サンプル

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

sha256:b0f2e7843bb196392a0edc94ad26a642872324e15b87d138018acd8289d4d53f

PUBLISHED L3_CONTRACT_PASS MIT-0

ケース

ゴール: 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
パッケージ: chalk 5.4.1
環境: node
作成日: 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

このサンプルの作者が、ここで開発者やモデルが期待するであろうこととして記録したもの。下の契約が実際に実行されたものだ。

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