在ReactJS中录制音频

import React, { Component } from 'react';

class AudioRecorder extends Component {
  constructor(props) {
    super(props);
    this.state = {
      stream: null,
      recorder: null,
      audioUrl: null
    };
  }

  componentDidMount() {
    navigator.mediaDevices.getUserMedia({ audio: true })
      .then(stream => {
        const recorder = new MediaRecorder(stream);
        this.setState({ stream, recorder });
      })
      .catch(error => {
        console.error('Error accessing audio device:', error);
      });
  }

  startRecording = () => {
    const { recorder } = this.state;
    if (recorder) {
      recorder.start();
    }
  }

  stopRecording = () => {
    const { recorder } = this.state;
    if (recorder) {
      recorder.stop();
      recorder.ondataavailable = event => {
        const audioBlob = new Blob([event.data], { type: 'audio/webm' });
        const audioUrl = URL.createObjectURL(audioBlob);
        this.setState({ audioUrl });
      };
    }
  }

  render() {
    const { audioUrl } = this.state;

    return (
      <div>
        <button onClick={this.startRecording}>Start Recording</button>
        <button onClick={this.stopRecording}>Stop Recording</button>
        {audioUrl && <audio controls src={audioUrl} />}
      </div>
    );
  }
}

export default AudioRecorder;