组件： canvas type="2d" class="canvas"

API 使用如下：

const query = wx.createSelectorQuery()

wx.getImageInfo({

src:"https://xxx.jpg",

success: function(picRes) {

query.select('.canvas')

  .fields({ node: true, size: true })

  .exec((res) => {

var canvas = res[0].node

var context = canvas.getContext('2d')

context.drawImage(picRes.path, 100, 100, 100, 100)

})

  }

)

}

})

报错如下图 望解答