小编典典

在Link react-router中传递道具

javascript

我正在用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？

阅读 328

2020-05-01

共1个答案

小编典典

此行缺失path：

<Route name="ideas" handler={CreateIdeaView} />

应该：

<Route name="ideas" path="/:testvalue" handler={CreateIdeaView} />

鉴于以下情况Link （过时的v1） ：

<Link to="ideas" params={{ testvalue: "hello" }}>Create Idea</Link>

自v4起最新 ：

const backUrl = '/some/other/value'
// this.props.testvalue === "hello"
<Link to={{pathname: `/${this.props.testvalue}`, query: {backUrl}}} />

并在withRouter(CreateIdeaView)组件中render()：

console.log(this.props.match.params.testvalue, this.props.location.query.backurl)
// output
hello /some/other/value

从您在文档上发布的链接，朝页面底部：

给定一条路线 <Route name="user" path="/users/:userId"/>

使用一些存根查询示例更新了代码示例：

// import React, {Component, Props, ReactDOM} from 'react';

// import {Route, Switch} from 'react-router'; etc etc

// this snippet has it all attached to window since its in browser

const {

  BrowserRouter,

  Switch,

  Route,

  Link,

  NavLink

} = ReactRouterDOM;



class World extends React.Component {

  constructor(props) {

    super(props);

    console.dir(props);

    this.state = {

      fromIdeas: props.match.params.WORLD || 'unknown'

    }

  }

  render() {

    const { match, location} = this.props;

    return (

      <React.Fragment>

        <h2>{this.state.fromIdeas}</h2>

        <span>thing:

          {location.query

            && location.query.thing}

        </span><br/>

        <span>another1:

        {location.query

          && location.query.another1

          || 'none for 2 or 3'}

        </span>

      </React.Fragment>

    );

  }

}



class Ideas extends React.Component {

  constructor(props) {

    super(props);

    console.dir(props);

    this.state = {

      fromAppItem: props.location.item,

      fromAppId: props.location.id,

      nextPage: 'world1',

      showWorld2: false

    }

  }

  render() {

    return (

      <React.Fragment>

          <li>item: {this.state.fromAppItem.okay}</li>

          <li>id: {this.state.fromAppId}</li>

          <li>

            <Link

              to={{

                pathname: `/hello/${this.state.nextPage}`,

                query:{thing: 'asdf', another1: 'stuff'}

              }}>

              Home 1

            </Link>

          </li>

          <li>

            <button

              onClick={() => this.setState({

              nextPage: 'world2',

              showWorld2: true})}>

              switch  2

            </button>

          </li>

          {this.state.showWorld2

           &&

           <li>

              <Link

                to={{

                  pathname: `/hello/${this.state.nextPage}`,

                  query:{thing: 'fdsa'}}} >

                Home 2

              </Link>

            </li>

          }

        <NavLink to="/hello">Home 3</NavLink>

      </React.Fragment>

    );

  }

}





class App extends React.Component {

  render() {

    return (

      <React.Fragment>

        <Link to={{

          pathname:'/ideas/:id',

          id: 222,

          item: {

              okay: 123

          }}}>Ideas</Link>

        <Switch>

          <Route exact path='/ideas/:id/' component={Ideas}/>

          <Route path='/hello/:WORLD?/:thing?' component={World}/>

        </Switch>

      </React.Fragment>

    );

  }

}



ReactDOM.render((

  <BrowserRouter>

    <App />

  </BrowserRouter>

), document.getElementById('ideas'));


<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/react-router-dom/4.3.1/react-router-dom.min.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/react-router/4.3.1/react-router.min.js"></script>



<div id="ideas"></div>

更新：

参见：https :
//github.com/ReactTraining/react-
router/blob/0c6d51cd6639aff8a84b11d89e27887b3558ed8a/upgrade-
guides/v2.0.0.md#link-to-onenter-and-isactive-use-location-
descriptors

从1.x到2.x的升级指南：

<Link to>，onEnter和isActive使用位置描述符

<Link to>现在可以在字符串之外添加位置描述符。查询和状态道具已弃用。

// v1.0.x
<Link to="/foo" query={{ the: 'query' }}/>
// v2.0.0
<Link to={{ pathname: '/foo', query: { the: 'query' } }}/>
//在2.x版本中仍然有效
<Link to="/foo"/>
同样，从onEnter挂钩重定向现在也使用了位置描述符。

// 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’ } })

对于自定义的类似链接的组件，同样适用于router.isActive，以前是history.isActive。

// v1.0.x
history.isActive(pathname, query, indexOnly)
// v2.0.0
router.isActive({ pathname, query }, indexOnly)

2020-05-01