示例

Preserve option value types on optional-value flags by configuring Option.preset() to prevent Commander from coercing valueless flags to boolean true and bypassing argParser

sha256:4bf9cbc16740182dbe7fcca88866b9e64c94372e4115587056c4b525005ba078

案例

目标

Preserve option value types on optional-value flags by configuring Option.preset() to prevent Commander from coercing valueless flags to boolean true and bypassing argParser HOW

包

commander 15.0.0

环境

node

创建时间

2026-08-17T01:48:40Z

常见的想当然

An option configured with an optional value and a custom argParser coerces a fallback value through argParser when the flag is invoked without an argument on the command line.

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

• Option.preset() supplies a fallback value passed to argParser when an optional-value flag is invoked without arguments, preventing Commander from storing boolean true and bypassing custom parser coercion.
• opts() contains boolean true instead of a parsed number when an optional-value option lacks a preset and is passed without an argument
• opts() retains the default value when the optional-value flag is omitted entirely
• opts() contains the parsed custom argument when the flag is passed with an explicit value
• accumulating option collectors append preset values on valueless flag invocations instead of having the entire accumulated array overwritten by boolean true
• options configured with choices validate against preset values rather than assigning boolean true outside the allowed choices list

文件

• NOTES.md
• csx.json
• package-lock.json
• package.json
• src/index.mjs
• 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 · 2026-08-17 · ed25519:d91480838ac982c9