Issue encountered while trying to import jszip in Angular project

Encountering an error when trying to import jszip into my TypeScript component file.

After successfully running npm install jszip and confirming the package is properly installed, I proceed to import it using:

import * as JSZip from 'jszip';

This results in the following error message being displayed:

Error: node_modules/@types/node/globals.d.ts:72:13 - error TS2403: Subsequent variable declarations must have the same type. Variable 'AbortSignal' requires a type of '{ new (): AbortSignal; prototype: AbortSignal; abort(reason?: any): AbortSignal; timeout(milliseconds: number): AbortSignal; }', but currently has a type of '{ new (): AbortSignal; prototype: AbortSignal; }'.

72 declare var AbortSignal: { ~~~~~~~~~~~

node_modules/typescript/lib/lib.dom.d.ts:2071:13 2071 declare var AbortSignal: { 'AbortSignal' was also previously declared here.

The environment I am working with includes: Angular version 15.1.1 Typescript version 4.9.6 jszip version 3.10.1

angulartypescriptjszip

Answer №1

For those using Angular 15, consider utilizing typescript version 4.8.4 for optimal performance.

Answer №2

To resolve the issue, I managed to solve it by including @types/node in my development dependencies:

npm install --save-dev @types/node

Answer №3

Experiment with TypeScript version 4.7.2 and test out the following code:

import * as JSZip from 'jszip';
import { saveAs } from 'file-saver';

download() {
    const j: JSZip = new (<any>JSZip).default();

    j.file('Greetings.txt', 'Hello Universe\n');

    j.generateAsync({ type: 'blob' }).then(function (content) {
      // view FileSaver.js
      saveAs(content, 'sample.zip');
    });
  }

Don't forget to install: npm i file-saver to save the file.
Check it out: JSZip demo

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