"Encountered a problem when trying to import stellar-sdk into an Angular

Our team is currently working on developing an app that will interact with the Horizon Stellar Server. As newcomers in this area, we are exploring the use of Angular 8 and Ionic 4 frameworks. However, we have encountered difficulties when trying to import the js-stellar-sdk successfully. A new app was created for testing purposes, but unfortunately, it fails to compile.

We attempted the following workaround: However, we faced errors stating "StellarSdk is not defined" and "Server is not a constructor/function" even after commenting out the declaration.

Further investigation led us to this link: https://github.com/stellar/js-stellar-base/issues/128 Where it was mentioned that the issue had already been resolved as per: https://github.com/stellar/js-stellar-base/issues/128#issuecomment-474474028 We wanted to follow the suggestions provided here: https://github.com/stellar/js-stellar-base/issues/128#issuecomment-391374590 However, it appears that the solution may no longer be applicable in Angular 8 (unsure if manual creation is required).

This snippet shows our app.component.ts file:

import { Component, OnInit } from '@angular/core';
import { Server } from 'stellar-sdk';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit{
  title = 'example';
  server: any;

  ngOnInit(): void{
    this.server = new Server('https://horizon.stellar.org');
  }  
}

The error message received is as follows:

ERROR in ./node_modules/eventsource/lib/eventsource.js Module not found: Error: Can't resolve 'http' in 'C:\Users\Rafael Cisneros\Desktop\Work\Ionic\example\node_modules\eventsource\lib' ERROR in ./node_modules/eventsource/lib/eventsource.js Module not found: Error: Can't resolve 'https' in 'C:\Users\Rafael Cisneros\Desktop\Work\Ionic\example\node_modules\eventsource\lib'

Answer №1

I successfully solved the issue by making some changes. The problem lies within the file called eventsource.js, located here: "\node_modules\stellar-sdk\node_modules\eventsource\lib" To fix it, open the file and update the following lines:

var https = require('https')
var http = require('http')

Change them to:

var https = require('@angular/common/http')
var http = require('@angular/common/http')

If the problem persists, you may also want to consider modifying

import { Server } from 'stellar-sdk';

to something like:

import * as StellarSDK from 'stellar-sdk';

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