fix: Properly detect and reload changed files when using Vite's ?suffix imports

packages/wxt-demo/src/entrypoints/ui.content/index.ts

@@ -1,11 +1,16 @@
 import 'uno.css';
 import './style.css';
+import manualStyle from './manual-style.css?inline';
 
 export default defineContentScript({
   matches: ['https://*.duckduckgo.com/*'],
   cssInjectionMode: 'ui',
 
   async main(ctx) {
+    const style = document.createElement('style');
+    style.textContent = manualStyle;
+    document.head.append(style);
+
     const ui = await createShadowRootUi(ctx, {
       name: 'demo-ui',
       position: 'inline',

packages/wxt-demo/src/entrypoints/ui.content/manual-style.css

@@ -0,0 +1,4 @@
+body {
+  padding: 2rem;
+  background-color: blanchedalmond;
+}

packages/wxt/src/core/utils/building/__tests__/detect-dev-changes.test.ts

@@ -359,5 +359,63 @@ describe('Detect Dev Changes', () => {
 
       expect(actual).toEqual(expected);
     });
+
+    it('should detect changes to import files with `?suffix`', () => {
+      const importedPath = '/root/utils/shared.css?inline';
+      const changedPath = '/root/utils/shared.css';
+      const script1 = fakeContentScriptEntrypoint({
+        inputPath: '/root/overlay1.content/index.ts',
+      });
+      const script2 = fakeContentScriptEntrypoint({
+        inputPath: '/root/overlay2.ts',
+      });
+      const script3 = fakeContentScriptEntrypoint({
+        inputPath: '/root/overlay3.content/index.ts',
+      });
+
+      const step1: BuildStepOutput = {
+        entrypoints: script1,
+        chunks: [
+          fakeOutputChunk({
+            moduleIds: [fakeFile(), importedPath],
+          }),
+        ],
+      };
+      const step2: BuildStepOutput = {
+        entrypoints: script2,
+        chunks: [
+          fakeOutputChunk({
+            moduleIds: [fakeFile(), fakeFile(), fakeFile()],
+          }),
+        ],
+      };
+      const step3: BuildStepOutput = {
+        entrypoints: script3,
+        chunks: [
+          fakeOutputChunk({
+            moduleIds: [importedPath, fakeFile(), fakeFile()],
+          }),
+        ],
+      };
+
+      const currentOutput: BuildOutput = {
+        manifest: fakeManifest(),
+        publicAssets: [],
+        steps: [step1, step2, step3],
+      };
+      const expected: DevModeChange = {
+        type: 'content-script-reload',
+        cachedOutput: {
+          ...currentOutput,
+          steps: [step2],
+        },
+        changedSteps: [step1, step3],
+        rebuildGroups: [script1, script3],
+      };
+
+      const actual = detectDevChanges([changedPath], currentOutput);
+
+      expect(actual).toEqual(expected);
+    });
   });
 });

packages/wxt/src/core/utils/building/detect-dev-changes.ts

@@ -135,14 +135,26 @@
   const changes: BuildStepOutput[] = [];
   const changedPath = normalizePath(changedFile);
 
-  const isChunkEffected = (chunk: OutputFile): boolean =>
-    // If it's an HTML file with the same path, is is effected because HTML files need to be re-rendered
-    // - fileName is normalized, relative bundle path, "<entrypoint-name>.html"
-    (chunk.type === 'asset' &&
-      changedPath.replace('/index.html', '.html').endsWith(chunk.fileName)) ||
-    // If it's a chunk that depends on the changed file, it is effected
-    // - moduleIds are absolute, normalized paths
-    (chunk.type === 'chunk' && chunk.moduleIds.includes(changedPath));
+  const isChunkEffected = (chunk: OutputFile): boolean => {
+    switch (chunk.type) {
+      // If it's an HTML file with the same path, is is effected because HTML files need to be re-rendered
+      // - fileName is normalized, relative bundle path, "<entrypoint-name>.html"
+      case 'asset': {
+        return changedPath
+          .replace('/index.html', '.html')
+          .endsWith(chunk.fileName);
+      }
+      // If it's a chunk that depends on the changed file, it is effected
+      // - moduleIds are absolute, normalized paths
+      case 'chunk': {
+        const modulePaths = chunk.moduleIds.map((path) => path.split('?')[0]);
+        return modulePaths.includes(changedPath);
+      }
+      default: {
+        return false;
+      }
+    }
+  };
 
   for (const step of currentOutput.steps) {
     const effectedChunk = step.chunks.find((chunk) => isChunkEffected(chunk));