Fix side effects glob matching

packages/utils/node-resolver-core/src/NodeResolver.js

@@ -1170,13 +1170,21 @@ export default class NodeResolver {
       case 'boolean':
         return pkg.sideEffects;
       case 'string': {
-        let sideEffects = pkg.sideEffects;
-        invariant(typeof sideEffects === 'string');
-        return micromatch.isMatch(
-          path.relative(pkg.pkgdir, filePath),
-          sideEffects,
-          {matchBase: true},
-        );
+        let glob = pkg.sideEffects;
+        invariant(typeof glob === 'string');
+
+        let relative = path.relative(pkg.pkgdir, filePath);
+        if (!glob.includes('/')) {
+          glob = `**/${glob}`;
+        }
+
+        // Trim off "./" to make micromatch behave correctly,
+        // `path.relative` never returns a leading "./"
+        if (glob.startsWith('./')) {
+          glob = glob.substr(2);
+        }
+
+        return micromatch.isMatch(relative, glob, {dot: true});
       }
       case 'object':
         return pkg.sideEffects.some(sideEffects =>

packages/utils/node-resolver-core/test/resolver.js

@@ -1015,6 +1015,99 @@ describe('resolver', function () {
       });
     });
 
+    describe('sideEffects: globs', function () {
+      it('should determine sideEffects correctly (matched)', async function () {
+        let resolved = await resolver.resolve({
+          env: BROWSER_ENV,
+          filename: 'side-effects-false-glob/a/index',
+          specifierType: 'esm',
+          parent: path.join(rootDir, 'foo.js'),
+        });
+        assert.deepEqual(
+          {filePath: resolved?.filePath, sideEffects: resolved?.sideEffects},
+          {
+            filePath: path.resolve(
+              rootDir,
+              'node_modules/side-effects-false-glob/a/index.js',
+            ),
+            sideEffects: undefined,
+          },
+        );
+      });
+      it('should determine sideEffects correctly (unmatched)', async function () {
+        let resolved = await resolver.resolve({
+          env: BROWSER_ENV,
+          filename: 'side-effects-false-glob/b/index.js',
+          specifierType: 'esm',
+          parent: path.join(rootDir, 'foo.js'),
+        });
+        assert.deepEqual(
+          {filePath: resolved?.filePath, sideEffects: resolved?.sideEffects},
+          {
+            filePath: path.resolve(
+              rootDir,
+              'node_modules/side-effects-false-glob/b/index.js',
+            ),
+            sideEffects: false,
+          },
+        );
+      });
+      it('should determine sideEffects correctly (matched dotslash)', async function () {
+        let resolved = await resolver.resolve({
+          env: BROWSER_ENV,
+          filename: 'side-effects-false-glob/sub/index.js',
+          specifierType: 'esm',
+          parent: path.join(rootDir, 'foo.js'),
+        });
+        assert.deepEqual(
+          {filePath: resolved?.filePath, sideEffects: resolved?.sideEffects},
+          {
+            filePath: path.resolve(
+              rootDir,
+              'node_modules/side-effects-false-glob/sub/index.js',
+            ),
+            sideEffects: undefined,
+          },
+        );
+      });
+      it('should determine sideEffects correctly (unmatched, prefix in subdir)', async function () {
+        let resolved = await resolver.resolve({
+          env: BROWSER_ENV,
+          filename: 'side-effects-false-glob/sub/a/index.js',
+          specifierType: 'esm',
+          parent: path.join(rootDir, 'foo.js'),
+        });
+        assert.deepEqual(
+          {filePath: resolved?.filePath, sideEffects: resolved?.sideEffects},
+          {
+            filePath: path.resolve(
+              rootDir,
+              'node_modules/side-effects-false-glob/sub/a/index.js',
+            ),
+            sideEffects: false,
+          },
+        );
+      });
+      it('should determine sideEffects correctly (only name)', async function () {
+        let resolved = await resolver.resolve({
+          env: BROWSER_ENV,
+          filename: 'side-effects-false-glob/sub/index.json',
+          specifierType: 'esm',
+          parent: path.join(rootDir, 'foo.js'),
+        });
+        assert.deepEqual(
+          {filePath: resolved?.filePath, sideEffects: resolved?.sideEffects},
+          {
+            filePath: path.resolve(
+              rootDir,
+              'node_modules/side-effects-false-glob/sub/index.json',
+            ),
+            sideEffects: undefined,
+          },
+        );
+      });
+    });
+
     it('should not resolve a node module for URL dependencies', async function () {
       let resolved = await resolver.resolve({
         env: BROWSER_ENV,