swc-project/swc

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Rust-based platform for the Web

Stars: 34.2k
Forks: 1.6k
Open beginner issues: 0
Indexed issues: 366
Avg merge: 23h 11m
Merged PRs (30d): 125

Dominant language: Rust
License: Apache-2.0
Last GitHub push: Sep 18, 2026
Latest indexed: Sep 19, 2026
Contributing guide: Contributing guide
Code of conduct: No code of conduct
Beginner labels: help wanted

Beginner friendly Everything

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366 open issues indexed

Flow parser fails to parse leading `|` in match cases Open

Difficulty 3/5 1-2 days Newbie friendliness 78/100

swc-project/swc#12389 · Opened Sep 17, 2026
es/minifier: class field callback shared across instances after helper inlining Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

swc-project/swc#12380 · Opened Sep 16, 2026
Node.js Amaro Features Open

Difficulty 5/5 Over a week Newbie friendliness 42/100

swc-project/swc#12378 · 1 comment · Opened Sep 15, 2026
`compress.inline` changes memory semantics for closures Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

swc-project/swc#12344 · Opened Sep 11, 2026
es/minifier: toplevel false fails to preserve global var inside a block Open

C-bug Labor0

swc-project/swc#12314 · 1 assignee · Opened Sep 9, 2026
es/minifier: property mangling leaves literal property references unchanged Open

C-bug Labor0

swc-project/swc#12312 · 1 assignee · Opened Sep 9, 2026
es/minifier: unused class elimination removes superclass validation Open

C-bug Labor0

swc-project/swc#12310 · 1 assignee · Opened Sep 9, 2026
es/minifier: class effect extraction loses implicit strict mode Open

C-bug Labor0

swc-project/swc#12309 · 1 assignee · Opened Sep 9, 2026
es/minifier: static method aliasing detaches receiver-dependent Promise methods Open

C-bug Labor0

swc-project/swc#12308 · 1 assignee · Opened Sep 9, 2026
es/minifier: self-assignment removal ignores immutable binding writes Open

C-bug Labor0

swc-project/swc#12302 · 1 assignee · Opened Sep 9, 2026
es/minifier: prototype key lookup treats unknown computed properties as absent Open

C-bug Labor0

swc-project/swc#12297 · 1 assignee · Opened Sep 9, 2026
es/minifier: method-to-arrow conversion ignores direct eval in the body Open

C-bug Labor0

swc-project/swc#12295 · 1 assignee · Opened Sep 9, 2026
bindings: ship self-loading compressed native npm addons Open

Labor0

swc-project/swc#12273 · 1 assignee · Opened Sep 6, 2026
es/minifier: conditional call merging moves common argument effects before the test Open

C-bug

swc-project/swc#12225 · 1 assignee · Opened Sep 5, 2026
es/minifier: IIFE inlining moves new.target across its function boundary Open

C-bug

swc-project/swc#12220 · 1 assignee · Opened Sep 5, 2026
es/minifier: null-or-undefined comparison folding drops effects in typed operands Open

C-bug

swc-project/swc#12217 · 1 assignee · Opened Sep 5, 2026
es/minifier: conditional constructor folding evaluates the callee before its condition Open

C-bug

swc-project/swc#12216 · 1 assignee · Opened Sep 5, 2026
es/minifier: removing an unused rest parameter creates mapped arguments Open

C-bug

swc-project/swc#12211 · 1 assignee · Opened Sep 5, 2026
es/minifier: arguments replacement rewrites delete and update operands Open

C-bug

swc-project/swc#12210 · 1 assignee · Opened Sep 5, 2026
es/minifier: string-to-template raw conversion double-escapes existing escapes Open

C-bug

swc-project/swc#12207 · 1 assignee · Opened Sep 5, 2026
es/minifier: removing undefined defaults changes parameter list semantics Open

C-bug

swc-project/swc#12203 · 1 assignee · Opened Sep 5, 2026
es/minifier: invalid RegExp constructor pattern becomes an early syntax error Open

C-bug

swc-project/swc#12202 · 1 assignee · Opened Sep 5, 2026
es/minifier: IIFE inlining runs before pure DCE, so the /*#__PURE__*/ annotation is lost Open

C-bug Labor0

swc-project/swc#12165 · 1 comment · 1 assignee · Opened Aug 27, 2026
mangle reassigns the shadowing-avoidance rename that compress introduced Open

C-bug Labor0

swc-project/swc#12155 · 1 assignee · Opened Aug 25, 2026
minifier: removes a function declaration required by CaseBlock initialization Open

C-bug

swc-project/swc#12145 · 1 assignee · Opened Aug 24, 2026
ES5 transform changes closure semantics for a closure created in a for-loop initializer Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 55/100

swc-project/swc#12143 · Opened Aug 24, 2026
Optimizer can miscompile or discard `instanceof` evaluation Open

Difficulty 3/5 1-2 days Newbie friendliness 25/100

swc-project/swc#12111 · 2 comments · Opened Aug 10, 2026
Unterminated template literals cause endless lexer loop Open

Difficulty 3/5 1-2 days Newbie friendliness 58/100

swc-project/swc#12103 · 4 comments · 1 reaction · Opened Aug 5, 2026
Wasm heap buffer overflow in variable-length CBOR host serialization Open

swc-project/swc#11989 · 1 assignee · Opened Jul 5, 2026
Consider removing the `@swc/core` postinstall script Open

Difficulty 4/5 3-5 days Newbie friendliness 45/100

swc-project/swc#11898 · 1 comment · 16 reactions · Opened May 26, 2026
`swc` transforms decorators when target: "esnext" (inconsistent with `tsc`) Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 52/100

swc-project/swc#11784 · Opened Apr 12, 2026
SWC Resolver Incorrectly Resolves Cross-Namespace References Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 45/100

swc-project/swc#11607 · 1 comment · Opened Mar 2, 2026
Typescript namespaces lead to `ReferenceError` Open

C-bug

swc-project/swc#11514 · 11 comments · 1 assignee · Opened Jan 28, 2026
safari(13.1.2) es2016 Bug caused by function parameter compression Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

swc-project/swc#11513 · 18 comments · Opened Jan 28, 2026
Make ES parser less strict Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

swc-project/swc#11468 · 2 comments · Opened Jan 21, 2026
Support compressing duplicated import specifiers Open

enhancement

swc-project/swc#11467 · 3 comments · 1 assignee · Opened Jan 21, 2026
Polyfill is not work when `env.mode` is `usage` after 1.12.11 Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swc-project/swc#11295 · Opened Nov 18, 2025
Operator "in" shouldn't be removed Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swc-project/swc#11246 · 5 comments · Opened Nov 7, 2025
[Meta] Performance issues Open

Difficulty 5/5 Over a week Newbie friendliness 15/100

swc-project/swc#11228 · 1 reaction · Opened Nov 4, 2025
support for syntax plugins? Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 25/100

swc-project/swc#11165 · Opened Oct 23, 2025
In loose mode, static class properties are transformed to static class block Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 42/100

swc-project/swc#11141 · 4 comments · Opened Oct 6, 2025
swc_ecma_utils doesn't build on docs.rs Open

Difficulty 3/5 1-2 days Newbie friendliness 42/100

swc-project/swc#11137 · Opened Oct 2, 2025
BUG: option resolveFully does not work with transform, but works with transformFile Open

C-bug

swc-project/swc#11064 · 1 comment · 1 assignee · Opened Sep 5, 2025
`design:type`/`design:paramtypes`/`design:returntype` is wrong for Enums in a different module Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

swc-project/swc#11033 · 1 comment · Opened Aug 27, 2025
Future proofing of static blocks transform Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 38/100

swc-project/swc#10956 · 2 comments · 1 reaction · Opened Jul 29, 2025
`es/minifier`: Inline parameters Open

enhancement

Difficulty 5/5 Over a week Newbie friendliness 35/100

swc-project/swc#10931 · 6 comments · Opened Jul 23, 2025
es/minifier: larger output when inlining large numbers Open

C-bug

swc-project/swc#10929 · 1 assignee · Opened Jul 23, 2025
`es/ast`: Align AST with `typescript-eslint` (and babel) Open

enhancement

swc-project/swc#10873 · 3 comments · 9 reactions · 1 assignee · Opened Jul 16, 2025
Improve SWC minifier compression rate Open

swc-project/swc#10858 · 1 assignee · Opened Jul 15, 2025
can't get `outFileExtension` option to change file extension Open

C-bug

Difficulty 4/5 3-5 days Newbie friendliness 35/100

swc-project/swc#10848 · 10 reactions · Opened Jul 13, 2025

swc-project/swc

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