What to write in module - Module not found: Error: Can't resolve 'xlsx' in angular

I'm trying to use xlsx library in my project but I'm continuously getting a following error

Module not found: Error: Can't resolve 'xlsx'.
​

I know, I have to declare in app.module but what would I declare here Here is my code; please guide me

This is component file -

import { Component, EventEmitter, OnInit } from "@angular/core";
import { Router } from "@angular/router";
import { FileUploader } from "ng2-file-upload";
import * as XLSX from "xlsx";

@Component({
selector: "import-user",
templateUrl: "import-user.component.html"
})
export class ImportUserComponent implements OnInit {

public importResults: any[];
public errorMessage: string;
static reader: FileReader = new FileReader();

ngOnInit(): void {

}

public uploader: FileUploader = new FileUploader({
url: this.getUploadUrl(),
disableMultipart: false,
autoUpload: false,
removeAfterUpload: false,
method: 'post',
allowedFileType: ['.xlsx', '.xls', '.csv'],
});

constructor(private router: Router) {
}

private initializeUploader() {
this.uploader.onErrorItem = (item, response) => { this.errorMessage = response; };
}

public onFileSelected(event: EventEmitter<File[]>) {
this.errorMessage = '';
const file: File = event[0];
console.log(file);
}

public getXLSXRequest(file: any){
var wb = XLSX.readFile(file);
}


}

This is module file

import { FormsModule, ReactiveFormsModule } from "@angular/forms";
import { BrowserModule } from '@angular/platform-browser';
import { CommonModule } from "@angular/common";
import { NgModule } from "@angular/core";
import { routing } from "./routing";
import { FileUploadModule } from "ng2-file-upload";
import { ImportUserComponent } from "./components/import-user.component";

@NgModule({
imports: [
CommonModule,
routing,
SharedModule,
FormsModule,
PortalModuleExports,
FileUploadModule,
BrowserModule
],
declarations: [
ImportUserComponent
],
providers: [

]
})
export class AdministrationModule {
}


Here is the package as well.



Continue reading...