ESM Support

.eslintrc.json

@@ -1,8 +1,6 @@
 {
-  "extends": "airbnb-base",
-  "plugins": [
-    "jest"
-  ],
+  "extends": ["@sxzz/eslint-config-ts", "@sxzz/eslint-config-prettier"],
+  "plugins": ["jest"],
   "env": {
     "jest/globals": true
   },
@@ -11,34 +9,21 @@
     "dayjs": true
   },
   "rules": {
-    "semi": [
-      2,
-      "never"
-    ],
-    "comma-dangle": [
-      "error",
-      "never"
-    ],
-    "no-param-reassign": [
-      0
-    ],
-    "func-names": [
-      0
-    ],
-    "import/no-extraneous-dependencies": [
-      0
-    ],
-    "import/no-unresolved": [
-      2,
-      {
-        "ignore": [
-          "dayjs"
-        ]
+    "unicorn/better-regex": "off",
+    "eslint-comments/no-unlimited-disable": "off",
+    "@typescript-eslint/triple-slash-reference": "off",
+    "unicorn/prefer-node-protocol": "off"
+  },
+  "overrides": [
+    {
+      "files": ["src/**"],
+      "rules": {
+        "unicorn/prefer-includes": "off",
+        "unicorn/no-for-loop": "off",
+        "unicorn/prefer-number-properties": "off",
+        "unicorn/no-instanceof-array": "off",
+        "unicorn/explicit-length-check": "off"
       }
-    ],
-    "import/extensions": [
-      2,
-      "never"
-    ]
-  }
+    }
+  ]
 }

.github/ISSUE_TEMPLATE/--bug-report.md

@@ -4,7 +4,6 @@ about: Create a report to help us improve
 title: ''
 labels: ''
 assignees: ''
-
 ---
 
 **Describe the bug**
@@ -14,7 +13,8 @@ A clear and concise description of what the bug is.
 A clear and concise description of what you expected to happen.
 
 **Information**
- - Day.js Version [e.g. v1.0.0]
- - OS: [e.g. iOS]
- - Browser [e.g. chrome 62]
- - Time zone: [e.g. GMT-07:00 DST (Pacific Daylight Time)]
+
+- Day.js Version [e.g. v1.0.0]
+- OS: [e.g. iOS]
+- Browser [e.g. chrome 62]
+- Time zone: [e.g. GMT-07:00 DST (Pacific Daylight Time)]

.github/workflows/check.yml

@@ -1,26 +1,36 @@
 name: Lint & Unit Test
 on:
   push:
-    branches: [ master, dev ]
+    branches: [master, dev]
   pull_request:
     branches: [dev]
 jobs:
   check:
     runs-on: ubuntu-latest
+
     strategy:
+      fail-fast: false
       matrix:
-        node: [ 12, 14, 16, 18 ]
+        node: [14.19, 16, 18]
+
     steps:
-    - name: Checkout
-      uses: actions/checkout@v3
-    - name: Setup node
-      uses: actions/setup-node@v3
-      with:
-        node-version: ${{ matrix.node-version }}
-        cache: 'npm'
-    - name: Install dependencies
-      run: npm install -g codecov && npm install
-    - name: Run Lint
-      run: npm run lint
-    - name: Run tests
-      run: npm test && codecov 
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - uses: pnpm/action-setup@v2
+        name: Install pnpm
+
+      - name: Setup node
+        uses: actions/setup-node@v3
+        with:
+          node-version: ${{ matrix.node-version }}
+          cache: pnpm
+
+      - name: Install dependencies
+        run: pnpm install -g codecov && pnpm install
+
+      - name: Run Lint
+        run: pnpm run lint
+
+      - name: Run tests
+        run: pnpm test && codecov

.gitignore

@@ -13,12 +13,8 @@ yarn.lock
 coverage
 
 # build
-/locale
-/plugin
-/dayjs.min.js
-/esm
-/index.d.ts
-locale.json
+dist
 
 #dev
 demo.js
+.eslintcache

.npmrc

@@ -0,0 +1 @@
+shamefully-hoist = true

.prettierignore

@@ -0,0 +1,3 @@
+node_modules
+dist
+pnpm-lock.yaml

.prettierrc

@@ -0,0 +1,4 @@
+{
+  "semi": false,
+  "singleQuote": true
+}

.travis.yml

@@ -16,8 +16,8 @@ script:
   - codecov
 after_success:
   - if [ "$TRAVIS_BRANCH" == "master" ] && [ "${TRAVIS_PULL_REQUEST}" == "false" ]; then
-      npx travis-deploy-once --pro && npm run build && npm run babel && npm install -g @semantic-release/changelog @semantic-release/git  semantic-release && semantic-release && echo release success && curl ${TriggerUrl} && npm run test:sauce;
+    npx travis-deploy-once --pro && npm run build && npm run babel && npm install -g @semantic-release/changelog @semantic-release/git  semantic-release && semantic-release && echo release success && curl ${TriggerUrl} && npm run test:sauce;
     fi
 branches:
-  only: 
+  only:
     - master

CONTRIBUTING.md

@@ -6,19 +6,19 @@ Our open source community strives to be nice, welcoming and professional. Instan
 
 ## Style
 
-* Day.js is written in ES6.
-* We use ESLint to check our code. You can use `npm run lint` before submitting a pull request.
-* Please use semantic commit message.
+- Day.js is written in ES6.
+- We use ESLint to check our code. You can use `npm run lint` before submitting a pull request.
+- Please use semantic commit message.
 
 ## Bugs
 
-* Before submitting a bug report, search the issues for similar tickets. Your issue may have already been discussed and resolved. 
-* Feel free to add a comment to an existing issue, even if it's closed.
-* Be thorough in your title and report, don't leave out important details.
-* English, please.
+- Before submitting a bug report, search the issues for similar tickets. Your issue may have already been discussed and resolved.
+- Feel free to add a comment to an existing issue, even if it's closed.
+- Be thorough in your title and report, don't leave out important details.
+- English, please.
 
 ## Tests
 
-* Feel free to create a new `test/*.test.js` file if none of the existing test files suits your test case.
-* Help us keeping 100% test coverage :D.
-* You can use `npm run test` before submitting a pull request.
+- Feel free to create a new `test/*.test.js` file if none of the existing test files suits your test case.
+- Help us keeping 100% test coverage :D.
+- You can use `npm run test` before submitting a pull request.

README.md

@@ -5,8 +5,8 @@ English | [简体中文](./docs/zh-cn/README.zh-CN.md) | [日本語](./docs/ja/R
                                                                              alt="Day.js"></a></p>
 <p align="center">Fast <b>2kB</b> alternative to Moment.js with the same modern API</p>
 <p align="center">
-    <a href="https://unpkg.com/dayjs/dayjs.min.js"><img
-            src="https://img.badgesize.io/https://unpkg.com/dayjs/dayjs.min.js?compression=gzip&style=flat-square"
+    <a href="https://unpkg.com/dayjs"><img
+            src="https://img.badgesize.io/dayjs?compression=gzip&style=flat-square"
             alt="Gzip Size"></a>
     <a href="https://www.npmjs.com/package/dayjs"><img src="https://img.shields.io/npm/v/dayjs.svg?style=flat-square&colorB=51C838"
                                                        alt="NPM Version"></a>
@@ -25,15 +25,19 @@ English | [简体中文](./docs/zh-cn/README.zh-CN.md) | [日本語](./docs/ja/R
 > Day.js is a minimalist JavaScript library that parses, validates, manipulates, and displays dates and times for modern browsers with a largely Moment.js-compatible API. If you use Moment.js, you already know how to use Day.js.
 
 ```js
-dayjs().startOf('month').add(1, 'day').set('year', 2018).format('YYYY-MM-DD HH:mm:ss');
+dayjs()
+  .startOf('month')
+  .add(1, 'day')
+  .set('year', 2018)
+  .format('YYYY-MM-DD HH:mm:ss')
 ```
 
-* 🕒 Familiar Moment.js API & patterns
-* 💪 Immutable
-* 🔥 Chainable
-* 🌐 I18n support
-* 📦 2kb mini library
-* 👫 All browsers supported
+- 🕒 Familiar Moment.js API & patterns
+- 💪 Immutable
+- 🔥 Chainable
+- 🌐 I18n support
+- 📦 2kb mini library
+- 👫 All browsers supported
 
 ---
 
@@ -82,6 +86,7 @@ dayjs.locale('es') // use Spanish locale globally
 
 dayjs('2018-05-05').locale('zh-cn').format() // use Chinese Simplified locale in a specific instance
 ```
+
 📚[Internationalization](https://day.js.org/docs/en/i18n/i18n)
 
 ### Plugin
@@ -100,7 +105,7 @@ dayjs().format('Q Do k kk X x') // more available formats
 
 ## Sponsors
 
-Support this project by becoming a sponsor. Your logo will show up here with a link to your website. 
+Support this project by becoming a sponsor. Your logo will show up here with a link to your website.
 
 [[Become a sponsor via Github](https://github.com/sponsors/iamkun/)] [[Become a sponsor via OpenCollective](https://opencollective.com/dayjs#sponsor)]
 

babel.config.js

@@ -1,20 +1,18 @@
 module.exports = {
   env: {
     test: {
-      presets: [
-        '@babel/preset-env'
-      ]
+      presets: ['@babel/preset-env'],
     },
     build: {
       presets: [
         [
           '@babel/preset-env',
           {
             modules: false,
-            loose: true
-          }
-        ]
-      ]
-    }
-  }
+            loose: true,
+          },
+        ],
+      ],
+    },
+  },
 }

build/esm.mjs

@@ -0,0 +1,46 @@
+import { resolve } from 'path'
+import { fileURLToPath } from 'url'
+import { rollup } from 'rollup'
+import fg from 'fast-glob'
+import Alias from '@rollup/plugin-alias'
+import NodeResolve from '@rollup/plugin-node-resolve'
+
+const pathRoot = resolve(fileURLToPath(import.meta.url), '../..')
+const pathSrc = resolve(pathRoot, 'src')
+;(async () => {
+  const entries = await fg(['index.js', 'locale/*.js', 'plugin/*/*.js'], {
+    cwd: pathSrc,
+    absolute: true,
+  })
+  const bundle = await rollup({
+    input: entries,
+    plugins: [
+      Alias({
+        entries: {
+          dayjs: resolve(pathSrc, 'index.js'),
+        },
+      }),
+      NodeResolve(),
+    ],
+  })
+  await bundle.write({
+    dir: resolve(pathRoot, 'dist'),
+    entryFileNames(chunk) {
+      if (chunk.facadeModuleId) {
+        const pluginMatches = chunk.facadeModuleId.match(
+          /src\/plugin\/(.+?)\/index\.js/
+        )
+        if (pluginMatches && pluginMatches[1]) {
+          return `plugin/${pluginMatches[1]}.mjs`
+        }
+
+        if (/src\/locale\/(.+?)\.js/.test(chunk.facadeModuleId)) {
+          return 'locale/[name].mjs'
+        }
+      }
+
+      return '[name].mjs'
+    },
+    chunkFileNames: '[name].mjs',
+  })
+})()