react-学习笔记

1.安装命令:

  npm install -g create-react-app

  create-ract-app projectName

  cd projectName

  npm start;

2.安装react-router

  npm isntall -S react-router

  //引入

  import {Router,Route,hasHistory} from 'react-router';

  render((

    <Router history={hasHistory}>

      <Route path='/' component={App} />  

    </Router>

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

3.安装jquery

  npm install --save-dev jquery

  import $ from 'jquery'

  

4.路由嵌套

  <Router history={hashHistory}>

    <Route  path="/" component={APP}>

      <Route  path = '/exm' component={Exam} />

    </Route>

  </Router>

    在跟路由下,用this.props.children获取

5.Link

  <Link to="/" activeStyle={{color:'red'}}>首页</Link>

  或者指定className

  <Link to="/" activeClassName='acitve'>首页</Link>

6.context

  

class ParName extends Component{
    constructor(props, context) {
        super(props, context);
        this.context.router; // it works
    }
    // static contextTypes = { router: React.PropTypes.object }
    handleSubmit(event){
        event.preventDefault();
        const username = event.target.elements[0].value;
        const desc = event.target.elements[1].value;
        const path = `/p/${username}/${desc}`;
        this.context.router.push(path);

    }
    render(){
        return(
            <div>
                <h2>Repos</h2>
                <ul>
                  <li><NavLink to="/p/reactjs/react-router">React Router</NavLink></li>
                  <li><NavLink to="/p/facebook/react">React</NavLink></li>
                  <li>
                      <form onSubmit = {this.handleSubmit.bind(this)}>
                          <input type='text' placeholder='username'/> / {' '}
                          <input type='text' placeholder='desc'/>{' '}
                          <button type='submit'>go</button>
                      </form>
                  </li>
                </ul>
                {this.props.children}
          </div>
        )
    }
}
ParName.contextTypes = {
  router: React.PropTypes.object
};

 - -一定要记住bind(this)

posted @ 2017-09-18 11:11  面包_girl  阅读(208)  评论(0编辑  收藏  举报
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