React服务器rending收到警告..React尝试重用标记

Question

这是我的组件代码：

import React from 'react';
import {Link} from 'react-router';
import NavbarStore from '../stores/NavbarStore';
import NavbarActions from '../actions/NavbarActions';

class Navbar extends React.Component {
  constructor(props) {
    super(props);
    this.state = NavbarStore.getState();
    this.onChange = this.onChange.bind(this);
  }

  componentDidMount() {
    NavbarStore.listen(this.onChange);
    NavbarActions.getCharacterCount();

    let socket = io.connect();

    socket.on('onlineUsers', (data) => {
      NavbarActions.updateOnlineUsers(data);
    });

    $(document).ajaxStart(() => {
      NavbarActions.updateAjaxAnimation('fadeIn');
    });

    $(document).ajaxComplete(() => {
      setTimeout(() => {
        NavbarActions.updateAjaxAnimation('fadeOut');
      }, 750);
    });
  }

  componentWillUnmount() {
    NavbarStore.unlisten(this.onChange);
  }

  onChange(state) {
    this.setState(state);
  }

  handleSubmit(event) {
    event.preventDefault();

    let searchQuery = this.state.searchQuery.trim();

    if (searchQuery) {
      NavbarActions.findCharacter({
        searchQuery: searchQuery,
        searchForm: this.refs.searchForm,
        history: this.props.history
      });
    }
  }

  render() {
    return (
      <nav className='navbar navbar-default navbar-static-top'>
        <div className='navbar-header'>
          <button type='button' className='navbar-toggle collapsed' data-toggle='collapse' data-target='#navbar'>
            <span className='sr-only'>Toggle navigation</span>
            <span className='icon-bar'></span>
            <span className='icon-bar'></span>
            <span className='icon-bar'></span>
          </button>
          <Link to='/' className='navbar-brand'>
            <span className={'triangles animated ' + this.state.ajaxAnimationClass}>
              <div className='tri invert'></div>
              <div className='tri invert'></div>
              <div className='tri'></div>
              <div className='tri invert'></div>
              <div className='tri invert'></div>
              <div className='tri'></div>
              <div className='tri invert'></div>
              <div className='tri'></div>
              <div className='tri invert'></div>
            </span>
            NEF
            <span className='badge badge-up badge-danger'>{this.state.onlineUsers}</span>
          </Link>
        </div>
        <div id='navbar' className='navbar-collapse collapse'>
          <form ref='searchForm' className='navbar-form navbar-left animated' onSubmit={this.handleSubmit.bind(this)}>
            <div className='input-group'>
              <input type='text' className='form-control' placeholder={this.state.totalCharacters + ' characters'} defaultValue={this.state.searchQuery} onChange={NavbarActions.updateSearchQuery} />
              <span className='input-group-btn'>
                <button className='btn btn-default' onClick={this.handleSubmit.bind(this)}><span className='glyphicon glyphicon-search'></span></button>
              </span>
            </div>
          </form>
          <ul className='nav navbar-nav'>
            <li><Link to='/'>Home</Link></li>
            <li><Link to='/stats'>Stats</Link></li>
            <li className='dropdown'>
              <a href='#' className='dropdown-toggle' data-toggle='dropdown'>Top 100 <span className='caret'></span></a>
              <ul className='dropdown-menu'>
                <li><Link to='/top'>Top Overall</Link></li>
                <li className='dropdown-submenu'>
                  <Link to='/top/caldari'>Caldari</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/top/caldari/achura'>Achura</Link></li>
                    <li><Link to='/top/caldari/civire'>Civire</Link></li>
                    <li><Link to='/top/caldari/deteis'>Deteis</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/top/gallente'>Gallente</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/top/gallente/gallente'>Gallente</Link></li>
                    <li><Link to='/top/gallente/intaki'>Intaki</Link></li>
                    <li><Link to='/top/gallente/jin-mei'>Jin-Mei</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/top/minmatar'>Minmatar</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/top/minmatar/brutor'>Brutor</Link></li>
                    <li><Link to='/top/minmatar/sebiestor'>Sebiestor</Link></li>
                    <li><Link to='/top/minmatar/vherokior'>Vherokior</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/top/amarr'>Amarr</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/top/amarr/amarr'>Amarr</Link></li>
                    <li><Link to='/top/amarr/ni-kunni'>Ni-Kunni</Link></li>
                    <li><Link to='/top/amarr/khanid'>Khanid</Link></li>
                  </ul>
                </li>
                <li className='divider'></li>
                <li><Link to='/shame'>Hall of Shame</Link></li>
              </ul>
            </li>
            <li className='dropdown'>
              <a href='#' className='dropdown-toggle' data-toggle='dropdown'>Female <span className='caret'></span></a>
              <ul className='dropdown-menu'>
                <li><Link to='/female'>All</Link></li>
                <li className='dropdown-submenu'>
                  <Link to='/female/caldari'>Caldari</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/female/caldari/achura'>Achura</Link></li>
                    <li><Link to='/female/caldari/civire/'>Civire</Link></li>
                    <li><Link to='/female/caldari/deteis'>Deteis</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/female/gallente'>Gallente</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/female/gallente/gallente'>Gallente</Link></li>
                    <li><Link to='/female/gallente/intaki'>Intaki</Link></li>
                    <li><Link to='/female/gallente/jin-mei'>Jin-Mei</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/female/minmatar'>Minmatar</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/female/minmatar/brutor'>Brutor</Link></li>
                    <li><Link to='/female/minmatar/sebiestor'>Sebiestor</Link></li>
                    <li><Link to='/female/minmatar/vherokior'>Vherokior</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/female/amarr'>Amarr</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/female/amarr/amarr'>Amarr</Link></li>
                    <li><Link to='/female/amarr/ni-kunni'>Ni-Kunni</Link></li>
                    <li><Link to='/female/amarr/khanid'>Khanid</Link></li>
                  </ul>
                </li>
              </ul>
            </li>
            <li className='dropdown'>
              <a href='#' className='dropdown-toggle' data-toggle='dropdown'>Male <span className='caret'></span></a>
              <ul className='dropdown-menu'>
                <li><Link to='/male'>All</Link></li>
                <li className='dropdown-submenu'>
                  <Link to='/male/caldari'>Caldari</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/male/caldari/achura'>Achura</Link></li>
                    <li><Link to='/male/caldari/civire'>Civire</Link></li>
                    <li><Link to='/male/caldari/deteis'>Deteis</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/male/gallente'>Gallente</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/male/gallente/gallente'>Gallente</Link></li>
                    <li><Link to='/male/gallente/intaki'>Intaki</Link></li>
                    <li><Link to='/male/gallente/jin-mei'>Jin-Mei</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/male/minmatar'>Minmatar</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/male/minmatar/brutor'>Brutor</Link></li>
                    <li><Link to='/male/minmatar/sebiestor'>Sebiestor</Link></li>
                    <li><Link to='/male/minmatar/vherokior'>Vherokior</Link></li>
                  </ul>
                </li>
                <li className='dropdown-submenu'>
                  <Link to='/male/amarr'>Amarr</Link>
                  <ul className='dropdown-menu'>
                    <li><Link to='/male/amarr/amarr'>Amarr</Link></li>
                    <li><Link to='/male/amarr/ni-kunni'>Ni-Kunni</Link></li>
                    <li><Link to='/male/amarr/khanid'>Khanid</Link></li>
                  </ul>
                </li>
              </ul>
            </li>
            <li><Link to='/add'>Add</Link></li>
          </ul>
        </div>
      </nav>
    );
  }
}

export default Navbar;

我正在使用反应服务器rending。

<input type='text' className='form-control' placeholder={this.state.totalCharacters + ' characters'} defaultValue={this.state.searchQuery} onChange={NavbarActions.updateSearchQuery} />

问题是我在INPUT元素中添加了占位符。

客户结果

<input type="text" class="form-control" placeholder="0 characters" value=""
          data-reactid="25">

服务器结果：

<input type="text" placeholder="0 characters" class="form-control" value=""
          data-reactid="25">

然后我收到一条警告信息：

  

“警告：React试图在容器中重用标记，但是   校验和无效。

这通常意味着您正在使用服务器呈现，并且在服务器上生成的标记不是客户端所期望的。 React注入了新的标记以补偿哪些有效但你已经失去了服务器渲染的许多好处。相反，弄清楚为什么生成的标记在客户端或服务器上是不同的：↵（客户端）＆gt;

如何解决？谢谢！

EVN： react@15.0.1 react-router@2.0 的NodeJS

Answer 1

当我删除占位符attr。它工作正常。