图片没有操作的前提下合成

<script src="js/html2canvas.min.js"></script>

 //合成图片
          var targetDom = $('.page-get');
          //var targetDom = $('.showPhoto');
          html2canvas(targetDom[0], {useCORS:true}).then(canvas => {
              var dataUrl = canvas.toDataURL();
          $(".show_poto .get_img").attr("src",dataUrl);
          //alert(dataUrl); //合成图片的url
          //console.log(canvas.toDataURL());
      });