ECMAScript Module Harmony
Module Harmony とは 現在 TC39 で多くのモジュール機能を追加する提案が進行しています。かつてはそれぞれの提案が無秩序に進行していましたが、2023年5月に Module Harmony として整理されました。この記事ではそれら提案についてまとめようと思います。 モジュール提案仕様の依存関係 インポートフェーズ修飾子 モジュールの読み込みがフェーズに分けられ、それぞれに対して修飾子が提案されています。シンタックスとしては import の後ろに修飾子を付けます。 import <Modifier> <ImportBinding> from <ModuleSpecifier>; import.<Modifier>(<AssignmentExpression>); モジュールの各フェーズと修飾子の対応 アセット参照 URL やパス解決のみをするのがアセット参照です。Asset
TypeScriptのmoduleオプションの話、あるいはTypeScript開発者の苦悩、あるいはCJSとESMの話
GitHub - johnloy/esm-commonjs-interop-manual
Interop between ECMAScript modules, aka ES modules, aka ESM, aka JavaScript modules, and CommonJS, aka CJS, modules is a complicated and confusing matter most JavaScript developers no doubt don't want to have to think about. There are more mission-critical things on which to spend time and brain cycles, namely application logic. Still, it's consequential in the modern JS ecosystem for two reasons:
The ESM move · sindresorhus/meta · Discussion #15
At the end of April, Node.js 10 goes out of LTS, which means I can target Node.js 12 in my packages. Node.js 12 has full ESM support! Required reading: https://nodejs.org/api/esm.html I plan to migrate most of my (1K+) packages to ESM within 2021. At the start of April, I will begin with some less popular packages, just to test the waters. I will use "type": "module" in package.json and not .mjs.
Dynamic Import Support in Closure Compiler - Design Document
Dynamic Import Support in Closure Compiler - Design Document 共有ログインお使いのブラウザのバージョンはサポートが終了しました。 サポートされているブラウザにアップグレードしてください。閉じる ファイル編集表示ツールヘルプユーザー補助機能デバッグ
ESM-CJS interop test
ESM-CJS interop test Test Cases Results Node.js Babel Webpack Rollup.js Parcel esbuild Results by test case Results by syntax import x and similar import { named } and similar import { __esModule } and similar import * and similar import() and similar require().default and similar require().named and similar require().__esModule and similar require() and similar Direct differences Webpack <-> Node
GitHub - guybedford/es-module-lexer: Low-overhead lexer dedicated to ES module parsing for fast analysis
import { init, parse } from 'es-module-lexer'; (async () => { await init; const source = ` import { name } from 'mod\\u1011'; import json from './json.json' assert { type: 'json' } export var p = 5; export function q () { }; export { x as 'external name' } from 'external'; // Comments provided to demonstrate edge cases import /*comment!*/ ( 'asdf', { assert: { type: 'json' }}); import /*comment!*/
GitHub - getify/moduloze: Convert CommonJS (CJS) modules to UMD and ESM formats
Moduloze enables authoring JS modules in the CommonJS (CJS) format that's native to the Node.js ecosystem, and converting those modules to Universal Module Definition (UMD) and ES Modules (ESM) formats. UMD is particularly useful in browsers where ESM is not already being used in the application. CJS continues to work fully in all versions of Node, but in the latest Node versions, the ESM format f
JSPM - jspm.dev Release
Guy Bedford, June 19th 2020 The latest version of the jspm CDN, https://jspm.dev has been launched today as the new replacement for https://dev.jspm.io. jspm.dev allows directly importing any package from npm into the browser using only native ECMAScript module import semantics like import('https://jspm.dev/pkgname'). As of today, dev.jspm.io serves 6 million requests to over 150,000 users each mo
Snowpack
Update (April 20, 2022): Snowpack is no longer actively maintained and is not recommended for new projects. Check out Vite for a well-maintained Snowpack alternative. See also: esbuild, parcel What is Snowpack?Snowpack is a lightning-fast frontend build tool, designed for the modern web. It is an alternative to heavier, more complex bundlers like webpack or Parcel in your development workflow. Sno
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Problems with Node.js `--experimental-detect-module` · Issue #56678 · microsoft/TypeScript
Rule `import/no-unresolved` raise false positive when there is no `main` field in the `package.json` · Issue #2132 · import-js/eslint-plugin-import
GitHub - vercel/nft: Node.js dependency tracing utility
Reland JSON module scripts by dandclark · Pull Request #5658 · whatwg/html
GitHub - egoist/tsup: The simplest and fastest way to bundle your TypeScript libraries.
Bundling and JavaScript
Add a new pass to convert output chunks to ES Modules by ChadKillingsworth · Pull Request #3367 · google/closure-compiler
GitHub - nodejs/cjs-module-lexer: Fast lexer to extract named exports via analysis from CommonJS modules
Native ESM in Node.js w/ require() fallbacks and support for all front end compilers!
modules/doc/meetings/2019-12-18.md at main · nodejs/modules