componentDidMount(){document.getElementById('btn-reactandnative').addEventListener('click',(e)=>{console.log('原生+react 事件: 原生事件执行');});}handleNativeAndReact=(e)=>{console.log('原生+react 事件: 当前执行react事件');}handleClick=(e)=>{console.log('button click');}render(){ret...
render() { return ( <React.Fragment> <Button intent="default">默认按钮</Button> <Button intent="primary">主要按钮</Button> <Button intent="success">成功按钮</Button> <Button intent="info">信息按钮</Button> <Button intent="warning">警告按钮</Button> <Button intent="danger">危险按钮</B...
第一种情况:不传参,执行1+n次,初始化调用一次,监听所有的state,有任何一个发生改变,都会再次执行一次(有点像render(1+n);也有人说像componentDidUpdate,但是这个钩子初始化不执行,状态发生变化时才会执行(n))不传参的情况在实际开发中较少见,要么传个[],要么传个数组里面监听状态 第二种情况:传 [],不监测...
Component<any, any> | PublicInstance | null { // 获取 rootFiber const containerFiber = container.current; // 如果 rootFiber 没有子元素 // 指的就是 id="root" 的 div 没有子元素 if (!containerFiber.child) { // 返回 null return null; } // 匹配子元素的类型 switch (containerFiber.chil...
我们分析diff算法是从reconcileChildren开始的,之前从setState -> enqueueSetState(UpdateQueue) -> scheduleUpdate -> performWork -> workLoop -> beginWork -> finishClassComponent -> reconcileChildren相关的部分就不过多介绍了,需要注意的是beginWork会将一个一个的Fiber来进行diff,期间是可中断的,因为每次执行下...
( currentTime, current, suspenseConfig, ); // 设置FiberRoot.context, 首次执行返回一个emptyContext, 是一个 {} const context = getContextForSubtree(parentComponent); // 初始渲染时 Fiber Root 对象中的 context 属性值为 null // 所以会进入到 if 中 if (container.context === null) { // 初始...
I'm sure this does not appear in the issue list of the repository Basic Info What are the similar cases of this feature Sandbox What problem does this feature solve? Cannot Split by children wrapper by React.Fragment
class SearchBar extends Component { constructor(props) { super(props); this.txtSearch = null; this.state = { term: '' }; this.setInputSearchRef = e => { this.txtSearch = e; } } onInputChange(event) { this.setState({ term: this.txtSearch.value }); } render() { return ( )...
if (returnFiber.lastEffect !== null) { returnFiber.lastEffect.nextEffect = completedWork; } else { returnFiber.firstEffect = completedWork; } returnFiber.lastEffect = completedWork; } } } else { // This fiber did not complete because something threw. Pop values off ...
// 如果你要用 state refs, 最好用 class extends React.Component 而不是 React.createClass "react/prefer-stateless-function": 2, // 将多行的JSX标签写在 ()里 "react/jsx-wrap-multilines": 2, // 禁止xml tag has empty body "react/self-closing-comp": [ ...