使用React构建自定义循环进度条

import React from 'react';

class CustomProgressBar extends React.Component {
  constructor(props) {
    super(props);
    this.state = {
      progress: 0
    };
  }

  componentDidMount() {
    this.timer = setInterval(() => {
      if (this.state.progress < 100) {
        this.setState(prevState => ({
          progress: prevState.progress + 1
        }));
      } else {
        clearInterval(this.timer);
      }
    }, 100);
  }

  componentWillUnmount() {
    clearInterval(this.timer);
  }

  render() {
    return (
      <div>
        <div className="progress-bar" style={{ width: `${this.state.progress}%` }}></div>
        <span>{this.state.progress}%</span>
      </div>
    );
  }
}

export default CustomProgressBar;