Document possible values of `options` property to `EventSource`

Description

Contributor guide

Tech stack

javascript

Domain

documentation

Issue type

documentation

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.

clear

Prerequisites

basic JavaScriptunderstanding of EventSource API

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

80

Research direction

Examine the source code (likely in the repository's main file, e.g., 'eventsource.js') to identify all properties of the options object accepted by the EventSource constructor. List each property with its type, default value if any, and possible values. Also review the current README or any existing documentation to ensure consistency. Consider adding a doc example or reference to MDN.