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Functions without return incorrectly get their return argument from the last evaluated expression

C-VMIssues and PRs related to the Boa Virtual Machine.Issues and PRs related to the Boa Virtual Machine.

E-MediumMedium difficulty problemMedium difficulty problem

Status: Open.

Bug

#4485 In boa-dev/boa;

· jedel1043 opened on Oct 24, 2025

Audit public APIs

A-APIChanges related to public APIsChanges related to public APIs

E-MediumMedium difficulty problemMedium difficulty problem

Help WantedExtra attention is neededExtra attention is needed

Status: Open.

Task

#4524 In boa-dev/boa;

· jedel1043 opened on Nov 7, 2025

fix(string): ensure separator is an object before calling Symbol.split

A-BugSomething isn't workingSomething isn't working

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 4664

#4664 In boa-dev/boa;

· amrkhaled104 opened on Feb 22, 2026

Add support for duplicate named capturing groups in regex

A-EnhancementNew feature or requestNew feature or request

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 4550

#4550 In boa-dev/boa;

· n-faria opened on Nov 27, 2025

Make JsAsyncGenerator fully type safe

A-InternalChanges that don't modify execution behaviourChanges that don't modify execution behaviour

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

Waiting On ReviewWaiting on reviews from the maintainersWaiting on reviews from the maintainers

Status: Open (in progress).

boa-dev/boanumber 5066

#5066 In boa-dev/boa;

· jedel1043 opened on Mar 14, 2026

Optimize array unshift

A-PerformancePerformance related changes and issuesPerformance related changes and issues

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 5076

#5076 In boa-dev/boa;

· yush-1018 opened on Mar 14, 2026

Draft: Initial implementation of ShadowRealm built-in with realm isolation

C-ActionsPull requests that update Github Actions codePull requests that update Github Actions code

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-DependenciesPull requests that update a dependency filePull requests that update a dependency file

C-RuntimeIssues and PRs related to Boa's runtime featuresIssues and PRs related to Boa's runtime features

C-TestsIssues and PRs related to the tests.Issues and PRs related to the tests.

Status: Draft (not ready).

boa-dev/boanumber 5077

#5077 In boa-dev/boa;

· ParthMozarkar opened on Mar 14, 2026

Implement core disposal logic for explicit resource management

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-TestsIssues and PRs related to the tests.Issues and PRs related to the tests.

C-VMIssues and PRs related to the Boa Virtual Machine.Issues and PRs related to the Boa Virtual Machine.

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 5079

#5079 In boa-dev/boa;

· abhinavs1920 opened on Mar 14, 2026

feat(intl): implement Date.prototype.toLocaleString, toLocaleDateString, and toLocaleTimeString

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-IntlChanges related to the `Intl` implementationChanges related to the `Intl` implementation

C-TestsIssues and PRs related to the tests.Issues and PRs related to the tests.

Waiting On ReviewWaiting on reviews from the maintainersWaiting on reviews from the maintainers

Status: Open (in progress).

boa-dev/boanumber 5080

#5080 In boa-dev/boa;

· alienx5499 opened on Mar 15, 2026

Implement Temporal.Duration.prototype.toLocaleString

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-Documentationupdate documentationupdate documentation

Waiting On ReviewWaiting on reviews from the maintainersWaiting on reviews from the maintainers

Status: Open (in progress).

boa-dev/boanumber 5091

#5091 In boa-dev/boa;

· SKM2227229725 opened on Mar 15, 2026

feat(intl): implement Temporal.Instant.prototype.toLocaleString

BlockedWaiting for another code changeWaiting for another code change

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

Status: Open (in progress).

boa-dev/boanumber 5096

#5096 In boa-dev/boa;

· JkrishnaD opened on Mar 15, 2026

feat(intl): implement Temporal.PlainYearMonth.prototype.toLocaleString

BlockedWaiting for another code changeWaiting for another code change

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-IntlChanges related to the `Intl` implementationChanges related to the `Intl` implementation

C-TestsIssues and PRs related to the tests.Issues and PRs related to the tests.

Status: Draft (not ready).

boa-dev/boanumber 5098

#5098 In boa-dev/boa;

· alienx5499 opened on Mar 15, 2026

docs: add JsObject design document

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-Documentationupdate documentationupdate documentation

Status: Draft (not ready).

boa-dev/boanumber 5099

#5099 In boa-dev/boa;

· ParthMozarkar opened on Mar 15, 2026

Implement FinalizationRegistry

A-EnhancementNew feature or requestNew feature or request

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-CLIIssues and PRs related to the Boa command line interface.Issues and PRs related to the Boa command line interface.

C-DependenciesPull requests that update a dependency filePull requests that update a dependency file

C-GCIssue related to garbage collectionIssue related to garbage collection

C-TestsIssues and PRs related to the tests.Issues and PRs related to the tests.

Waiting On ReviewWaiting on reviews from the maintainersWaiting on reviews from the maintainers

Status: Open (in progress).

boa-dev/boanumber 5101

#5101 In boa-dev/boa;

· jedel1043 opened on Mar 15, 2026

Improve readability of CLI trace output

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-VMIssues and PRs related to the Boa Virtual Machine.Issues and PRs related to the Boa Virtual Machine.

Waiting On ReviewWaiting on reviews from the maintainersWaiting on reviews from the maintainers

Status: Open (in progress).

boa-dev/boanumber 5104

#5104 In boa-dev/boa;

· sahanaxzy opened on Mar 15, 2026

fix: pass previousRealm to AsyncGeneratorCompleteStep in AsyncGeneratorYield

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-TestsIssues and PRs related to the tests.Issues and PRs related to the tests.

C-VMIssues and PRs related to the Boa Virtual Machine.Issues and PRs related to the Boa Virtual Machine.

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 5106

#5106 In boa-dev/boa;

· xcb3d opened on Mar 16, 2026

Refactor/lexer hex optimization ,#5108

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-ParserIssues surrounding the parserIssues surrounding the parser

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 5109

#5109 In boa-dev/boa;

· MayankRaj435 opened on Mar 16, 2026

Add MVP of virtual machine tracer

A-APIChanges related to public APIsChanges related to public APIs

A-EnhancementNew feature or requestNew feature or request

C-VMIssues and PRs related to the Boa Virtual Machine.Issues and PRs related to the Boa Virtual Machine.

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 4931

#4931 In boa-dev/boa;

· nekevss opened on Mar 7, 2026

perf: elide function environment when only this escapes into arrows

A-PerformancePerformance related changes and issuesPerformance related changes and issues

C-VMIssues and PRs related to the Boa Virtual Machine.Issues and PRs related to the Boa Virtual Machine.

Waiting On ReviewWaiting on reviews from the maintainersWaiting on reviews from the maintainers

Status: Open (in progress).

boa-dev/boanumber 5019

#5019 In boa-dev/boa;

· hansl opened on Mar 12, 2026

fix(cli): handle recoverable errors gracefully and remove panics #4798

A-Technical DebtChanges related to technical debtChanges related to technical debt

C-CLIIssues and PRs related to the Boa command line interface.Issues and PRs related to the Boa command line interface.

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 4816

#4816 In boa-dev/boa;

· Shivampal157 opened on Mar 2, 2026

docs: update REPL demo GIF with modern JS features

A-EnhancementNew feature or requestNew feature or request

C-Documentationupdate documentationupdate documentation

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 4835

#4835 In boa-dev/boa;

· Saksham1o opened on Mar 3, 2026

cli: return non-zero for uncaught runtime exceptions

A-BugSomething isn't workingSomething isn't working

C-CLIIssues and PRs related to the Boa command line interface.Issues and PRs related to the Boa command line interface.

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 4964

#4964 In boa-dev/boa;

· SergioChan opened on Mar 9, 2026

perf: use FxHashSet for O(1) name lookups in declaration instantiation

A-PerformancePerformance related changes and issuesPerformance related changes and issues

C-VMIssues and PRs related to the Boa Virtual Machine.Issues and PRs related to the Boa Virtual Machine.

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 5024

#5024 In boa-dev/boa;

· tkshsbcue opened on Mar 13, 2026

fix: replace panics with proper error handling in module env and dyna…

A-Technical DebtChanges related to technical debtChanges related to technical debt

C-VMIssues and PRs related to the Boa Virtual Machine.Issues and PRs related to the Boa Virtual Machine.

Waiting On AuthorWaiting on PR changes from the authorWaiting on PR changes from the author

Status: Open (in progress).

boa-dev/boanumber 5051

#5051 In boa-dev/boa;

· tkshsbcue opened on Mar 14, 2026

Enable oscars behind feature flags in boa_gc

C-BuiltinsPRs and Issues related to builtins/intrinsicsPRs and Issues related to builtins/intrinsics

C-DependenciesPull requests that update a dependency filePull requests that update a dependency file

C-GCIssue related to garbage collectionIssue related to garbage collection

Waiting On ReviewWaiting on reviews from the maintainersWaiting on reviews from the maintainers

Status: Open (in progress).

boa-dev/boanumber 5115

#5115 In boa-dev/boa;

· nekevss opened on Mar 17, 2026