Building Stellar User Experiences with React Native

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Alex Kotliarskyi Building Stellar User Experiences with React Native

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How do you know ☕ is good?

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☕

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☕

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Expectations

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Expectations iOS Android Desktop Web Mobile Web Windows Linux

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Mobile apps have higher  UX expectations level than Web apps

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Expectations change

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iOS Developer Web Developer React ❤ React Native Core Team (3 years) Building apps with RN (F8, Oculus) Alex Kotliarskyi @alex_frantic

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UIScrollView  iOS android.widget.ScrollView Android

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"React Native made me 10x more productive"

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Android RN iOS time

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10% is not done

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Building for is diﬀerent

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✨

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Text Input Direct Manipulation Animation and Spatial Awareness Loading State UI Library ....

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It's all simple things

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...but not very obvious

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Text Input Direct Manipulation Animation and Spatial Awareness Loading State UI Library

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this.setState({email})}   />  

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10% time 100% done

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Dismissing keyboard Autofocus Placeholders Space under keyboard Spell checking and auto-capitalization Keyboard type Custom return key

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this.setState({email})} keyboardAppearance="light" placeholder="name@example.com" autoFocus={true} autoCapitalize="none" autoCorrect={false} keyboardType="email-address" returnKeyType="next" onSubmitEditing={this._focusNext} blurOnSubmit={false} />  

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this.setState({email})}   />  

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Text Input Direct Manipulation Animation and Spatial Awareness Loading State UI Library

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Direct  manipulation

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Direct Manipulation Instant Feedback Physics Touch Targets Ability to Cancel

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✍

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https://webkit.org/blog/5610/more-responsive-tapping-on-ios/

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Direct Manipulation Instant Feedback Physics Touch Targets Ability to Cancel

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Animated.decay() Animated.timing() Animated.spring() https://github.com/wix/react-native-interactable

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Animated.spring(value, {   ...   useNativeDriver: true,   }).start();  

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InteractionManager

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Direct Manipulation Instant Feedback Physics Touch Targets Ability to Cancel

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https://material.io/guidelines/usability/accessibility.html#accessibility-style

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Direct Manipulation Instant Feedback Physics Touch Targets Ability to Cancel

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Button Cancelled

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Text Input Direct Manipulation Animation and Spatial Awareness Loading State UI Library

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Animation not a luxury

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Animation a tool

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iOS Android

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Text Input Direct Manipulation Animation and Spatial Awareness Loading State UI Library

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Most of web  is about pages of content

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class TaskDetails extends React.Component {   props: { id: string };   state = { data: null };     componentDidMount() {   fetch(`/tasks?id=${this.props.id}`)   .then(response => response.json())   .then(data => this.setState({data}));   }     render() {   if (!this.state.data) {   return   } else {   return (   ...   );   }   }   }  

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class TaskDetails extends React.Component {   props: { id: string, data: ?Object };   state = { data: null };     componentDidMount() {   fetch(`/tasks?id=${this.props.id}`)   .then(response => response.json())   .then(data => this.setState({data}));   }     render() {   const data = this.state.data || this.props.data;   return (   ...   );   }   }  

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class TaskListItem extends React.Component {   render() {   return (   ...     ...     ...   );   }   }   500ms

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DX → UX

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MobX Relay

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It Does Not Matter!

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Go beyond what frameworks provide

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Text Input Direct Manipulation Animation and Spatial Awareness Loading State UI Library

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"Building with React Native is so easy,  we don't need standard components" – Developer

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Button

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function Button(props) {   return (       {props.caption}       );   }  

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10% time 100% done

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Cross platform Disabled state Icon Fixed height Text wrapping Accessibility Consistency

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Build your own standard controls

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Button ✨ ✨

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Text Input Direct Manipulation Animation and Spatial Awareness Loading State UI Library

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Experience it on a real device Animation and gestures are essential tools Go beyond what frameworks provide