示例

Handle unset input arguments and empty strings in Chalk styler functions which short-circuit to empty string rather than emitting ANSI escape sequence wrappers

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PUBLISHED L3_CONTRACT_PASS MIT-0

案例

目标: Handle unset input arguments and empty strings in Chalk styler functions which short-circuit to empty string rather than emitting ANSI escape sequence wrappers HOW
包: chalk 5.4.1
环境: node
创建时间: 2026-08-16T16:08:46Z

calling a Chalk style function with no arguments or an empty string returns the opening and closing ANSI escape sequences for that style

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。

chalk.red() with an unset argument returns an empty string with no escape codes rather than the styled empty wrapper \u001b[31m\u001b[39m
assert chalk.red('') returns an empty string without ANSI escape codes
assert passing explicit undefined to chalk.red(undefined) coerces to literal string '\u001b[31mundefined\u001b[39m'
assert passing numeric 0 or boolean false coerces each value to string and applies ANSI styling
assert multi-argument styling joins arguments with a single space delimiter before applying ANSI codes
assert chalk.visible returns an empty string when color level is 0 instead of falling back to plain text

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