React里的tab选项卡方法

import React, { Component } from 'react';
class Copy extends Component {
  constructor(props) {
    super(props);
    this.state = {
      current: 1
    }
  }
  tabFn(index) {
    this.setState({
      current: index
    })
  }
  componentDidMount() {
    this.tabFn(1)
  }
  clsFn(index, curCls, cls) {
    let { current } = this.state
    return current === index ? curCls : cls;
  }
  render() {
    return (
      <div>
        <h1>这是tab选项卡</h1>
        <div className="tab_con">
          <ol>
            <li onClick={() => { this.tabFn(1) }} className={this.clsFn(1, 'curr', '')}>菜单一</li>
            <li onClick={() => { this.tabFn(2) }} className={this.clsFn(2, 'curr', '')}> 菜单二</li>
            <li onClick={() => { this.tabFn(3) }} className={this.clsFn(3, 'curr', '')}> 菜单三</li>
          </ol>
          <ul>
            <li className={this.clsFn(1, 'current', '')}>内容一</li>
            <li className={this.clsFn(2, 'current', '')}>内容二</li>
            <li className={this.clsFn(3, 'current', '')}>内容三</li>
          </ul>
        </div>
      </div>
    )
  }
}
export default Copy;