whatwg/html

onerror and onunhandledrejection/onrejectionhandled could use some nice developer-friendly examples

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#676 opened on Feb 10, 2016

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clarificationgood first issuetopic: error reporting

Description

I notice that these features aren't really summarized anywhere developer-readable.

This is kind of a good first bug. Coming up with nice examples is an art. For promise rejection events, you can draw inspiration from https://nodejs.org/api/process.html#process_event_unhandledrejection. In all cases, I think it would be ideal to show use of something like navigator.sendBeacon for reporting the errors to the server.

I intend to work on this soon unless someone else volunteers. When that happens I'll update the assignee to myself and remove "good first bug". In the meantime, community members should feel free to use the comments to submit small examples that illustrate good production uses of these events.

Contributor guide

Tech stack
html
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.
half day
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.
mostly clear
Prerequisites
JavaScriptHTML event handlingnavigator.sendBeacon
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75
Research direction
Examine existing event examples in the HTML specification (e.g., onerror). Look at Node.js documentation for unhandledrejection examples. Consider using navigator.sendBeacon for error reporting. Provide concise, runnable code snippets that demonstrate production use cases.