Chaining Promises

chained_promise.js

  let tmp = ["#chart_placeholder_0", "#prod_fill_weight_placeholder"]
  Promise.all(tmp.map(d => html2canvas(document.querySelector(d))))
    .then(function (images) {
      _.each(images, (canvas, idx) => {
        img.file(`${idx}.png`, canvas.toDataURL("image/png", [0.0, 1.0]).split(',')[1], { base64: true });
      })


      // after
      zip.generateAsync({ type: "blob" }).then(function (content) {
        saveAs(content, "example.zip");
      })
    })