entities 6.0.1: decodeStrict

audit=false

Clean-room public code sample — generation instructions

Write a brand-new, minimal, self-contained code sample in this clean-room directory.
Do not copy, paraphrase, or reference any existing project source. Work only from this spec.

A csx.json manifest scaffold already exists. Do not recreate it from memory. Preserve its case.goal, packages and symbols; fill its empty case.contract with exact assertions and correct its environment, commands and verifierAdapter for the files you generate.

Goal: verify entities.decodeStrict in pkg:npm/entities@6.0.1
Kind: HOW

Use EXACTLY these public packages and versions:
  - pkg:npm/entities@6.0.1
Demonstrate these symbols/APIs:
  - entities.decodeStrict

Rules:
  - One focused purpose; the smallest project that proves the goal.
  - Include a contract test (test/contract.*) that runs OFFLINE and exits 0 exactly when the goal behavior works.
  - Pin every dependency with a lockfile so resolution is reproducible.
  - No secrets, credentials, or tokens. No real URLs (only example.com or localhost). No absolute paths.
  - No personal names, emails, company names, or project identifiers of any kind.
  - No binaries and no generated output (node_modules, dist, target, venv, .git, .env).
  - Keep it under 200 files and 256KB packed.

{"case":{"caseId":"case:sha256:15fd38d000742d059e33869fe41f4cd6ed65b3f69c886123cabd8de02a231a70","contract":["decodeStrict decodes standard XML and numeric character references terminated with semicolons by default","decodeStrict leaves unterminated entity references unparsed by default","decodeStrict decodes named and numeric HTML character references when level is HTML","decodeStrict strictly requires semicolons for HTML entities preventing legacy unclosed entity parsing","decodeStrict preserves unrecognized entity references unchanged"],"goal":"verify entities.decodeStrict in pkg:npm/entities@6.0.1","kind":"HOW","packages":["pkg:npm/entities@6.0.1"],"schemaVersion":1,"symbols":["entities.decodeStrict"]},"contractCommand":["node","test/contract.mjs"],"environment":{"arch":"x64","distro":"ubuntu","ecosystem":"npm","language":"javascript","libc":"glibc","libcVersion":"2.39","moduleSystem":"esm","os":"linux","osVersionBucket":"24","packageManager":"npm","packageManagerVersion":"10.9.8","runtime":"node","runtimeVersion":"22.23.2","schemaVersion":1},"license":"MIT-0","packages":["pkg:npm/entities@6.0.1"],"schemaVersion":1,"subject":"pkg:npm/entities@6.0.1","symbols":["entities.decodeStrict"],"verifierAdapter":"node-typescript@1"}

{
  "name": "sample-entities",
  "version": "1.0.0",
  "lockfileVersion": 3,
  "requires": true,
  "packages": {
    "": {
      "name": "sample-entities",
      "version": "1.0.0",
      "license": "MIT-0",
      "dependencies": {
        "entities": "6.0.1"
      }
    },
    "node_modules/entities": {
      "version": "6.0.1",
      "resolved": "https://registry.npmjs.org/entities/-/entities-6.0.1.tgz",
      "integrity": "sha512-aN97NXWF6AWBTahfVOIrB/NShkzi5H7F9r1s9mD3cDj4Ko5f2qhhVoYMibXF7GlLveb/D2ioWay8lxI97Ven3g==",
      "license": "BSD-2-Clause",
      "engines": {
        "node": ">=0.12"
      },
      "funding": {
        "url": "https://github.com/fb55/entities?sponsor=1"
      }
    }
  }
}

{
  "name": "sample-entities",
  "version": "1.0.0",
  "type": "module",
  "private": true,
  "description": "verify entities.decodeStrict in pkg:npm/entities@6.0.1",
  "main": "src/index.mjs",
  "license": "MIT-0",
  "dependencies": {
    "entities": "6.0.1"
  }
}

{
  "schemaVersion": 1,
  "goal": "verify entities.decodeStrict in pkg:npm/entities@6.0.1",
  "kind": "HOW",
  "packages": [
    "pkg:npm/entities@6.0.1"
  ],
  "symbols": [
    "entities.decodeStrict"
  ]
}

import { decodeStrict, EntityLevel, DecodingMode } from 'entities';

/**
 * Decodes XML or HTML entities strictly requiring trailing semicolons.
 *
 * @param {string} input - The string containing entities to decode.
 * @param {import('entities').DecodingOptions | import('entities').EntityLevel} [options] - Decoding options or entity level.
 * @returns {string} The decoded string.
 */
export function decodeStrictText(input, options) {
  return decodeStrict(input, options);
}

export { decodeStrict, EntityLevel, DecodingMode };
export default decodeStrict;

import assert from 'node:assert/strict';
import { decodeStrict, EntityLevel, decodeStrictText } from '../src/index.mjs';

// 1. decodeStrict decodes standard XML and numeric character references terminated with semicolons by default
{
  assert.equal(decodeStrict('&amp; &lt; &gt; &quot; &apos;'), '& < > " \'');
  assert.equal(decodeStrict('&#38; &#x26; &#60; &#x3C;'), '& & < <');
  assert.equal(decodeStrictText('Plain text &amp; entities'), 'Plain text & entities');
}

// 2. decodeStrict leaves unterminated entity references unparsed by default
{
  assert.equal(decodeStrict('&amp'), '&amp');
  assert.equal(decodeStrict('&lt'), '&lt');
  assert.equal(decodeStrict('&#38'), '&#38');
  assert.equal(decodeStrict('&amp; followed by &amp'), '& followed by &amp');
}

// 3. decodeStrict decodes named and numeric HTML character references when level is HTML
{
  assert.equal(decodeStrict('&copy; &euro; &trade;', EntityLevel.HTML), '© € ™');
  assert.equal(decodeStrict('&#169; &#x20AC;', { level: EntityLevel.HTML }), '© €');
}

// 4. decodeStrict strictly requires semicolons for HTML entities preventing legacy unclosed entity parsing
{
  assert.equal(decodeStrict('&copy 2026', EntityLevel.HTML), '&copy 2026');
  assert.equal(decodeStrict('&copy 2026', { level: EntityLevel.HTML }), '&copy 2026');
}

// 5. decodeStrict preserves unrecognized entity references unchanged
{
  assert.equal(decodeStrict('&unknown; &invalid;'), '&unknown; &invalid;');
  assert.equal(decodeStrict('&notanentity; in text', EntityLevel.HTML), '&notanentity; in text');
}