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No content
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http://facebook.github.io/react/blog/2015/03/10/react-v0.13.html
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2013 2014 2015 2016
Flux
v0.13
ReactNative
for iOS
GraphQL
Redux Relay
React Native
for Android
v0.14
React Native
for Windows
v15.0.0
…
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const Item = ({item}) => (
);
//
{item.name}×{item.count}
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↪︎&4$MBTTFT$PNQPOFOUT
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class Counter extends React.Component {
constructor(…args) {
super(…args);
this.state = {
count: 0
};
this.onClick = this.onClick.bind(this);
}
onClick() {
this.setState({
count: this.state.count + 1
});
}
render() {
return (
++
);
}
{this.state.count}
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import shallowCompare from ‘react-addons-shallow-compare’;
const pure = Component => class PureComponent extends React.Component {
shouldComponentUpdate(nextProps, nextState) {
return shallowCompare(this, nextProps, nextState);
}
render () {
return
}
};
const Item = ({item}) =>
{item.name}×{item.count}
;
const PureItem = pure(Item);
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class Button extends React.Component {
onClick = () => this.setState({count: this.state.count + 1});
}
Stage1
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WIP
PureComponent was merged as #7195.
It’s a PureRenderMixin for ES Classes.
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class Post extends React.PureComponent { // or React.Component
render() {
return (
);
}
}
function PostHeader(props) {
// ...
}
function PostBody(props) {
// ...
}
Pure
Pure
This wasn’t merged
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"QJUGBMMPGTIPVME$PNQPOFOU6QEBUF
import shallowCompare from ‘react-addons-shallow-compare’;
class Item extends React.Component {
shouldComponentUpdate(nextProps, nextState) {
return shallowCompare(this, nextProps, nextState);
}
render() {
return (
);
}
}
console.log(‘click’)} />
{this.props.name}
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import Perf from ‘react-addons-perf’;
Perf.start();
ReactDOM.render(, el);
setTimeout(() => {
ReactDOM.render(, el);
Perf.stop();
Perf.printWasted();
}, 1000);
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import React from ‘react’;
import {whyDidYouUpdate} from 'why-did-you-update';
whyDidYouUpdate(React); // monkey patches for React
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onClick() {
this.setState((state, props) => ({count: state.count + 1}));
this.setState((state, props) => ({count: state.count + 1}));
}
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onClick() {
fetch(API_URL)
.then(res => res.json())
.then(json => {
this.setState({user: json.user});
// …
this.setState({completed: true});
});
}
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onClick() {
fetch(API_URL)
.then(res => res.json())
.then(json => {
ReactDOM.unstable_batchedUpdates(() => {
this.setState({user: json.user});
// …
this.setState({completed: true});
});
});
}
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//
Hello {name}
Hello
React
Hello
React
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render() {
let text;
return (
c && c.focus()} />
text = c} />
);
}
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const Item = ({item}, {settings}) => (
{item.name}
);
Item.contextTypes = {
settings: React.PropTypes.object
};
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const shallowRenderer = TestUtils.createRenderer();
const elementTree = shallowRenderer.render();
assert(elementTree.props.children[0].type === ‘div’);
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import {shallow} from ‘enzyme’;
const wrapper = shallow();
assert(wrapper.find(Link).prop(‘to’) === ‘/foo’);
wrapper.find(‘button’).simulate(‘click’);
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core-notes
May 05.
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import React, {Component} from 'react';
import {TabBarIOS, NavigatorIOS} from ‘react-native’;
class App extends Component {
render() {
return (
);
}
}
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(facebook/react)
src
!"" isomorphic
# !"" children
# !"" classic
# $"" modern
!"" renderers
# !"" art
# !"" dom
# # !"" client
# # !"" server
# # $"" shared
# !"" native
# !"" noop
# $"" shared
!"" shared
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w "NJOJNVNJNQMFNFOUBUJPOPG3FBDU3FOEFSFS
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<8*1>/FX3FDPODJMFS
// src/renderers/noop/ReactNoop.js
var NoopRenderer = ReactFiberReconciler({
createHostInstance() {
},
scheduleHighPriCallback(callback) {
scheduledHighPriCallback = callback;
},
scheduleLowPriCallback(callback) {
scheduledLowPriCallback = callback;
},
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function Continuation({ isSame }) {
return {isSame ? 'foo==bar' : 'foo!=bar'};
}
function Child({ bar }) {
return ReactCoroutine.createYield({
bar: bar,
}, Continuation, null);
}
function Indirection() {
return [, ];
}
function HandleYields(props, yields) {
return yields.map(y =>
);
}
function Parent(props) {
return ReactCoroutine.createCoroutine(
props.children,
HandleYields,
props
);
}
function App() {
return ;
}
ReactNoop.render();
ReactNoop.flush();
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