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perf(es/minifier): Apply pending substitutions in batch for if-dense statement lists

Status: Draft (not ready).

swc-project/swcnumber 12079

#12079 In swc-project/swc;

· hamidrezahanafi opened on Jul 28, 2026

safari(13.1.2) es2016 Bug caused by function parameter compression

C-bug

Status: Open.

#11513 In swc-project/swc;

· T9-Forever opened on Jan 28, 2026

[AST] shape of Param, Pat and VarDeclarator

C-bug

Status: Open.

#5416 In swc-project/swc;

· magic-akari opened on Aug 8, 2022

The code behind multiline comments can not start a new line

C-bug

Status: Open.

#5674 In swc-project/swc;

· bwy111 opened on Aug 30, 2022

Plugin template should have rust-toolchain

enhancement

Status: Open.

#5711 In swc-project/swc;

· kdy1 opened on Sep 1, 2022

Source maps not mapping close parenthesis

C-bug

Status: Open.

#6239 In swc-project/swc;

· dsherret opened on Oct 23, 2022

Invalid Scoping on for loop variables

C-bug

Status: Open.

#6440 In swc-project/swc;

· sno2 opened on Nov 15, 2022

A commonjs module could be wrongly marked with __esModule: true while enabling external helpers

C-bug

Status: Open.

#6500 In swc-project/swc;

· hyfdev opened on Nov 23, 2022

keepClassNames break class decorators

C-bug

Status: Open.

#6515 In swc-project/swc;

· falkenhawk opened on Nov 26, 2022

SWC exits successfully even though input path does not exist

C-bug

Status: Open.

#6725 In swc-project/swc;

· bduffany opened on Dec 28, 2022

Name mangler should mangle synthesized identifiers

Status: Open.

#6820 In swc-project/swc;

· kdy1 opened on Jan 16, 2023

__lookup_byte_offset_proxy has a memory leak

Status: Open.

#6854 In swc-project/swc;

· kdy1 opened on Jan 25, 2023

Template string is not compressed as possible

C-bug

Status: Open.

#7008 In swc-project/swc;

· rentalhost opened on Mar 4, 2023

Import incorrect polyfills when use Array.prototype.includes and Array.prototype.at

C-bug

Status: Open.

#7083 In swc-project/swc;

· Lancernix opened on Mar 15, 2023

Currently nightly does not provides stack probing

A: plugin

C-bug

Status: Open.

#7239 In swc-project/swc;

· kwonoj opened on Apr 10, 2023

Decorator init order is incorrect

C-bug

Status: Open.

#7404 In swc-project/swc;

· jridgewell opened on May 16, 2023

Deserialize plugin's serialized bytes with bytechecked

A: plugin

enhancement

Status: Open.

#7461 In swc-project/swc;

· kwonoj opened on May 29, 2023

Ability to emit jsdocs ending on previous line instead of same line?

enhancement

Status: Open.

#7492 In swc-project/swc;

· dsherret opened on Jun 5, 2023

[preserveAllComments] Pure annotations are placed in the wrong position

C-bug

Status: Open.

#7735 In swc-project/swc;

· JSerFeng opened on Aug 1, 2023

import name used as a type then locally shadowed as a value causes a compile error

C-bug

Status: Open.

#7899 In swc-project/swc;

· bradzacher opened on Aug 31, 2023

Static property references incorrect class name with es2022 target and keepClassNames enabled

C-bug

Status: Open.

#8039 In swc-project/swc;

· anytinz opened on Oct 1, 2023

Nested arrays cause off-by-one error in generated sourcemaps

C-bug

Status: Open.

#8066 In swc-project/swc;

· marcins opened on Oct 5, 2023

Is there any way to make WASM Plugin output information to JS

A: plugin

enhancement

Status: Open.

#8154 In swc-project/swc;

· littleprincewdk opened on Oct 20, 2023

Emit doesn't add newlines after blocks

C-bug

Status: Open.

#8203 In swc-project/swc;

· lucacasonato opened on Nov 1, 2023

undefined, NaN, and Infinity ident in decl is rewritten

C-bug

Status: Open.

#8336 In swc-project/swc;

· lucacasonato opened on Nov 23, 2023