小编Ele*_*tro的帖子

我正在尝试根据内容高度更改textarea的高度。我看到事件处理程序不会更改高度，因为它会被引导程序样式覆盖。请帮忙！

class PostForm extends React.Component {
  constructor(props){
    super(props);
    this.state = {titleHeight: '30', storyHeight: 1};                                                    
    this.handleKeyUp = this.handleKeyUp.bind(this);
  }
  handleKeyUp(event){
    this.setState({titleHeight: document.getElementById('post_title').scrollHeight});
    this.setState({storyHeight: document.getElementById('post_story').scrollHeight});
  }
  render () {
        var csrfToken = $('meta[name=csrf-token]').attr('content');
        return (
          <form action='create' method='post' acceptCharset='UTF-8' className= "form-group">
            <input type='hidden' name='_method' value='patch'/>
            <input type='hidden' name='utf8' value='?' />
            <input type='hidden' name='authenticity_token' value={csrfToken} />
            <textarea id="post_title" name="post[title]" className="form-control boldText" style={formStyle.textArea} height={this.state.titleHeight} onKeyUp={this.handleKeyUp} placeholder="Title"/>
            <textarea id="post_story" name="post[story]" className="form-control" style={formStyle.textArea} height={this.state.storyHeight} onKeyUp={this.handleKeyUp} placeholder="Start telling the story"/>
            <input name="commit" type="submit" value="Post" className="btn" style={formStyle.button}/>
          </form> …