feat: generate .mjs instead of lib

.eslintignore

@@ -3,7 +3,6 @@ dist/**/*.js
 examples/**/node_modules/**/*.js
 examples/**/build/**/*.js
 examples/hello-world/bundle.js
-lib/**/*.js
 locale-data/**/*.js
 src/en.js
 src/locale-data/*.js

.gitignore

@@ -14,3 +14,4 @@ src/en.js
 core.js
 core.d.ts
 .cache
+.rpt2_cache

package.json

@@ -30,22 +30,22 @@
     "type": "git",
     "url": "git@github.com:yahoo/react-intl.git"
   },
-  "main": "./dist/index.js",
-  "module": "./lib/index.js",
+  "main": "./dist/index",
   "types": "./dist/index.d.ts",
+  "type": "module",
   "browserify-shim": {
     "react": "global:React"
   },
   "dependencies": {
-    "@formatjs/intl-relativetimeformat": "^2.5.1",
+    "@formatjs/intl-relativetimeformat": "^2.5.2",
     "@types/hoist-non-react-statics": "^3.3.1",
     "@types/invariant": "^2.2.30",
     "@types/react": "^16.0.0",
     "hoist-non-react-statics": "^3.3.0",
-    "intl-format-cache": "^4.1.5",
-    "intl-locales-supported": "^1.4.2",
-    "intl-messageformat": "^6.0.2",
-    "intl-messageformat-parser": "^3.0.1",
+    "intl-format-cache": "^4.1.6",
+    "intl-locales-supported": "^1.4.3",
+    "intl-messageformat": "^6.0.3",
+    "intl-messageformat-parser": "^3.0.2",
     "invariant": "^2.1.1",
     "react": "^16.3.0",
     "shallow-equal": "^1.1.0"
@@ -68,7 +68,7 @@
     "@typescript-eslint/eslint-plugin": "^1.13.0",
     "@typescript-eslint/parser": "^1.13.0",
     "babel-jest": "^24.8.0",
-    "babel-plugin-react-intl": "^4.1.5",
+    "babel-plugin-react-intl": "^4.1.6",
     "babel-plugin-transform-member-expression-literals": "^6.9.4",
     "babel-plugin-transform-property-literals": "^6.9.4",
     "babel-plugin-transform-react-remove-prop-types": "^0.4.18",
@@ -99,10 +99,11 @@
     "react-dom": "^16.8.6",
     "rimraf": "^2.4.2",
     "rollup": "^1.19.3",
+    "rollup-plugin-babel": "^4.3.3",
     "rollup-plugin-commonjs": "^10.0.2",
     "rollup-plugin-node-resolve": "^5.2.0",
     "rollup-plugin-replace": "^2.0.0",
-    "rollup-plugin-typescript": "^1.0.1",
+    "rollup-plugin-typescript2": "^0.22.1",
     "rollup-plugin-uglify": "^6.0.0",
     "serialize-javascript": "^1.5.0",
     "standard-version": "^7.0.0",
@@ -118,14 +119,15 @@
     "build:dist:dev": "cross-env NODE_ENV=development rollup -c rollup.config.dist.js",
     "build:dist:prod": "cross-env NODE_ENV=production rollup -c rollup.config.dist.js",
     "build:dist": "npm run build:dist:dev && npm run build:dist:prod",
-    "build:lib": "tsc -p src/tsconfig.json && tsc -p src/tsconfig.cjs.json",
+    "build:lib": "tsc -p src/tsconfig.json && npm run mjs && tsc -p src/tsconfig.cjs.json",
     "build": "npm run build:lib && npm run build:dist",
     "clean": "rimraf coverage/ dist/ lib/ core.js core.d.ts",
     "example": "parcel examples/index.html",
     "format:fix": "prettier --write '**/*.{js,md,jsx,ts,tsx}'",
     "format": "prettier --check '**/*.{js,md,jsx,ts,tsx}'",
     "lint:fix": "eslint . --fix",
     "lint": "eslint .",
+    "mjs": "find ./dist -depth -name \"*.js\" -exec sh -c 'f=\"{}\"; mv -- \"$f\" \"${f%.js}.mjs\"' \\;",
     "postchangelog": "npm run toc && npm run format:fix",
     "prerelease": "npm run clean && npm run build && npm run test:all",
     "release": "standard-version",

rollup.config.dist.js

@@ -3,7 +3,7 @@ import nodeResolve from 'rollup-plugin-node-resolve';
 import commonjs from 'rollup-plugin-commonjs';
 import replace from 'rollup-plugin-replace';
 import {uglify} from 'rollup-plugin-uglify';
-import typescript from 'rollup-plugin-typescript';
+import babel from 'rollup-plugin-babel';
 
 const isProduction = process.env.NODE_ENV === 'production';
 
@@ -21,10 +21,20 @@ const plugins = [
     },
   }),
   nodeResolve(),
-  typescript({
-    target: 'es5',
-    module: 'es6',
-    include: ['*.js+(|x)', '**/*.js+(|x)'],
+  babel({
+    configFile: false,
+    presets: [
+      [
+        '@babel/preset-env',
+        {
+          targets: {
+            ie: '11',
+            esmodules: true,
+          },
+          modules: false,
+        },
+      ],
+    ],
   }),
   commonjs({
     sourcemap: true,
@@ -37,7 +47,7 @@ const plugins = [
 
 export default [
   {
-    input: p.resolve('lib/index.js'),
+    input: p.resolve('dist/index.mjs'),
     output: {
       file: p.resolve(`dist/react-intl.${isProduction ? 'min.js' : 'js'}`),
       format: 'umd',

src/tsconfig.cjs.json

@@ -1,7 +1,6 @@
 {
     "extends": "./tsconfig.json",
     "compilerOptions": {
-        "outDir": "../dist",
         "module": "commonjs",
         "target": "es5",
     }

src/tsconfig.json

@@ -1,7 +1,7 @@
 {
     "extends": "../tsconfig.json",
     "compilerOptions": {
-        "outDir": "../lib",
+        "outDir": "../dist",
         "baseUrl": ".",
         "lib": ["dom", "es2015", "esnext.intl", "es2018.intl", "es2017.intl"]
     }

test/functional/index.ts

@@ -3,8 +3,7 @@ import buildTests from './support/build';
 import formatTests from './support/format';
 
 const builds = {
-  ES: p.resolve(require('../../package.json').module),
-  CJS: p.resolve(require('../../package.json').main),
+  Main: p.resolve(require('../../package.json').main),
   'UMD-dev': p.resolve('dist/react-intl.js'),
   'UMD-prod': p.resolve('dist/react-intl.min.js'),
 };