//画布背景色
      ctx.fillStyle = "pink";
      ctx.fillRect(10, 10, 50, 50)


      // 标题
      ctx.font= 'normal bold 40px serif'
      ctx.fillText(words,100,100)


      //画图片
      const image = canvas.createImage()
      image.onload = ()=>{
        ctx.drawImage(image,0,0)
      }
      image.src = "图片地址"