Error in uploading zip files about perfcascade

[micmro]

Hm, looks like you are missing the zip functionality. Have you imported perf-cascade-file-reader.js (or alternatively perf-cascade-file-reader.min.js)?

[surya0014]

Where should we import perf-cascade-file-reader.min.js or perf-cascade-file-reader.js ?
I tried importing perf-cascade-file-reader.js from dist in perf-cascade ( node_modules ) to my ts component. But still i am getting same error ( “zip.BlobReader is not a constructor “ )

my ts component :
import * as perfcascadeReader from '../../../../node_modules/perf-cascade/dist/perf-cascade-file-reader.js';
perfcascadeReader.readFile(elem.files[0], elem.value, function (error, data) {
if (error) {

        console.log("error " + error);
      } else {

        // handle success
        //renderPerfCascadeChart(data);
        this.perfCascadeSvg = fromHar(data);
        console.log(this.perfCascadeSvg);
      }
    }, function (progress) {
      console.log("unzip progress: ", progress / 100, "%");
    });