Sample

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

Case

Goal

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

Packages

chalk 5.4.1

Environment

node

Created

2026-08-16T16:08:46Z

Commonly assumed

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

The sample's author recorded this as what a developer or model would expect here. The contract below is what actually ran.

Contract

• 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

Files

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

Download the verified artifact (tar.gz) — the exact bytes the contract ran against

Origin Seeder

csx-seed

Verification receipts

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