我正在使用 react-router 进行反应。我正在尝试在 react-router 的“链接”中传递属性
var React = require('react');
var Router = require('react-router');
var CreateIdeaView = require('./components/createIdeaView.jsx');
var Link = Router.Link;
var Route = Router.Route;
var DefaultRoute = Router.DefaultRoute;
var RouteHandler = Router.RouteHandler;
var App = React.createClass({
render : function(){
return(
<div>
<Link to="ideas" params={{ testvalue: "hello" }}>Create Idea</Link>
<RouteHandler/>
</div>
);
}
});
var routes = (
<Route name="app" path="/" handler={App}>
<Route name="ideas" handler={CreateIdeaView} />
<DefaultRoute handler={Home} />
</Route>
);
Router.run(routes, function(Handler) {
React.render(<Handler />, document.getElementById('main'))
});
“链接”呈现页面但不将属性传递给新视图。下面是查看代码
var React = require('react');
var Router = require('react-router');
var CreateIdeaView = React.createClass({
render : function(){
console.log('props form link',this.props,this)//props not recived
return(
<div>
<h1>Create Post: </h1>
<input type='text' ref='newIdeaTitle' placeholder='title'></input>
<input type='text' ref='newIdeaBody' placeholder='body'></input>
</div>
);
}
});
module.exports = CreateIdeaView;
如何使用“链接”传递数据?
此行缺少 path
:
<Route name="ideas" handler={CreateIdeaView} />
应该:
<Route name="ideas" path="/:testvalue" handler={CreateIdeaView} />
鉴于以下 Link
(过时的 v1):
<Link to="ideas" params={{ testvalue: "hello" }}>Create Idea</Link>
v4/v5 的最新版本:
const backUrl = '/some/other/value'
// this.props.testvalue === "hello"
// Using query
<Link to={{pathname: `/${this.props.testvalue}`, query: {backUrl}}} />
// Using search
<Link to={{pathname: `/${this.props.testvalue}`, search: `?backUrl=${backUrl}`} />
<Link to={`/${this.props.testvalue}?backUrl=${backUrl}`} />
在 中,withRouter(CreateIdeaView)
组件 render()
withRouter
高阶组件的过时用法:
console.log(this.props.match.params.testvalue, this.props.location.query.backurl)
// output
hello /some/other/value
在使用 useParams
和 useLocation
钩子的功能组件中:
const CreatedIdeaView = () => {
const { testvalue } = useParams();
const { query, search } = useLocation();
console.log(testvalue, query.backUrl, new URLSearchParams(search).get('backUrl'))
return <span>{testvalue} {backurl}</span>
}
从您在文档上发布的链接到页面底部:
给定一个像
使用一些存根查询示例更新了代码示例:
// import React, {Component, Props, ReactDOM} from 'react'; // 从 'react-router' 导入 {Route, Switch}; etc etc // 此代码段已将其全部附加到窗口,因为它在浏览器中 const { BrowserRouter, Switch, Route, Link, NavLink } = ReactRouterDOM;类 World 扩展 React.Component { constructor(props) { super(props);控制台.dir(道具); this.state = { fromIdeas: props.match.params.WORLD || '未知' } } 渲染() { 常量 { 匹配,位置} = this.props; return ( {this.state.fromIdeas}
thing: {location.query && location.query.thing}
another1: {location.query && location.query.another1 || 'none for 2 or 3'}
#更新:
从 1.x 到 2.x 的升级指南:、onEnter 和 isActive 使用位置描述符 现在除了字符串之外还可以使用位置描述符。不推荐使用查询和状态道具。 // v1.0.x // v2.0.0 // 在 2.x 中仍然有效 同样,从 onEnter 挂钩重定向现在也使用位置描述符。 // v1.0.x (nextState, replaceState) => replaceState(null, '/foo') (nextState, replaceState) => replaceState(null, '/foo', { the: 'query' }) // v2 .0.0 (nextState, replace) => replace('/foo') (nextState, replace) => replace({ pathname: '/foo', query: { the: 'query' } }) 用于自定义类链接组件,同样适用于 router.isActive,之前的 history.isActive。 // v1.0.x history.isActive(pathname, query, indexOnly) // v2.0.0 router.isActive({ pathname, query }, indexOnly)
#v3 到 v4 的更新:
https://github.com/ReactTraining/react-router/blob/432dc9cf2344c772ab9f6379998aa7d74c1d43de/packages/react-router/docs/guides/migrating.md
https://github.com/ReactTraining/react-router/pull/3803
https://github.com/ReactTraining/react-router/pull/3669
https://github.com/ReactTraining/react-router/pull/3430
https://github.com/ReactTraining/react-router/pull/3443
https://github.com/ReactTraining/react-router/pull/3803
https://github.com/ReactTraining/react-router/pull/3636
https://github.com/ReactTraining/react-router/pull/3397
https://github.com/ReactTraining/react-router/pull/3288
界面基本还是v2一样,最好看一下react-router的CHANGES.md,因为那是更新的地方。
供后代使用的“遗留迁移文件”
https://github.com/ReactTraining/react-router/blob/dc7facf205f9ee43cebea9fab710dce036d04f04/packages/react-router/docs/guides/migrating.md
https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v1.0.0.md
https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.0.0.md
https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.2.0.md
https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.4.0.md
https://github.com/ReactTraining/react-router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-guides/v2.5.0.md
有一种方法可以传递多个参数。您可以将“to”作为对象而不是字符串传递。
// your route setup
<Route path="/category/:catId" component={Category} / >
// your link creation
const newTo = {
pathname: "/category/595212758daa6810cbba4104",
param1: "Par1"
};
// link to the "location"
// see (https://reacttraining.com/react-router/web/api/location)
<Link to={newTo}> </Link>
// In your Category Component, you can access the data like this
this.props.match.params.catId // this is 595212758daa6810cbba4104
this.props.location.param1 // this is Par1
react-router-dom
的 V6。为此,请参阅 this answer。
我在从我的应用程序中显示用户详细信息时遇到了同样的问题。
你可以这样做:
<Link to={'/ideas/'+this.props.testvalue }>Create Idea</Link>
或者
<Link to="ideas/hello">Create Idea</Link>
和
<Route name="ideas/:value" handler={CreateIdeaView} />
在您的 CreateIdeaView 类中通过 this.props.match.params.value
获取此信息。
您可以观看对我有很大帮助的视频:https://www.youtube.com/watch?v=ZBxMljq9GSE
简单的是:
<Link to={{
pathname: `your/location`,
state: {send anything from here}
}}
现在你想访问它:
this.props.location.state
props
传递
至于 react-router-dom 4.xx (https://www.npmjs.com/package/react-router-dom),您可以将参数传递给组件以通过以下方式路由:
<Route path="/ideas/:value" component ={CreateIdeaView} />
链接方式(考虑将 testValue 属性传递给渲染链接的相应组件(例如上面的 App 组件))
<Link to={`/ideas/${ this.props.testValue }`}>Create Idea</Link>
将道具传递给您的组件构造函数,值参数将通过
props.match.params.value
/movie/detail/${this.state.id}
} className="btn btn-secondary btn-lg active">Detail</Link>
安装后 react-router-dom
<Link
to={{
pathname: "/product-detail",
productdetailProps: {
productdetail: "I M passed From Props"
}
}}>
Click To Pass Props
</Link>
和路由重定向的另一端执行此操作
componentDidMount() {
console.log("product props is", this.props.location.productdetailProps);
}
打字稿
对于许多答案中提到的这种方法,
<Link
to={{
pathname: "/my-path",
myProps: {
hello: "Hello World"
}
}}>
Press Me
</Link>
我遇到了错误,
对象字面量只能指定已知属性,并且类型 'LocationDescriptorObject | 中不存在 'myProps' ((位置:位置)=> LocationDescriptor)'
然后我签入了他们为相同目的提供的 state
的 official documentation。
所以它是这样工作的,
<Link
to={{
pathname: "/my-path",
state: {
hello: "Hello World"
}
}}>
Press Me
</Link>
在您的下一个组件中,您可以获得以下值,
componentDidMount() {
console.log("received "+this.props.location.state.hello);
}
要解决上面的答案 (https://stackoverflow.com/a/44860918/2011818),您还可以将对象内嵌在 Link 对象内的“To”中。
<Route path="/foo/:fooId" component={foo} / >
<Link to={{pathname:/foo/newb, sampleParam: "Hello", sampleParam2: "World!" }}> CLICK HERE </Link>
this.props.match.params.fooId //newb
this.props.location.sampleParam //"Hello"
this.props.location.sampleParam2 //"World!"
在您的 Link 组件中执行状态
<Link to='register' state={{name:'zayne'}}>
现在要访问您访问的页面中的项目,请导入 useLocation
import {useLocation} from 'react-router-dom';
const Register=()=>{
const location = useLocation()
//store the state in a variable if you want
//location.state then the property or object you want
const Name = location.state.name
return(
<div>
hello my name is {Name}
</div>
)
}
对于 v5
<Link
to={{
pathname: "/courses",
search: "?sort=name",
hash: "#the-hash",
state: { fromDashboard: true }
}}
/>
就我而言,我有一个带有空道具的功能组件,这解决了它:
<Link
to={{
pathname: `/dashboard/${device.device_id}`,
state: { device },
}}
>
View Dashboard
</Link>
在你的函数组件中,你应该有这样的东西:
import { useLocation } from "react-router"
export default function Dashboard() {
const location = useLocation()
console.log(location.state)
return <h1>{`Hello, I'm device ${location.state.device.device_id}!`}</h1>
}
最简单的方法是使用文档中提到的 link
中的 to:object
:
https://reactrouter.com/web/api/Link/to-object
<Link
to={{
pathname: "/courses",
search: "?sort=name",
hash: "#the-hash",
state: { fromDashboard: true, id: 1 }
}}
/>
我们可以检索上述参数(状态),如下所示:
this.props.location.state // { fromDashboard: true ,id: 1 }
如果您只是想替换路线中的 slug,您可以使用 generatePath
和 was introduced in react-router 4.3 (2018)。到今天为止,它还没有包含在 react-router-dom (web) documentation 中,而是包含在 react-router (core) 中。 Issue#7679
// myRoutes.js
export const ROUTES = {
userDetails: "/user/:id",
}
// MyRouter.jsx
import ROUTES from './routes'
<Route path={ROUTES.userDetails} ... />
// MyComponent.jsx
import { generatePath } from 'react-router-dom'
import ROUTES from './routes'
<Link to={generatePath(ROUTES.userDetails, { id: 1 })}>ClickyClick</Link>
这与 django.urls.reverse
已有一段时间的概念相同。
对于 v6: 注意! state
应该在 to={}
之外
// route setup
<Route path="/employee-edit/:empId" element={<EmployeeEdit />} / >
Link
到组件
<Link to={"/employee-edit/1"} state={{ data: employee }} > Edit </Link>
或者
<Link to={{
pathname: "/employee-edit/1",
search: "?sort=name",
hash: "#the-hash",
}}
state={{ data: employee }} > Edit </Link>
注意: state
在 to{}
之外,但对于 v5:
<Link
to={{
pathname: "/courses",
search: "?sort=name",
hash: "#the-hash",
state: { fromDashboard: true }
}}
/>
功能组件:
import React from "react";
import { useLocation } from "react-router-dom";
const LinkTest = () => {
const location = useLocation();
console.log("Location", location);
return <h1>Link Test</h1>;
};
export default LinkTest;
类组件:为了使用钩子,我们需要将其包装在功能组件中并传递道具:
import React, { Component } from "react";
import { useLocation, useParams } from "react-router-dom";
class LinkTestComponent extends Component {
render() {
console.log(this.props);
return <h1>Link Test</h1>;
}
}
export default () => (
<LinkTestComponent params={useParams()} location={useLocation()} />
);
测试: "react-router-dom": "^6.2.2",
我为此苦苦挣扎了几个小时,但这个主题中没有一个答案对我有用。最后,我设法在 documentation 中找到了 React Router 6 的解决方案。
这是完整的示例:
// App.js
<BrowserRouter>
<Routes>
<Route path="/books/:bookId" element={ <BookDetails /> } />
</Routes>
</BrowserRouter>
// BookDetails.js
import React from "react"
import { useParams } from "react-router-dom"
export default function BookPage() {
const params = useParams()
return <div> { console.log(params.bookId) } </div>
}
请注意,useParams
不能在类组件内调用,因此您必须使用函数组件(有关详细信息,请参阅 this 答案)。
路线:
<Route state={this.state} exact path="/customers/:id" render={(props) => <PageCustomer {...props} state={this.state} />} />
然后可以像这样访问 PageCustomer 组件中的参数:this.props.match.params.id
。
例如 PageCustomer 组件中的 api 调用:
axios({
method: 'get',
url: '/api/customers/' + this.props.match.params.id,
data: {},
headers: {'X-Requested-With': 'XMLHttpRequest'}
})
更新 25-11-21 感谢上面写的 alex-adestech.mx。我能够传输整个对象并在 send-component 中从中提取所有必要的字段:
<Button type="submit" component={NavLink} to={{
pathname: '/basequestion',
state: {question} }}
variant="contained"
size="small">Take test</Button>
在接收组件中:
import { useLocation } from "react-router"
const BaseQuestion = () => {
const location = useLocation();
const {description, title, images} = (location.state.question);
不定期副业成功案例分享
/ideas/${this.props.testvalue}
}>{this.props.testvalue}</Link><Link to={`/ideas/${this.props.testvalue}`}>{this.props.testvalue}</Link>
,带反引号<Link to={'/ideas/'+this.props.testvalue }>{this.props.testvalue}</Link>