完整原文:https://hongwan.xyz/archives/
react躺坑记
react是目前最火的框架了,之前用了VUE,感觉比较简单;这次新做的web server交给我做,于是就想使用下新框架,练手
项目很急,基础够稳,又老是遇到各种问题;面向谷歌和StackOverFlow编程;
常见错误
Uncaught TypeError: Cannot read property 'setState' of undefined
没有绑定
this.handleSubmit=this.handleSubmit.bind(this)
https://blog.csdn.net/huanghanqian/article/details/80548100
路由组件切换回到顶部
import { Component } from 'react'; import { withRouter } from 'react-router-dom'; class ScrollToTop extends Component { componentDidUpdate(prevProps) { if (this.props.location !== prevProps.location) { window.scrollTo(0, 0) } } render() { return this.props.children } } export default withRouter(ScrollToTop);
监听鼠标
上下:onWheel
handleWheel (event) { let deta = event.deltaY; if(deta > 0){ console.log("向下") //window.scrollTo(0,3200) } if (deta<0){ console.log("向上") //window.scrollTo(500,0) } }
addEventListener
//离开组件前移除 componentWillUnmount(){ window.removeEventListener('scroll', this.handleScroll); } //挂载 componentDidMount(){ window.addEventListener('scroll', this.handleScroll); }
上线打包空白:
这个react和vue都有,
"homepage":"."
https://blog.csdn.net/Sophie_U/article/details/80006723
Warning: Hash history cannot PUSH the same path; a new entry will not be add
Link 增加replace
<Link to='/Citation' replace>Citation</Link>
使用axios post 提交数据,后台获取不到提交的数据解决方案原因:前端提交的数据格式与后台解析的格式不一样
如:application/x-www-form-urlencoded
application/json
https://blog.csdn.net/wopelo/article/details/78783442
看服务器介绍数据格式,如果是application/x-www-form-urlencoded,可以使用qs,制作对应的格式;
application/json就是对象形式了;
https://www.cnblogs.com/loveyaxin/p/8385694.html?tdsourcetag=s_pctim_aiomsg
Import in body of module; reorder to top import/first
import 必须在其它所有业务代码前面(eslint 暴出)
Warning: Encountered two children with the same key
table的值key 一样了
dispatch is not a function
使用react-redux,把null加上
export default connect(null,mapDispathToProps)(WrappedWebserver)
echarts空白不报错
必须在div 中把长宽写上!!!百分比也行
<div id="gopie" style={{ width: 400, height: 400 }}>Sample proteins matchs no GO annotations</div>
使用document.getElementById.innerHTML 替换之后再重新渲染不出图。
ant design anchor锚点和hisory router 冲突
如果路由更改为使用browserrouter 后需要后端跟着改配置;
使用react-router-hash-lin
常用插件
react-loadable 异步组件
https://github.com/jamiebuilds/react-loadable
Warning: Invalid DOM property class
. Did you mean className
?
react 自带了className
class属性改为className
iE支持
npm install --save-dev babel-polyfill
在src目录下的index.js 第一行加入:
import "babel-polyfill";
全屏幻灯片插件
https://github.com/alvarotrigo/fullPage.js#license
点击图片放大插件
https://github.com/Caldis/react-zmage
警告
Using target="_blank" without rel="noopener noreferrer" is a security risk:
在超链接上增加 ,否则有危险
rel="nofollow me noopener noreferrer"
No duplicate props allowed react/jsx-no-duplicate-props
同一个class设置两个一样的名字
Unexpected string concatenation of literals no-useless-concat
字符串拼接没有按照Eslint规则
(YES)
const value = `; ${document.cookie}`; const parts = value.split(`; ${name}=`);
vs
(NO)
onst value = '; ' + document.cookie; const parts = value.split('; ' + name + '=');
fetch使用:
据说比axio还好,但是我不成熟,包装不好
https://www.jianshu.com/p/d0d21baf41b1
https://segmentfault.com/a/1190000011433064
坑:
npm install whatwg-fetch --save
为了兼容老版本浏览器,还需要安装
npm install es6-promise --save。
import 'whatwg-fetch'; import 'es6-promise';
访问:
http://www.lysinetcga.renlab.org/webserver/get_username/
** 更改设置过后需要重启项目!!! **
app.use(proxy('/api', { target: 'http://www.lysinetcga.renlab.org/', changeOrigin: true, pathRewrite:{ '^/api':'', }, } )
'/api/webserver/get_username/'
获取数据:
index.html 所在文件夹的api文件夹下的diaoyongR.php
/api/diaoyongR.php
app.use(proxy('/api', { target: 'http://localhost:8088/', changeOrigin: true, pathRewrite:{ '^/api':'api', }, } ));
var result = fetch('/api/diaoyongR.php', { method: 'POST', body: "cancer=1&gene=2", credentials: 'include', headers: { 'Accept': 'application/json, text/plain, */*', 'Content-Type': 'application/x-www-form-urlencoded' } });
var result2 = fetch('/api/headerList.json', { credentials: 'include', headers: { 'Accept': 'application/json, text/plain, */*' } });
result.then(res => { return res.text() // 将请求来的数据转化成 文本形式 //return res.json() // 将数据转换成json格式 }).then(text => { console.log(text) }).catch(function (e) { console.log("fetch fail"); });
axios
主页下方的headerList.json文件;
pathRewrite更改需要重启
如果是在主页目的 api2 文件夹下方的headerList.json,
改为:/api/api2/headerList.json
app.use(proxy('/api', { target: 'http://localhost:8088/', changeOrigin: true, pathRewrite:{ '^/api':'', }, } ));
axios.get('/api/headerList.json',{ // cancer:'cancer1', // gene:"gene1" }).then((res)=>{ console.log(res.data) }) .catch(function (error) { console.log(error) })
来源:https://www.cnblogs.com/hongwan/p/12510158.html