Initial JS project

.github/workflows/ci.yml

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+name: CI
+on:
+  pull_request:
+  push:
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: npm i
+      - run: npm run lint
+
+  typecheck:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: npm i
+      - run: npx tsc
+
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - run: npm i
+      - run: npm run coverage

.gitignore

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+coverage
+node_modules
+package-lock.json
+dist
+*.tgz

LICENSE

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+The MIT License (MIT)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

eslint.config.js

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+import javascript from '@eslint/js'
+import jsdoc from 'eslint-plugin-jsdoc'
+
+export default [
+  {
+    plugins: {
+      jsdoc,
+    },
+
+    languageOptions: {
+      globals: {
+        'atob': false,
+      },
+    },
+
+    rules: {
+      ...javascript.configs.recommended.rules,
+      'arrow-spacing': 'error',
+      camelcase: 'off',
+      'comma-spacing': 'error',
+      'comma-dangle': ['error', {
+        arrays: 'always-multiline',
+        objects: 'always-multiline',
+        imports: 'always-multiline',
+        exports: 'always-multiline',
+        functions: 'never',
+      }],
+      'eol-last': 'error',
+      eqeqeq: 'error',
+      'func-style': ['error', 'declaration'],
+      indent: ['error', 2],
+      'jsdoc/check-param-names': 'error',
+      'jsdoc/check-property-names': 'error',
+      'jsdoc/check-tag-names': 'error',
+      'jsdoc/require-param': 'error',
+      'jsdoc/require-param-type': 'error',
+      'jsdoc/require-returns': 'error',
+      'jsdoc/require-returns-type': 'error',
+      'jsdoc/sort-tags': 'error',
+      'no-constant-condition': 'off',
+      'no-extra-parens': 'error',
+      'no-multi-spaces': 'error',
+      'no-trailing-spaces': 'error',
+      'no-undef': 'error',
+      'no-unused-vars': 'error',
+      'no-useless-concat': 'error',
+      'no-useless-rename': 'error',
+      'no-useless-return': 'error',
+      'no-var': 'error',
+      'object-curly-spacing': ['error', 'always'],
+      'prefer-const': 'error',
+      'prefer-promise-reject-errors': 'error',
+      quotes: ['error', 'single'],
+      'require-await': 'warn',
+      semi: ['error', 'never'],
+      'sort-imports': ['error', {
+        ignoreDeclarationSort: true,
+        ignoreMemberSort: false,
+        memberSyntaxSortOrder: ['none', 'all', 'multiple', 'single'],
+      }],
+      'space-infix-ops': 'error',
+    },
+  },
+]

package.json

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+{
+  "name": "hyparquet-writer",
+  "version": "0.1.0",
+  "description": "Parquet file writer for JavaScript",
+  "author": "Hyperparam",
+  "homepage": "https://hyperparam.app",
+  "keywords": [
+    "hyparquet",
+    "parquet"
+  ],
+  "license": "MIT",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/hyparam/hyparquet-writer.git"
+  },
+  "main": "src/index.js",
+  "files": [
+    "src"
+  ],
+  "type": "module",
+  "types": "src/index.d.ts",
+  "scripts": {
+    "coverage": "vitest run --coverage",
+    "lint": "eslint",
+    "lint:fix": "eslint --fix",
+    "test": "vitest run"
+  },
+  "devDependencies": {
+    "@babel/eslint-parser": "7.26.10",
+    "@types/node": "22.13.10",
+    "@vitest/coverage-v8": "3.0.9",
+    "eslint": "9.22.0",
+    "eslint-plugin-jsdoc": "50.6.8",
+    "hyparquet": "1.9.1",
+    "typescript": "5.8.2",
+    "vitest": "3.0.9"
+  }
+}

test/package.test.js

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+import { describe, expect, it } from 'vitest'
+import packageJson from '../package.json' with { type: 'json' }
+
+describe('package.json', () => {
+  it('should have the correct name', () => {
+    expect(packageJson.name).toBe('hyparquet-writer')
+  })
+  it('should have a valid version', () => {
+    expect(packageJson.version).toMatch(/^\d+\.\d+\.\d+$/)
+  })
+  it('should have MIT license', () => {
+    expect(packageJson.license).toBe('MIT')
+  })
+  it('should have precise dev dependency versions', () => {
+    const { devDependencies } = packageJson
+    Object.values(devDependencies).forEach(version => {
+      expect(version).toMatch(/^\d+\.\d+\.\d+$/)
+    })
+  })
+  it('should have no dependencies', () => {
+    expect('dependencies' in packageJson).toBe(false)
+    expect('peerDependencies' in packageJson).toBe(false)
+  })
+})

tsconfig.json

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+{
+  "compilerOptions": {
+    "allowJs": true,
+    "checkJs": true,
+    "lib": ["esnext", "dom"],
+    "module": "nodenext",
+    "noEmit": true,
+    "resolveJsonModule": true,
+    "skipLibCheck": false,
+    "strict": true,
+    "target": "esnext"
+  },
+  "include": ["src", "test"]
+}