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Dive into React.js
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koba04
February 15, 2015
Programming
10
3.3k
Dive into React.js
歌舞伎座.tech#6「VirtualDOMとReact」での発表資料です。
http://kbkz.connpass.com/event/11254/
koba04
February 15, 2015
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Transcript
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https://www.facebook.com/
http://instagram.com/
http://instagram.com/
https://speakerdeck.com/mridgway/isomorphic-flux
None
http://facebook.github.io/react/docs/videos.html
https://developer.atlassian.com/blog/2015/02/rebuilding-hipchat-with-react/
https://vivaldi.com/
http://techblog.netflix.com/2015/01/netflix-likes-react.html
3FBDUXPSLTXJUIPVUUIF%0. https://github.com/reactjs/react-art/blob/master/src/ReactART.js
http://engineering.flipboard.com/2015/02/mobile-web/
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{ return <div>Hello {this.props.name}</div>; } }); React.render(<Hello name=“kbkz” />, document.body); // <div>Hello kbkz</div>
&4$MBTT WCFUB class Hello extends React.Component { render() { return
<div>Hello {this.props.name}</div>; } } React.render(<Hello name=“kbkz” />, document.body); // <div>Hello kbkz</div>
$PNQPOFOU &MFNFOU ReactComponentClass = React.createClass({ render(){} }); ReactCompositeComponent = React.render(<ReactComponentClass
/>, document); ReactCompositeComponent.setState({}); ReactDOMComponent = React.render(<div />, document); ReactDOMComponent.setState({}); // Uncaught TypeError: undefined is not a function ReactElement = React.createElement(ReactComponentClass, null); // ReactElement has type, props(children), key, ref.
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React.createClass({ render() { var foods = [‘sushi’, ‘ramen’, ‘pizza’].map( food => { return <Food name={food} /> }); return <div>{foods}</div>; } var Food = React.createClass({ render() { return <ul><li>{this.props.name}</li></ul> } }); ͜ͷσʔλ Foodsͷͷ
1SPQJTB4QFD w ֎෦ͱͷ*'༷ͱͳΔɻ w 1SPQ5ZQFTͰ໌֬ʹఆٛ͢Δɻ var Food = React.createClass({ propTypes:
{ name: React.PropTypes.string.isRequired }, render() { return <ul><li>{this.props.name}</li></ul> } }); จࣈྻͰඞਢ
1SPQ5ZQFT React.PropTypes.array // ྻ React.PropTypes.bool.isRequired // BooleanͰඞਢ React.PropTypes.func //
ؔ React.PropTypes.number // React.PropTypes.object // ΦϒδΣΫτ React.PropTypes.string // จࣈྻ React.PropTypes.node // RenderͰ͖Δͷ React.PropTypes.element.isRequired // React ElementͰඞਢ React.PropTypes.instanceOf(XXX) // XXXͷinstance͔Ͳ͏͔
1SPQ5ZQFT React.PropTypes.oneOf(['foo', 'bar']) // foo͔bar React.PropTypes.oneOfType([React.PropTypes.string, React.PropTypes.array]) // จࣈྻ͔ྻ
React.PropTypes.arrayOf(React.PropTypes.string) // จࣈྻͷྻ͔Ͳ͏͔ React.PropTypes.objectOf(React.PropTypes.string) // จࣈྻͷΛ͍࣋ͬͯΔ͔ React.PropTypes.shape({ // ࢦఆ͞ΕͨܗࣜΛຬ͍ͨͯ͠Δ͔ color: React.PropTypes.string, fontSize: React.PropTypes.number }); React.PropTypes.any.isRequired // ͳΜͰ͍͍͚Ͳඞਢ // ΧελϜͷ੍ఆٛग़དྷΔ(μϝͳ߹Error͛Δ) customPropType: function(props, propName, componentName) { if (!/^[0-9]/.test(props[propName])) { return new Error('Validation failed!'); } }
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{ return { count: 0 }; }, onClick() { this.setState({ count: this.state.count + 1}); }, render() { return ( <div> <span>{this.state.count}</span> <button onClick={this.onClick}>click</button> </div> ); } });
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4QSFBE"UUSJCVUFT <div className=“container”>{this.props.name}</div> ! React.createElement("div", {className: "container"}, this.props.name); <User {...this.props} type=“user”} />
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}); } onClick(e) { e.preventDefault(); } render() { return ( <div> <input type=“text” onChange={this.onChange} />; <a onClick={this.onClick}>no longer</a> </div> ); } Autobinding Not support in Class syntax
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preventDefault; beforeEach(() => { inputArtist = React.addons.TestUtils.renderIntoDocument(<InputArtist />); preventDefault = jest.genMockFunction(); inputArtist.setState({ inputArtist: 'travis' }); React.addons.TestUtils.Simulate.submit(inputArtist.getDOMNode(), { preventDefault: preventDefault }); }); it ("calls fetchByArtist with state.inputArtist", () => { expect(AppTracksActionCreators.fetchByArtist).toBeCalled(); expect(AppTracksActionCreators.fetchByArtist).toBeCalledWith('travis'); }); it ("calls e.preventDefault", () => { expect(preventDefault).toBeCalled(); });
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<Route name="top" handler={App} path="/"> <Route name="artist" handler={Artist} /> <Route name="country" handler={Country} /> <DefaultRoute handler={Top} /> </Route> ); Router.run(routes, Router.HistoryLocation, (Handler) => { React.render(<Handler />, document); });
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ੜͨ͠HTMLΛinnerHTML্ͯ͠ॻ͖ͯ͠DOMΛ࠶ߏங͢Δ
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‘object-assign’; import AppConstants = from ‘../constants/AppConstants’; ; let PayloadSources = AppConstants.PayloadSources; export default assign(new Dispatcher(), { handleViewAction: function(action) { this.dispatch({ source: PayloadSources.VIEW_ACTION, action: action }); } });
4UPSF let tracks = []; let TrackStore = assign({}, EventEmitter.prototype,
{ emitChange: function() { this.emit(CHANGE_EVENT); }, addChangeListener: function(callback) { this.on(CHANGE_EVENT, callback); }, removeChangeListener: function(callback) { this.removeListener(CHANGE_EVENT, callback); }, getAll: function() { return tracks; }, }); TrackStore.dispatchToken = AppDispatcher.register(function(payload) { let action = payload.action; switch (action.type) { case ActionTypes.RECEIVE_TRACKS_BY_ARTIST: tracks = action.tracks; TrackStore.emitChange(); break;
"DUJPO$SFBUPST export default { fetchByArtist: function(artist) { request.get( `url${encodeURIComponent(artist)}`, (res)
=> { AppDispatcher.handleViewAction({ type: ActionTypes.RECEIVE_TRACKS_BY_ARTIST, tracks: res.body.toptracks.track }); } ); }, }
7JFX export default React.createClass({ getInitialState() { return { tracks: TrackStore.getAll(),
}; }, componentDidMount: function() { TrackStore.addChangeListener(this._onChange); }, componentWillUnmount: function() { TrackStore.removeChangeListener(this._onChange); }, _onChange: function() { this.setState({ tracks: TrackStore.getAll() }); }, handleSubmit(e) { e.preventDefault(); let artist = this.state.inputArtist; if (artist) AppTracksActionCreators.fetchByArtist(artist); }, });
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