html2canvas图片跨域问题图文详解

 <img :src="sharedata.data.imageUrl" crossorigin="anonymous">

let downimg= ()=>{
  setTimeout(()=>{
    proxy.$nextTick(()=>{
      html2canvas(document.querySelector('#img'),{
        useCORS: true
      }).then(canvas => {
        var url = canvas.toDataURL()     //把canvas转成base64
        document.querySelector('#downimg').href = url
        document.querySelector('#downimg').download = "我的持仓报告.png"
        document.querySelector('#downimg').click()
      })
    })
  },2000)
}