Update to Babel 8

.github/workflows/main.yml

@@ -15,7 +15,7 @@ jobs:
       - name: Use Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20.x
+          node-version: 22.x
           cache: yarn
       - name: Install
         run: yarn --prefer-offline --frozen-lockfile --non-interactive --silent

babel.config.json

@@ -0,0 +1,5 @@
+{
+  "presets": [
+    ["@babel/preset-env", { "targets": { "node": 22 } }]
+  ]
+}

package.json

@@ -3,6 +3,7 @@
   "version": "0.1.6",
   "description": "A Babel preset that targets modern browsers by fixing engine bugs.",
   "main": "lib/index.js",
+  "type": "module",
   "license": "MIT",
   "scripts": {
     "start": "concurrently -r 'npm:watch:* -s'",
@@ -43,6 +44,7 @@
     }
   },
   "jest": {
+    "runner": "jest-light-runner",
     "testEnvironment": "node",
     "roots": [
       "src",
@@ -64,19 +66,19 @@
     "Jason Miller <jason@developit.ca>"
   ],
   "peerDependencies": {
-    "@babel/core": "^7.0.0-0 || ^8.0.0-0 <8.0.0"
+    "@babel/core": "^8.0.0"
   },
   "devDependencies": {
-    "@babel/cli": "^7.7.0",
-    "@babel/core": "^7.7.2",
-    "@babel/helper-fixtures": "^7.6.3",
-    "@babel/helper-plugin-test-runner": "^7.14.5",
-    "@babel/plugin-transform-modules-commonjs": "^7.5.0",
-    "@babel/plugin-transform-react-jsx": "^7.7.0",
-    "@babel/preset-env": "^7.9.6",
+    "@babel/cli": "^8.0.1",
+    "@babel/core": "^8.0.1",
+    "@babel/helper-fixtures": "^8.0.1",
+    "@babel/helper-plugin-test-runner": "^8.0.0",
+    "@babel/plugin-transform-modules-commonjs": "^8.0.1",
+    "@babel/plugin-transform-react-jsx": "^8.0.1",
+    "@babel/preset-env": "^8.0.1",
     "acorn-jsx": "^5.0.1",
     "babel-eslint": "^10.0.3",
-    "babel-plugin-add-module-exports": "^1.0.2",
+    "babel-plugin-external-helpers": "npm:@babel/plugin-external-helpers@^8.0.1",
     "chalk": "^2.4.2",
     "concurrently": "^4.1.0",
     "eslint": "^6.6.0",
@@ -86,21 +88,25 @@
     "eslint-plugin-prettier": "^3.1.1",
     "gzip-size": "^5.1.1",
     "if-env": "^1.0.4",
-    "jest": "^24.8.0",
+    "jest": "^30.4.2",
+    "jest-light-runner": "^0.7.12",
     "karmatic": "^1.4.0",
     "prettier": "^1.19.1",
     "pretty-bytes": "^5.2.0",
+    "@rollup/plugin-babel": "^5.3.1",
     "rollup": "^1.16.3",
-    "rollup-plugin-babel": "^4.3.3",
     "rollup-plugin-node-resolve": "^5.2.0",
     "terser": "^4.0.2",
     "webpack": "^4.35.0"
   },
   "dependencies": {
-    "@babel/helper-plugin-utils": "^7.0.0",
-    "@babel/plugin-proposal-unicode-property-regex": "^7.4.4",
-    "@babel/plugin-transform-dotall-regex": "^7.4.4",
-    "@babel/types": "^7.4.4",
+    "@babel/helper-plugin-utils": "^8.0.1",
+    "@babel/plugin-transform-unicode-property-regex": "^8.0.1",
+    "@babel/plugin-transform-dotall-regex": "^8.0.1",
+    "@babel/types": "^8.0.0",
     "esutils": "^2.0.2"
+  },
+  "resolutions": {
+    "chokidar": "npm:@nicolo-ribaudo/chokidar-2@2.1.8-no-fsevents.3"
   }
 }

src/index.js

@@ -1,30 +1,31 @@
-import path from "path";
 import { declare } from "@babel/helper-plugin-utils";
+import { fileURLToPath } from "url";
+
+// import.meta.resolve returns a file:// URL, but Babel resolves plugins with
+// require.resolve when transforming synchronously, which only accepts paths.
+const resolve = specifier => fileURLToPath(import.meta.resolve(specifier));
 
 /**
  * @babel/preset-modules produces clean, minimal output for ES Modules-supporting browsers.
  * @param {Object} [options]
  * @param {boolean} [options.loose=false] Loose mode skips seldom-needed transforms that increase output size.
  */
 export default declare((api, opts) => {
-  api.assertVersion(7);
+  api.assertVersion("^8.0.0");
 
   const loose = opts.loose === true;
 
   return {
     plugins: [
-      path.resolve(__dirname, "./plugins/transform-edge-default-parameters"),
-      path.resolve(__dirname, "./plugins/transform-tagged-template-caching"),
-      path.resolve(__dirname, "./plugins/transform-jsx-spread"),
-      path.resolve(__dirname, "./plugins/transform-safari-for-shadowing"),
-      path.resolve(__dirname, "./plugins/transform-safari-block-shadowing"),
-      path.resolve(__dirname, "./plugins/transform-async-arrows-in-class"),
-      !loose &&
-        path.resolve(__dirname, "./plugins/transform-edge-function-name"),
-
-      // Proposals
-      require.resolve("@babel/plugin-proposal-unicode-property-regex"),
-      require.resolve("@babel/plugin-transform-dotall-regex"),
+      resolve("./plugins/transform-edge-default-parameters/index.js"),
+      resolve("./plugins/transform-tagged-template-caching/index.js"),
+      resolve("./plugins/transform-jsx-spread/index.js"),
+      resolve("./plugins/transform-safari-for-shadowing/index.js"),
+      resolve("./plugins/transform-safari-block-shadowing/index.js"),
+      resolve("./plugins/transform-async-arrows-in-class/index.js"),
+      !loose && resolve("./plugins/transform-edge-function-name/index.js"),
+      resolve("@babel/plugin-transform-unicode-property-regex"),
+      resolve("@babel/plugin-transform-dotall-regex"),
     ].filter(Boolean),
   };
 });

test/__snapshots__/index.test.js.snap

@@ -1,4 +1,4 @@
-// Jest Snapshot v1, https://goo.gl/fbAQLP
+// Jest Snapshot v1, https://jestjs.io/docs/snapshot-testing
 
 exports[`@babel/preset-modules should pass a smoke test 1`] = `
 "const foo = async (tag, { a: _a = 1 }, { data: { props: _props = 1 } }, ...children) => {

test/_util.js

@@ -1,7 +1,7 @@
 import { promisify } from "util";
 import fs, { mkdir } from "fs";
 import path from "path";
-import { transform } from "@babel/core";
+import { transformSync } from "@babel/core";
 import gzipSize from "gzip-size";
 import terser from "terser";
 import chalk from "chalk";
@@ -23,7 +23,7 @@ export function dent(...args) {
 }
 
 export function babel(code, config) {
-  return transform(code, {
+  return transformSync(code, {
     ...options,
     ...config,
   })

test/external/safari-await-negation.test.js

@@ -1,5 +1,5 @@
-import { transform } from "@babel/core";
-import preset from "../..";
+import { transformSync } from "@babel/core";
+import preset from "../../lib/index.js";
 
 const CONFIG = {
   babelrc: false,
@@ -10,7 +10,7 @@ const CONFIG = {
 };
 
 function babel(code) {
-  return transform(code, CONFIG).code;
+  return transformSync(code, CONFIG).code;
 }
 
 // https://bugs.webkit.org/show_bug.cgi?id=176685

test/fixtures.test.js

@@ -1,3 +1,3 @@
 import runner from "@babel/helper-plugin-test-runner";
 
-runner(__dirname);
+runner(import.meta.url);

test/fixtures/transform-async-arrows-in-class/arguments/output.js

@@ -1,10 +1,8 @@
 class Foo {
   constructor() {
     var _arguments = arguments;
-
     this.x = async function () {
       return await _arguments[0];
     };
   }
-
 }

test/fixtures/transform-async-arrows-in-class/async-arrow/output.js

@@ -4,9 +4,7 @@ class Foo {
       return await 1;
     };
   }
-
   bar() {
     (async function () {})();
   }
-
 }

test/fixtures/transform-async-arrows-in-class/callback/output.js

@@ -4,5 +4,4 @@ class Foo {
       return await 1;
     });
   }
-
 }

test/fixtures/transform-async-arrows-in-class/nested/output.js

@@ -1,10 +1,8 @@
 class Foo {
   constructor() {
     var _this = this;
-
     this.x = () => async function () {
       return await _this;
     };
   }
-
 }

test/fixtures/transform-async-arrows-in-class/non-async-arrow/output.js

@@ -2,5 +2,4 @@ class Foo {
   constructor() {
     this.x = () => {};
   }
-
 }

test/fixtures/transform-async-arrows-in-class/this/output.js

@@ -1,10 +1,8 @@
 class Foo {
   constructor() {
     var _this = this;
-
     this.x = async function () {
       return await _this;
     };
   }
-
 }

test/fixtures/transform-edge-function-name/shadowed-reassignment/output.js

@@ -1,29 +1,23 @@
 const a = function a() {
   a;
 };
-
 const _b = function b() {
   _b = 1;
 };
-
 const _c = function c() {
   _c;
 };
-
 _c = 1;
-
 const _d = function d() {
   return function () {
     return () => {
       _d = 1;
     };
   };
 };
-
 const _e = function e() {
   _e;
 };
-
 () => {
   _e = 1;
 };

test/fixtures/transform-jsx-spread-useSpread/leading/options.json

@@ -9,6 +9,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread-useSpread/leading/output.js

@@ -1,3 +1,4 @@
-h("div", { ...props,
+h("div", {
+  ...props,
   b: "hi"
 }, "a");

test/fixtures/transform-jsx-spread-useSpread/lone/options.json

@@ -9,6 +9,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread-useSpread/middle/options.json

@@ -9,6 +9,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread-useSpread/multiple/options.json

@@ -9,6 +9,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread-useSpread/multiple/output.js

@@ -1,3 +1,4 @@
-h("div", { ...a,
+h("div", {
+  ...a,
   ...b
 });

test/fixtures/transform-jsx-spread-useSpread/nested/options.json

@@ -9,6 +9,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread-useSpread/nested/output.js

@@ -1,2 +1 @@
-h("div", { ...props
-});
+h("div", props);

test/fixtures/transform-jsx-spread-useSpread/none/options.json

@@ -9,6 +9,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread-useSpread/trailing/options.json

@@ -9,6 +9,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread/leading/options.json

@@ -4,6 +4,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread/lone/options.json

@@ -4,6 +4,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread/middle/options.json

@@ -4,6 +4,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread/multiple/options.json

@@ -4,6 +4,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]

test/fixtures/transform-jsx-spread/nested/options.json

@@ -4,6 +4,7 @@
     [
       "@babel/plugin-transform-react-jsx",
       {
+        "runtime": "classic",
         "pragma": "h"
       }
     ]