Encountering an error in Cytoscape using Angular and Typescript: TS2305 - Module lacks default export

I am working on an Angular app and trying to integrate Cytoscape. I have installed Cystoscape and Types/cytoscape using npm, but I encountered an error when trying to import it into my project. To troubleshoot, I started a new test project before implementing it in my main app.

This is my app.module:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';

import { AppComponent } from './app.component';
import { GraphComponent } from './graphCytoscape/graph.component';
import cytoscape = require('cytoscape');


@NgModule({
  declarations: [
    AppComponent,
    GraphComponent,
  ],
  imports: [
    BrowserModule,
  ],
  exports: [],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

This is my component:

import { Component, OnInit } from '@angular/core';
import cytoscape from 'cytoscape';

@Component({
    selector: 'app-graph',
    templateUrl: 'graph.component.html'
})

export class GraphComponent implements OnInit {
    cy;
    constructor() { }

    ngOnInit() {
        this.cy = cytoscape({
             container: document.getElementById('cy'),
             elements: [
                { data: { id: 'a' } },
                { data: { id: 'b' } },
                { data: {
                    id: {
                        id: 'ab',
                        source: 'a',
                        target: 'b',
                    }
                }
            },
        ]
    });
   }
 }

The error message I received is:

ERROR in src/app/graphCytoscape/graph.component.ts(2,8): error TS2305: Module '"C:/Users/hudson.joubert/Documents/projects/cytoscopeJS/node_modules/@types/cytoscape/index"' has no

default export.

I checked the node_modules folder and found the necessary files, but I'm unsure how to resolve this issue.

Answer №1

If you encounter this issue:

ERROR in src/app/graphCytoscape/graph.component.ts(2,8): error TS2305: Module '"C:/Users/hudson.joubert/Documents/projects/cytoscopeJS/node_modules/@types/cytoscape/index"' ...

Solution: To resolve this error, you must install the type declaration file by running npm import @types/cytoscape

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