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Sample

chalk 5.4.1: Configure runtime color formatting and disable ANSI codes in Chalk v5 via chalk.level instead of deprecated chalk.enabled or missing chalk.supportsColor

Verified sample for npm chalk 5.4.1: Configure runtime color formatting and disable ANSI codes in Chalk v5 via chalk.level instead of deprecated…

sha256:525f14e9ff41964b2cf8700329f042389c75335c2b13dc4d12796c1cbb8e0f28

This network offers one thing: a sample that builds. It ran the sample in a sandbox and kept the signed receipt. It grades nothing and warrants nothing — whether the same code builds where you are is not something it measured. How many distinct signing keys filed a passing contract receipt. One is the author alone; more than one means somebody else built it too. A key is self-generated with nothing registered behind it, so it counts keys, not people. MIT-0

Execution evidence

The declared environment and the signed runs are kept apart, so you can see exactly what this sample ran and where.

Evidence basis
Signed contract pass
Verification receipts
2
Signing keys that built it
2
Declared environment node linux x64 node node npm

Verification-run environments

Environment Contract Stages Run
node 22 · linux alpine/x64 · docker ed25519:d91480838ac982c9 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-16
node 22 · linux alpine/x64 · docker ed25519:2175b912ea1c23b1 PASS compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS
CONTAINER_RUN · node-typescript@1
2026-08-18

Case

HOW
Goal
Configure runtime color formatting and disable ANSI codes in Chalk v5 via chalk.level instead of deprecated chalk.enabled or missing chalk.supportsColor
Packages
Symbols
  • chalk
  • Chalk
  • chalk.level
Environment
node
Created
2026-08-16T07:28:33Z

Contract

  1. assert that chalk.enabled is undefined and setting it does not disable ANSI color output
  2. assert that chalk.supportsColor is undefined on the default export
  3. set chalk.level to 0 and assert that chained styles and hex colors return plain unstyled text
  4. set chalk.level to 1 and assert that ANSI escape sequences are restored
  5. assert that Chalk constructor rejects invalid level values with an error

Files

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

Download the source artifact (tar.gz)

Source

NOTES.md
# Notes: Chalk v5 Runtime Color Configuration and `.enabled` / `supportsColor` Removal

### What `search_known_solution` answered
- `search_known_solution` returned existing sample `sha256:5ac46730b5bb5d118cfacbf37a585770c5984e5dd37bc9ffbde2f967ada3a06c` ("Make chalk emit colour codes when output is piped instead of silently producing plain text" using `new Chalk({ level: 1 })`).
- This sample proves a distinct runtime trap: configuring and toggling color formatting at runtime on the default instance via `chalk.level` (0 vs 1..3) after the removal of `chalk.enabled` and migration of `supportsColor`.

### What a model would have written instead
- A model would write `chalk.enabled = false` to disable color output for non-color/logging modes, attempt to read `chalk.supportsColor.level` on the default export, or mutate `process.env.FORCE_COLOR = '0'` at runtime after import.

### How the wrong version fails
- Silently with a green build: `chalk.enabled = false` is an ignored no-op in Chalk v5+ so ANSI escape codes are still silently emitted into plain text logs/pipes, while `chalk.supportsColor.level` throws a loud `TypeError: Cannot read properties of undefined (reading 'level')` because `supportsColor` is now a named export.
csx.json
{"case":{"caseId":"case:sha256:98c694c60153227f5337f26554d41a00a7d9c6e4d96a989386e4acb1d71f5350","contract":["assert that chalk.enabled is undefined and setting it does not disable ANSI color output","assert that chalk.supportsColor is undefined on the default export","set chalk.level to 0 and assert that chained styles and hex colors return plain unstyled text","set chalk.level to 1 and assert that ANSI escape sequences are restored","assert that Chalk constructor rejects invalid level values with an error"],"goal":"Configure runtime color formatting and disable ANSI codes in Chalk v5 via chalk.level instead of deprecated chalk.enabled or missing chalk.supportsColor","kind":"HOW","packages":["pkg:npm/chalk@5.4.1"],"schemaVersion":1,"symbols":["chalk","Chalk","chalk.level"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","ecosystem":"npm","executionContext":"node","language":"node","os":"linux","packageManager":"npm","runtime":"node","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/chalk@5.4.1"],"schemaVersion":1,"symbols":["chalk","Chalk","chalk.level"],"verifierAdapter":"node-typescript@1"}
package-lock.json
{
  "name": "csx-sample-chalk-runtime-level",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "csx-sample-chalk-runtime-level",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "chalk": "5.4.1"
      }
    },
    "node_modules/chalk": {
      "version": "5.4.1",
      "resolved": "https://registry.npmjs.org/chalk/-/chalk-5.4.1.tgz",
      "integrity": "sha512-zgVZuo2WcZgfUEmsn6eO3kINexW8RAE4maiQ8QNs8CtpPCSyMiYsULR3HQYkm3w8FIA3SberyMJMSldGsW+U3w==",
      "license": "MIT",
      "engines": {
        "node": "^12.17.0 || ^14.13 || >=16.0.0"
      },
      "funding": {
        "url": "https://github.com/chalk/chalk?sponsor=1"
      }
    }
  }
}
package.json
{
  "name": "csx-sample-chalk-runtime-level",
  "version": "1.0.0",
  "private": true,
  "type": "module",
  "license": "MIT-0",
  "dependencies": {
    "chalk": "5.4.1"
  }
}
src/index.mjs
import chalk, { Chalk } from 'chalk';

/**
 * Configure color output level dynamically at runtime on the default chalk instance.
 *
 * In Chalk v5+, `chalk.enabled` was removed; assigning to it is a silent no-op.
 * Setting `chalk.level = 0` disables all ANSI escape codes and returns plain text.
 * Setting `chalk.level = 1..3` enables basic ANSI (1), 256-color (2), or TrueColor (3).
 *
 * @param {number} level - Color support level (0 = off, 1 = 16-color, 2 = 256-color, 3 = 16m TrueColor)
 */
export function setColorLevel(level) {
  if (!Number.isInteger(level) || level < 0 || level > 3) {
    throw new RangeError('Chalk color level must be an integer between 0 and 3');
  }
  chalk.level = level;
}

/**
 * Format an error message using chained styling.
 * @param {string} msg
 * @returns {string}
 */
export function formatError(msg) {
  return chalk.red.bold(msg);
}

/**
 * Format a badge message using hex truecolor/downsampled styling.
 * @param {string} text
 * @returns {string}
 */
export function formatBadge(text) {
  return chalk.hex('#FFA500')(text);
}
test/contract.mjs
import { strict as assert } from 'node:assert';
import chalk, { Chalk } from 'chalk';
import { setColorLevel, formatError, formatBadge } from '../src/index.mjs';

// TRAP 1: In Chalk v5+, `chalk.enabled` was removed.
// Setting `chalk.enabled = false` is a silent no-op and does NOT disable styling.
assert.equal(chalk.enabled, undefined, 'chalk.enabled is undefined in Chalk v5+');
chalk.enabled = false;
chalk.level = 1;
const styledWithEnabledFalse = chalk.red('fail');
assert.equal(
  styledWithEnabledFalse,
  '\u001b[31mfail\u001b[39m',
  'chalk.enabled = false silently fails to disable ANSI color in Chalk v5+'
);

// TRAP 2: `chalk.supportsColor` is undefined on the default instance (it is a named export).
assert.equal(
  chalk.supportsColor,
  undefined,
  'chalk.supportsColor is undefined on default export; must import as named export { supportsColor }'
);

// SOLUTION: The single setting controlling runtime styling on the shared instance is `chalk.level` (0-3).

// Level 0 turns off all ANSI escape codes and returns plain text strings.
setColorLevel(0);
assert.equal(chalk.level, 0);
assert.equal(formatError('system failure'), 'system failure');
assert.equal(formatBadge('WARN'), 'WARN');
assert.ok(!formatError('system failure').includes('\u001b['));

// Level 1 re-enables basic ANSI escape codes across chained styles.
setColorLevel(1);
assert.equal(chalk.level, 1);
assert.equal(formatError('system failure'), '\u001b[31m\u001b[1msystem failure\u001b[22m\u001b[39m');
assert.ok(formatError('system failure').includes('\u001b[31m'));

// Level out of bounds is rejected by Chalk options validation.
assert.throws(
  () => new Chalk({ level: 4 }),
  /The `level` option should be an integer from 0 to 3/
);

console.log('CONTRACT PASS: chalk.level is the sole runtime switch for color formatting');

Origin Seeder

csx-seed