feat: re-transpile excluded modules when target is es5

src/index.ts

@@ -108,6 +108,17 @@ function swc(options: PluginOptions = {}): Plugin {
     },
 
     renderChunk(code: string) {
+      if (options.jsc?.target === 'es5') {
+        // always do another swc transform to transpile
+        // unprocessed es2015/es6 node module files
+        return swcTransform(code, {
+          minify: Boolean(options.minify),
+          jsc: {
+            minify: options.jsc?.minify,
+            target: options.jsc?.target,
+          }
+        });
+      }
       if (options.minify) {
         return swcMinify(code, options.jsc?.minify);
       }

test/index.ts

@@ -191,6 +191,34 @@ export { foo };
     output[0].code.should.equal(`var foo = /*#__PURE__*/ custom("div", null, "foo");
 
 export { foo };
+`);
+  });
+
+  it('transpiles excluded modules when target is "es5"', async () => {
+    const dir = realFs(getTestName(), {
+      './fixture/foo.js': `
+        const foo = 'foo';
+        export default foo;
+      `,
+      './fixture/other.js': `
+        import foo from './foo'
+        console.log(foo)
+        export const bar = 'bar';
+        console.log(bar);
+      `,
+    });
+    const output = await build({
+      exclude: ['**/other.js'],
+      jsc: { target: 'es5' }
+    }, {
+      input: ['./fixture/other.js'],
+      dir
+    });
+    output[0].code.should.equal(`var foo = 'foo';
+console.log(foo);
+var bar = 'bar';
+console.log(bar);
+export { bar };
 `);
   });
 });