如何获得选择选项值React

Question

我需要我的项目一些帮助。我认为这差不多完成了，但是我不知道该如何完成...

所以，我想用输入，选择和按钮来构建应用程序。在输入中，您可以编写例如mettalica，然后单击按钮应用程序后，将显示所有歌曲，标题和tabTypes（吉他标签）的列表。问题是我想从选择中获取信息并仅渲染包括例如播放器选项卡在内的歌曲。

沙盒代码：https://codesandbox.io/s/react-example-ys6py?fontsize=14&hidenavigation=1&theme=dark

class Search extends React.Component {
  state = {
    searchValue: "",
    songs: [],
    musicTabs: [
      'Dowolne',
      'Bass',
      'Player',
      'Chords',
      'Guitar'
    ],
    result: ''
  };

  handleOnChange = event => {
    this.setState({ searchValue: event.target.value });
  };

  handleSelectChange = (event) => {
    this.setState({
      result: event.target.value
    })
    console.log(this.state.result)
  }

  handleSearch = () => {
    this.makeApiCall(this.state.searchValue);
  };

  makeApiCall = async searchInput => {
    let api_url = `https://www.songsterr.com/a/ra/songs/byartists.json?artists=${searchInput}`;
    const response = await fetch(api_url);
    const songs = await response.json();
    this.setState({ songs });
  };

  render() {
    return (
      <div>
        <Header />
        <input
          name="text"
          type="search"
          placeholder="Search..."
          onChange={event => this.handleOnChange(event)}
          value={this.state.SearchValue}
        />

        <Select optionValue={ this.state.musicTabs } change={ this.handleSelectChange } value={ this.state.result } />

        <br />
        <button onClick={this.handleSearch}>Search</button>


        {this.state.songs ? (
          <div>
            {
              this.state.songs.map((song, index) => (
                <div key={index} className="lists">
                  <h1>Artist: <span>{song.artist.name}</span></h1>
                  <h2>Song title: <span>{song.title}</span></h2>
                  <ol>
                    <b>Available tabs:</b>
                    {song.tabTypes.map((tab, index) =>
                      <li key={index}> {song.tabTypes[index]} </li>
                    )}

                  </ol>

                </div>
              ))


            }
          </div>
        ) : (
            <p>Something</p>
          )}
      </div>
    );
  }
}



const Select = (props) => {
  const { optionValue, change } = props;

  const valueMusicTabs = optionValue.map((musicTab, index) => {
   return <option name={ optionValue[index] } key={ index }> { optionValue[index] } </option>
  })

  return (

    <>
    <select onChange={ change }>
      { valueMusicTabs } 

    </select>

  </>

  )
};

感谢帮助人员！

Answer 1

我认为您做对了所有事情，只是使用了错误的prop

<Select optionValue={ this.state.musicTabs } onChange={ this.handleSelectChange } value={ this.state.result } />

change组件上的Select属性仅应更改为onChange，因为它是默认事件，它将与事件一起传递给您的handleChange方法