react项目报错集锦

import React, { Component } from 'react'
import Avatar from '@img/common/avatar.jpeg'
import Stance from '@img/common/stance.png'

class CusImage extends Component {  
  constructor(props){
    super(props)

    const defaultImage = props.isAvatar ? Avatar : Stance
    
    this.state = {
      src: defaultImage
    }
  }
  
  componentDidMount(){
    const THIS = this
    const {imgSrc} = this.props
    const img = new Image()
    img.src = imgSrc
    img.onload = function(){
      THIS.setState({
        src: imgSrc
      })
    }
  }

  // 添加以下代码
  componentWillUnmount(){
    // 如果有定时器需要清除
    // clearTimeout(this.timer)
    this.setState = (state, callback) => {
      return
    }
  }
  
  render (){
    const {src} = this.state
    const {className, alt = "cus-img"} = this.props
    return (
      <img className={className} src={src} alt={alt}/>
    )
  }
}

export default CusImage