Yaffle/EventSource

EventSourcePolyfill is not defined

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#129 opened on Mar 24, 2019

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help wanted

Description

Im working in ionic 4.10.2 with angular 7.3.5.

npm install event-source-polyfill

Then added this to the top of my file:

import 'event-source-polyfill/src/eventsource.js' declare var EventSourcePolyfill: any;

And then using it like this:

    this.source = new EventSourcePolyfill(url, {
      headers: {
        "Authorization": "Bearer " + this.userService.user.token,
        "X-Requested-With": "XMLHttpRequest"
      }
    });

I then get the following error:

ERROR ReferenceError: EventSourcePolyfill is not defined

I've checked that the path is correct. Any other things Im missing?

Contributor guide

Tech stack
javascript
Domain
frontend
Issue type
bug
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
unclear
Prerequisites
Basic JavaScriptnpmAngular basics
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
The issue reports a `ReferenceError: EventSourcePolyfill is not defined` when using the polyfill in an Angular 7 project. First, verify that the polyfill correctly exports `EventSourcePolyfill` in its source files (src/eventsource.js). Check if any existing tests or examples demonstrate correct usage. Additionally, consider if the TypeScript declaration import requires additional configuration. Look at the repository's README and issue comments for guidance, and possibly create a minimal reproduction in a clean Angular project to confirm if the error is caused by a missing export or incorrect import method.
EventSourcePolyfill is not defined · Yaffle/EventSource#129 | Good First Issue