Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel includes JSX processing.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <div id="app"></div>
              
            
!

CSS

              
                .app {
  padding: 2em 0;
  font-family: Helvetica, Arial, sans-serif;
}

.app h1 {
  padding: 0.2em 1em 0.7em 1em;
  font-size: 2em;
}

.app h2 {
  padding: 0.2em 0 0.7em 0;
  font-size: 1.6em;
}

.app h3 {
  padding: 0.2em 0 0.7em 0;
  font-size: 1.2em;
}

.content {
  padding: 2em;
}

.content pre {
  margin-top: 0.5em;
  font-family: Monospaced, monospace;
}

.content section {
  margin: 1em 0;
}

.header {
  display: flex;
  height: 44px;
  background: #06c;
  justify-content: space-between;
}

.nav {
  margin-left: 36px;
  line-height: 2em;
  flex: 1;
}

.nav ul {
  list-style: none;
}

.nav li {
  display: inline-block;
}

.tab {
  display: inline-block;
  margin-top: 9px;
  margin-right: 5px;
  padding: 0 2em;
  height: 36px;
  border-radius: 5px 5px 0 0;
  color: #fff;
  text-decoration: none;
  transition: background-color 200ms;

}

.tab:hover:not([data-active="true"]) {
  background-color: rgba(255, 255, 255, 0.2);
}

.tab[data-active="true"] {
  background-color: #fff;
  color: #06c;
}

.github {
  float: right;
}

.link {
  padding: 0.5em 1em;
  color: #06c;
}

.link[data-active="true"] {
  border: 1px solid #06c;
}

.sorting {
  padding: 0.5em 1em;
  color: #06c;
}

.sorting[data-active="true"] {
  color: red;
}

              
            
!

JS

              
                const {locationHistory, locationHash, actions, href, isActive, componentRouter} = ComponentRouter;
const {createStore, combineReducers} = Redux;


const store = createStore(combineReducers({componentRouter}));
locationHash({store, namespace: 'componentRouter'});


const navigateTo = params => event => {
  event.preventDefault();
  store.dispatch(actions.navigateTo(params));
};


const GlobalLinks = ({routingState}) => (
  <ul>
    <li>
      <a
        className="tab"
        data-active={isActive(routingState, {pathname: '/'})}
        href={href(routingState, {pathname: '/'})}
        onClick={navigateTo({pathname: '/'})}>Home</a>
    </li>
    <li>
      <a
        className="tab"
        data-active={isActive(routingState, {pathname: '/foo'})}
        href={href(routingState, {pathname: '/foo'})}
        onClick={navigateTo({pathname: '/foo'})}>/foo</a>
    </li>
    <li>
      <a
        className="tab"
        data-active={isActive(routingState, {pathname: '/bar'})}
        href={href(routingState, {pathname: '/bar'})}
        onClick={navigateTo({pathname: '/bar'})}>/bar</a>
    </li>
    <li>
      <a
        className="tab"
        data-active={isActive(routingState, {pathname: '/cleanHistory'})}
        href={href(routingState, {pathname: '/cleanHistory'})}
        onClick={navigateTo({pathname: '/cleanHistory'})}>/cleanHistory</a>
    </li>
    <li>
      <a
        className="tab"
        data-active={isActive(routingState, {pathname: '/404'})}
        href={href(routingState, {pathname: '/404'})}
        onClick={navigateTo({pathname: '/404'})}>/404</a>
    </li>
  </ul>
);
GlobalLinks.propTypes = {
  routingState: PropTypes.object.isRequired
};


class ComponentLinks extends React.Component {
  static propTypes = {
    routingState: PropTypes.object.isRequired
  };


  componentWillMount() {
    store.dispatch(actions.addDefaultParam('component', 'baz'));
  }


  componentWillUnmount() {
    store.dispatch(actions.removeParam('component'));
  }


  render() {
    const {routingState} = this.props;

    return (
      <span>
        <a
          className="link"
          data-active={isActive(routingState, {query: {component: 'bla'}})}
          href={href(routingState, {query: {component: 'bla'}})}
          onClick={navigateTo({query: {component: 'bla'}})}>component: bla</a>
        <a
          className="link"
          data-active={isActive(routingState, {query: {component: 'baz'}})}
          href={href(routingState, {query: {component: 'baz'}})}
          onClick={navigateTo({query: {component: 'baz'}})}>component: baz</a>
      </span>

    );
  }
}


class SortedComponentLinks extends React.Component {
  static propTypes = {
    routingState: PropTypes.object.isRequired
  };


  componentWillMount() {
    store.dispatch(actions.addDefaultParam('offRecord', 'bla'));
    store.dispatch(actions.addOffRecordParam('offRecord'));
  }


  componentWillUnmount() {
    store.dispatch(actions.removeParam('offRecord'));
  }


  render() {
    const {routingState} = this.props;

    return (
      <div>
        <h3>Changes are going to replace browser history</h3>
        <div>
          {['bla', 'baz', 'abc', 'zyx'].map(item => (
            <a
              className="link"
              data-active={isActive(routingState, {query: {offRecord: item}})}
              href={href(routingState, {query: {offRecord: item}})}
              key={item}
              onClick={navigateTo({query: {offRecord: item}})}>
              off-record: {item}
            </a>
          ))}
        </div>
      </div>
    );
  }
}


const Header = props => (
  <header className="header">
    <nav className="nav">
      <GlobalLinks {...props} />
    </nav>
  </header>
);


const Foo = props => (
  <div className="content">
    <h1>Foo</h1>
    <section>
      <ComponentLinks {...props} />
    </section>
  </div>
);


const Bar = () => (
  <div className="content">
    <h1>Bar</h1>
  </div>
);


const CleanHistory = props => (
  <div className="content">
    <h1>CleanHistory</h1>
    <section>
      <SortedComponentLinks {...props} />
    </section>
  </div>
);


const Home = () => (
  <div className="content">
    <h1>Home</h1>
  </div>
);


const NotFound = () => (
  <div className="content">
    <h1>Not Found</h1>
  </div>
);


const routes = {
  '/': Home,
  '/foo': Foo,
  '/bar': Bar,
  '/cleanHistory': CleanHistory
};


// Add routes
Object.keys(routes).forEach(route => store.dispatch(actions.addRoute(route)));


class App extends React.Component {
  state = {
    routingState: store.getState().componentRouter
  };


  componentWillMount() {
    this.unsubscribe = store.subscribe(() =>
      this.setState({routingState: store.getState().componentRouter}));
  }


  componentWillUnmount() {
    this.unsubscribe();
  }


  render() {
    const {routingState} = this.state;
    const CurrentComponent = routes[routingState.currentRoute.route] || NotFound;

    return (
      <div className="app">
        <h1>component-router</h1>
        <Header routingState={routingState} />
        <CurrentComponent routingState={routingState} />
        <section className="content">
          Routing state:
          <pre>{JSON.stringify(routingState, null, 2)}</pre>
        </section>
      </div>
    );
  }
}


ReactDOM.render(<App />, document.querySelector('#app'));

              
            
!
999px

Console