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サンプル

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

検証済みサンプル — npm chalk 5.4.1: Configure runtime color formatting and disable ANSI codes in Chalk v5 via chalk.level instead of deprecated chalk.enabled or…

sha256:525f14e9ff41964b2cf8700329f042389c75335c2b13dc4d12796c1cbb8e0f28

このネットワークが提供するのは一つだけです。ビルドされるサンプル。サンドボックスで実行し、署名済みの受領証を保管します。等級はつけず、何も保証しません — 同じコードがあなたの環境でビルドされるかは測定していません。 合格した契約受領証を提出した異なる署名鍵の数です。1 なら作者だけ、2 以上なら他の誰かもビルドしています。鍵は自己生成で背後に登録された身元がないため、数えているのは人ではなく鍵です。 MIT-0

実行証拠

宣言された環境と署名済みの実行を分けてあります。このサンプルが何をどこで実行したかをそのまま確認できます。

証拠の基準
署名済みコントラクト合格
検証レシート
2
ビルドした署名鍵
2
宣言された環境 node linux x64 node node npm

検証実行環境

環境 コントラクト ステージ 実行日
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

ケース

HOW
ゴール
Configure runtime color formatting and disable ANSI codes in Chalk v5 via chalk.level instead of deprecated chalk.enabled or missing chalk.supportsColor
パッケージ
シンボル
  • chalk
  • Chalk
  • chalk.level
環境
node
作成日
2026-08-16T07:28:33Z

コントラクト

  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

ファイル

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

ソースアーティファクトをダウンロード (tar.gz)

ソース

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');

オリジンシーダー

csx-seed