { postHighlight, remarkPlugins } from '../custom';
 
 function renderHighlighted(nodes) {
@@ -19,13 +19,12 @@ function renderHighlighted(nodes) {
   };
 }
 
-var Section = React.createClass({
-  mixins: [PureRenderMixin],
-  propTypes: {
-    chunk: React.PropTypes.object.isRequired,
-    leftClassname: React.PropTypes.string.isRequired,
-    rightClassname: React.PropTypes.string.isRequired
-  },
+export default class Section extends React.PureComponent {
+  static propTypes = {
+    chunk: PropTypes.object.isRequired,
+    leftClassname: PropTypes.string.isRequired,
+    rightClassname: PropTypes.string.isRequired
+  }
   render() {
     let { chunk, leftClassname, rightClassname } = this.props;
     let { left, right, preview } = chunk;
@@ -40,6 +39,4 @@ var Section = React.createClass({
         dangerouslySetInnerHTML={renderHighlighted(right)} />}
     </div>);
   }
-});
-
-module.exports = Section;
+}