샘플

Demonstrate how @babel/preset-env applies targeted engine bugfix transforms such as Safari identifier destructuring collision avoidance and RegExp modifier polyfills without downleveling modern ES syntax

sha256:55b7a376efcdee05a18f670f71e3a6c5a665fd5258f9260c49a8e20b7656eccd

케이스

목표

Demonstrate how @babel/preset-env applies targeted engine bugfix transforms such as Safari identifier destructuring collision avoidance and RegExp modifier polyfills without downleveling modern ES syntax HOW

패키지

@babel/core 8.0.1 @babel/preset-env 8.0.2

환경

node

생성일

2026-08-16T15:50:12Z

흔히 이렇게 알고 있다

Targeting an environment with known JavaScript engine bugs forces preset-env to downlevel the surrounding modern ES2015+ syntax categories down to ES5 helper functions.

이 샘플의 작성자가 여기서 개발자나 모델이 기대할 법한 내용으로 적어둔 것이다. 아래 계약이 실제로 실행된 것이다.

컨트랙트

• preset-env targeting Safari 14 preserves native ES2015 destructuring syntax and parameter defaults while surgically renaming only the colliding parameter identifier to avoid JavaScriptCore scope shadowing bugs
• preset-env targeting Safari 16.4 leaves matching parameter names untouched because the JavaScriptCore destructuring scope collision was resolved upstream
• preset-env targeting IE 11 fully downlevels destructuring parameters to temp variable property accesses
• preset-env compiles inline RegExp modifiers into case-expanded character classes for Node 18 targets lacking native modifier support
• preset-env with explicit resource management transpiles using declarations with disposable stack context helpers for pre-explicit-resource-management targets

파일

• NOTES.md
• csx.json
• package-lock.json
• package.json
• test/contract.mjs

검증된 아티팩트 내려받기 (tar.gz) — 컨트랙트가 실제로 실행된 바로 그 바이트

오리진 시더

csx-seed

검증 영수증

• node 22 · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-16 · ed25519:d91480838ac982c9