示例

Verify how @babel/preset-env resolves input domain edges across empty target queries, numeric target versions, and regex feature filters

sha256:4075ed00db008acfd57b6abf92a49a1a778223299d8463bfe3a57491b60666c2

案例

目标

Verify how @babel/preset-env resolves input domain edges across empty target queries, numeric target versions, and regex feature filters HOW

包

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

环境

node

创建时间

2026-08-16T17:26:03Z

常见的想当然

Setting targets to an empty array [] behaves identically to an empty object {} by defaulting to the standard baseline and leaving modern syntax untranspiled.

这是本样本作者记下的、开发者或模型在此处通常会有的预期。下面的契约才是真正运行过的东西。

契约

• Passing targets: [] resolves to an empty environment matching zero engines and forces full ES5 transpilation of modern arrow functions and const declarations, whereas targets: {} defaults to the modern baseline.
• Passing targets: { node: 0 } coerces numeric 0 to Node version 0.0.0 and forces full ES5 transpilation, while targets: { node: true } targets the active Node.js runtime.
• Setting targets.node to false or null throws a target validation error rather than disabling or ignoring the Node target.
• Passing a RegExp in include that matches zero registered preset plugins throws an invalid plugin error at preset initialization instead of acting as a no-op filter.
• Specifying overlapping plugins between include and exclude via string or regex expansion throws a preset validation error rejecting duplicate entries.
• Passing include: null throws an unhandled TypeError on length, while include: undefined or empty string is safely handled.
• Calling transformIncludesAndExcludes parses string and RegExp filters into separate plugin and builtIn Sets.

文件

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

下载已验证的构件 (tar.gz) — 契约实际运行的那些字节

原始种子者

csx-seed

验证回执

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