記錄一次完整的react hooks實(shí)踐

import React from 'react';
import { Tabs, Input, RangeTime, Button, Table } from './components';

class App extends React.Component {
 ...
 state = {
 type: [],
 id: '',
 title: '',
 date: [],
 dataList: []
 }
 componentDidMount() {
 this.fetchData();
 }
 render() {
 <Tabs value={this.state.type} onChange={this.handleTypeChange}/>
 <Input value={this.state.id} label="ID" onChange={this.handleIdChange}/>
 <Input value={this.state.id} label="標(biāo)題" onChange={this.handleTitleChange}/>
 <RangeTime value={this.state.date} onChange={this.handleRangeTimeChange}/>
 <Button onClick={this.handleQueryBtnClick}>查詢(xún)</Button>
 <Table dataList={this.state.dataList} />
 }
 
 fetchData() {
 ...
 this.setState({
 dataList
 });
 }

 handleTypeChange() {
 ...
 this.setState({
 type,
 });
 }
 
 handleIdChange() {
 ...
 this.setState({
 id,
 });
 }

 handleTitleChange() {
 ...
 this.setState({
 title,
 });
 }

 handleRangeTimeChange() {
 ...
 this.setState({
 date,
 });
 }

 handleQueryBtnClick() {
 ...
 }
 ...
}

import React, { useState, useEffect} from 'react';
import { Tabs, Input, RangeTime, Button, Table } from './components';

const App = () => {
 // 數(shù)據(jù)類(lèi)型
 const tabs = [{ key: 1, value: '類(lèi)型1' }, { key: 0, value: '類(lèi)型2' }];
 const [tab, setTab] = useState(1);
 // 數(shù)據(jù)ID
 const [dataId, setDataid] = useState('');
 // 標(biāo)題
 const [title, setTitle] = useState('');
 // 時(shí)間區(qū)間, 默認(rèn)為至今一周時(shí)間
 const now = Date.now();
 const [timeRange, setTimeRange] = useState([now - 1000 * 60 * 60 * 24 * 7, now]);
 // 數(shù)據(jù)列表
 const [dataList, setDataList] = useState([]);

 // 點(diǎn)擊搜索按鈕
 function handleBtnClick() {
 // 請(qǐng)求數(shù)據(jù)
 ...
 }

 return <section className="app">
 <Title title="數(shù)據(jù)查詢(xún)" />
 <Tabs label="類(lèi)型" tabs={tabs} tab={tab} onChange={setTab} />
 <Input value={dataId} placeholder="請(qǐng)輸入數(shù)據(jù)ID" onChange={setDataid}>ID</Input>
 <Input value={title} placeholder="請(qǐng)輸入數(shù)據(jù)標(biāo)題" onChange={setTitle}>標(biāo)題</Input>
 <TimeRange label="數(shù)據(jù)時(shí)間" value={timeRange} onChange={handleTimeChange}/>
 <article className="btn-container">
 <Button type="primary" onClick={handleBtnClick}>
 查詢(xún) 
 </Button>
 </article>
 <Table dataList={dataList}></Table>
 </section>
};

import React, { useState, useEffect } from 'react';
import jsonp from '../tools/jsonp';


function MyFecth(url) {
 // 是否正在請(qǐng)求中
 const [isLoading, setIsLoanding] = useState(false);
 // 請(qǐng)求參數(shù)
 const [queryParams, setQueryParams] = useState(null);
 // 請(qǐng)求結(jié)果
 const [data, setData] = useState(null);

 // 向接口發(fā)起請(qǐng)求
 const fetchData = async () => {
 if(queryParams === null) {
 return;
 }
 setIsLoanding(true);
 const res = await jsonp({
 url: url,
 data: queryParams
 });
 setData(res);
 setIsLoanding(false);
 }

 // 只要queryParams改變，就發(fā)起請(qǐng)求
 useEffect(()=> {
 fetchData();
 }, [queryParams]);


 // 供外部調(diào)用
 const doGet = (params) => {
 setQueryParams(params);
 }

 return {
 isLoading,
 data,
 doGet
 }
}

export default MyFecth;

import React, { useState, useEffect} from 'react';
import { Tabs, Input, RangeTime, Button, Table } from './components';
import MyFecth from './MyFetch';

const App = () => {

 // ①使用數(shù)據(jù)請(qǐng)求hooks
 const { isLoading, data, doGet } = MyFecth('http://xxx');
 
 // 數(shù)據(jù)類(lèi)型
 const tabs = [{ key: 1, value: '類(lèi)型1' }, { key: 0, value: '類(lèi)型2' }];
 const [tab, setTab] = useState(1);
 // 數(shù)據(jù)ID
 const [dataId, setDataid] = useState('');
 // 標(biāo)題
 const [title, setTitle] = useState('');
 // 時(shí)間區(qū)間, 默認(rèn)為至今一周時(shí)間
 const now = Date.now();
 const [timeRange, setTimeRange] = useState([now - 1000 * 60 * 60 * 24 * 7, now]);
 // 數(shù)據(jù)列表
 const [dataList, setDataList] = useState([]);
 
 
 
 // 點(diǎn)擊搜索按鈕
 function handleBtnClick() {
 // ②點(diǎn)擊按鈕后請(qǐng)求數(shù)據(jù)
 const params = {};
 title && (params.title = title);
 dataId && (params.dataId = dataId);
 params.startTime = String(timeRange[0]);
 params.endTime = String(timeRange[1]);
 doGet(params);
 }
 
 // ③data改變后，重新渲染列表。
 // 這里相當(dāng)于 componentDidUpdate。當(dāng)data發(fā)生改變時(shí)，重新渲染頁(yè)面
 useEffect(() => {
 setDataList(data);
 }, [data]);
 
 // ④首次進(jìn)入頁(yè)面時(shí)，無(wú)任何篩選項(xiàng)。拉取數(shù)據(jù)，渲染頁(yè)面。
 // useEffect第二個(gè)參數(shù)為一個(gè)空數(shù)組，相當(dāng)于在 componentDidMount 時(shí)執(zhí)行該「副作用」
 useEffect(() => {
 doGet({});
 }, []);


 return <section className="app">
 <Title title="數(shù)據(jù)查詢(xún)" />
 <Tabs label="類(lèi)型" tabs={tabs} tab={tab} onChange={setTab} />
 <Input value={dataId} placeholder="請(qǐng)輸入數(shù)據(jù)ID" onChange={setDataid}>ID</Input>
 <Input value={title} placeholder="請(qǐng)輸入數(shù)據(jù)標(biāo)題" onChange={setTitle}>標(biāo)題</Input>
 <TimeRange label="數(shù)據(jù)時(shí)間" value={timeRange} onChange={handleTimeChange}/>
 <article className="btn-container">
 <Button type="primary" isLoading={isLoading} onClick={handleBtnClick}>
 查詢(xún) 
 </Button>
 </article>
 <Table dataList={dataList}></Table>
 </section>
};