class App extends React.Component { state = { month: '三月', day: '28', once: '学习React', twice: '40分钟' } render () { return ( <div className="one"> <div className="two"> <div className="date"> <div className="month">{this.state.month}</div> <div className="day">{this.state.day}</div> </div> <div className="content"> <div className="once">{this.state.once}</div> <br/> <div className="twice">{this.state.twice}</div> </div> </div> </div> ) } } ReactDOM.render(<App />, document.getElementById('root'))
时间: 2023-06-12 20:04:16 浏览: 56
这是一个 React 组件,它会在页面上渲染一个日历和待办事项列表。组件中的 state 包含了月份、日期、一次性任务和二次性任务。在 render 方法中,通过 JSX 语法将这些数据渲染到了页面上。其中,className 用于指定样式类名,div 标签用于表示页面上的元素。最后,通过 ReactDOM.render 方法将组件渲染到了页面上。
相关问题
帮我用react+antdesign实现一个表格嵌套两层表格的效果,以class MonitorList extends React.Component命名
好的,以下是一个简单的实现示例:
```javascript
import React from 'react';
import { Table } from 'antd';
class MonitorList extends React.Component {
state = {
dataSource: [
{
key: '1',
name: 'John Brown',
age: 32,
address: 'New York No. 1 Lake Park',
children: [
{
key: '11',
name: 'John Brown Jr.',
age: 18,
address: 'New York No. 2 Lake Park',
},
{
key: '12',
name: 'John Brown Sr.',
age: 45,
address: 'New York No. 3 Lake Park',
children: [
{
key: '121',
name: 'John Brown',
age: 18,
address: 'New York No. 3 Lake Park',
},
{
key: '122',
name: 'Mike Brown',
age: 25,
address: 'New York No. 4 Lake Park',
},
],
},
],
},
{
key: '2',
name: 'Jim Green',
age: 42,
address: 'London No. 1 Lake Park',
children: [
{
key: '21',
name: 'Jim Green Jr.',
age: 18,
address: 'London No. 2 Lake Park',
},
{
key: '22',
name: 'Jimmy Green Sr.',
age: 45,
address: 'London No. 3 Lake Park',
children: [
{
key: '221',
name: 'Jim Green',
age: 18,
address: 'London No. 3 Lake Park',
},
{
key: '222',
name: 'Jenny Green',
age: 25,
address: 'London No. 4 Lake Park',
},
],
},
],
},
],
columns: [
{
title: 'Name',
dataIndex: 'name',
key: 'name',
},
{
title: 'Age',
dataIndex: 'age',
key: 'age',
},
{
title: 'Address',
dataIndex: 'address',
key: 'address',
},
],
};
render() {
const { dataSource, columns } = this.state;
const renderNestedTable = (record) => {
const nestedColumns = [
{
title: 'Name',
dataIndex: 'name',
key: 'name',
},
{
title: 'Age',
dataIndex: 'age',
key: 'age',
},
{
title: 'Address',
dataIndex: 'address',
key: 'address',
},
];
return (
<Table
columns={nestedColumns}
dataSource={record.children}
pagination={false}
size="small"
/>
);
};
return (
<Table
columns={columns}
dataSource={dataSource}
expandedRowRender={renderNestedTable}
/>
);
}
}
export default MonitorList;
```
这个示例使用了Ant Design的Table组件实现了一个表格嵌套两层表格的效果。其中,外层表格的数据源为一个包含嵌套子数据的数组,内层表格的数据源则为嵌套子数据的`children`字段,通过在外层表格中设置`expandedRowRender`属性为一个函数,可以在每一行展开时自动渲染内层表格。
使用react的hooks怎么改写下面这段代码:class APP extends React.Component { constructor(props) { super(props); this.player = null } componentDidMount(){ var asse = '1', player=new EZUIKit.EZUIKitPlayer({width:600}) window.player = this.player; } fullScreent=()=>{ this.player.fullScreent(); } render(){ return ( <div> <button onClick={()=> this.fullScreent()}>开始</button> <div> ) } } export default APP;
使用React的Hooks,你可以将上面的代码改写为函数组件。下面是改写后的代码:
```jsx
import React, { useEffect, useRef } from 'react';
import EZUIKit from 'ezuikit-js';
function APP() {
const playerRef = useRef(null);
useEffect(() => {
const player = new EZUIKit.EZUIKitPlayer({ width: 600 });
playerRef.current = player;
window.player = playerRef.current;
}, []);
const fullScreent = () => {
playerRef.current.fullScreent();
};
return (
<div>
<button onClick={fullScreent}>开始</button>
<div></div>
</div>
);
}
export default APP;
```
在函数组件中,我们使用了`useRef`来创建一个引用`playerRef`,它将被用于保存`player`实例的引用。在`useEffect`钩子中,我们创建了一个名为player的EZUIKitPlayer实例,并将其赋值给playerRef.current和window.player。`fullScreent`函数用于触发全屏播放,我们仍然使用`playerRef.current`来调用它。按钮的点击事件直接绑定到`fullScreent`函数上。