React 服务器渲染收到警告。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渲染。

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

问题是当我在 INPUT 元素中添加占位符时。

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消息：

“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渲染，并且在服务器上生成的标记不是客户端所期望的。 React 注入了新的标记来补偿哪些工作，但是您已经失去了服务器渲染的许多好处。相反，找出为什么在客户端或服务器上生成的标记不同：↵（客户端）>

如何解决？谢谢！

evn: 反应@15.0.1 反应路由器@2.0 节点

Answer 1

当我删除占位符 attr.它工作正常。