mozilla/rhino

Support ES2021 WeakRef & FinalizationRegistry

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#943 opened on Jun 23, 2021

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Ecma Incompatibilityfeaturegood first issue

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Description

WeakRef, for referring to a target object without preserving it from garbage collection FinalizationRegistry, to manage registration and unregistration of cleanup operations performed when target objects are garbage collected

Proposal: https://github.com/tc39/proposal-weakrefs MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/WeakRef

Contributor guide

Research direction
Study the Rhino codebase to understand how existing ES features are implemented, particularly class and prototype mechanisms. Look for existing tests for WeakRef and FinalizationRegistry. Examine the linked proposal and MDN specification.
Tech stack
javascriptjava
Domain
devtools
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
JavaJavaScriptGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30