Fix using syntax-unicode-sets-regex in standalone (#15675)

* Fix using `syntax-unicode-sets-regex` in standalone * Test
babel · Jun 1, 2023 · 6a84bde · 6a84bde
1 parent ecc819b
commit 6a84bde
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diff --git a/packages/babel-preset-env/src/available-plugins.ts b/packages/babel-preset-env/src/available-plugins.ts
@@ -110,6 +110,13 @@ export default {
   // syntax enabled by default, we can safely skip enabling it.
   "syntax-unicode-sets-regex": USE_ESM
     ? null
+    : // We cannot use the require call when bundling, because this is an ESM file.
+    // Babel standalone uses a modern parser, so just include a known noop plugin.
+    // Use `bind` so that it's not detected as a duplicate plugin when using it
+    // together with the TLA
+    IS_STANDALONE
+    ? // @ts-expect-error syntaxTopLevelAwait is a function when bundled
+      () => syntaxTopLevelAwait.bind()
     : // eslint-disable-next-line no-restricted-globals
       () => require("@babel/plugin-syntax-unicode-sets-regex"),
   "transform-arrow-functions": () => transformArrowFunctions,

diff --git a/packages/babel-standalone/test/babel.js b/packages/babel-standalone/test/babel.js
@@ -261,5 +261,26 @@ describe("@babel/standalone", () => {
     it("#14425 - numeric separators should be parsed correctly", () => {
       expect(() => Babel.transform("1_1", {})).not.toThrow();
     });
+    it("#15674 - supports unicode sets regex", () => {
+      expect(
+        Babel.transform("/[\\w--[b]]/v", {
+          plugins: ["transform-unicode-sets-regex"],
+        }).code,
+      ).toMatchInlineSnapshot(`"/[0-9A-Z_ac-z]/u;"`);
+
+      expect(
+        Babel.transform("/[\\w--[b]]/v", {
+          targets: { chrome: 90 },
+          presets: [["env", { modules: false }]],
+        }).code,
+      ).toMatchInlineSnapshot(`"/[0-9A-Z_ac-z]/u;"`);
+
+      expect(
+        Babel.transform("/[\\w--[b]]/v", {
+          targets: { chrome: 113 },
+          presets: [["env", { modules: false }]],
+        }).code,
+      ).toMatchInlineSnapshot(`"/[\\\\w--[b]]/v;"`);
+    });
   });
 });