Failed to execute ‘drawImage’ on ‘CanvasRenderingContext2D’: The provided value is not of type ‘(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)’

TypeError: Failed to execute ‘drawImage’ on ‘CanvasRenderingContext2D’: The provided value is not of type ‘(CSSImageValue or HTMLImageElement or SVGImageElement or HTMLVideoElement or HTMLCanvasElement or ImageBitmap or OffscreenCanvas)’

就是把一张图写入画布，然后把画布导出，百度了案例，怎么弄都不成功，社区的各位老师帮忙看看呀。

const ctx = wx.createCanvasContext('myCanvas')
          ctx.drawImage(imgs, 0, 0)
          ctx.draw()
          setTimeout(function(){
              wx.canvasToTempFilePath({
                x: 0,
                y: 0,
                canvas: 'myCanvas',
                fileType: 'jpg',
                success(res) {
                  console.log(res)
                }
              })
          },500)
          this.basicsSteps()
        }