fix: produce the most unholy code

packages/browser/src/node/plugin.ts

@@ -158,6 +158,24 @@ export default (browserServer: BrowserServer, base = '/'): Plugin[] => {
             res.end(buffer)
           })
         }
+        server.middlewares.use((req, res, next) => {
+          // 9000 mega head move
+          // Vite always caches optimized dependencies, but users might mock
+          // them in _some_ tests, while keeping original modules in others
+          // there is no way to configure that in Vite, so we patch it here
+          // to always ignore the cache-control set by Vite in the next middleware
+          if (req.url && req.url.includes('/deps/') && !req.url.includes('chunk-')) {
+            res.setHeader('Cache-Control', 'no-cache')
+            const setHeader = res.setHeader.bind(res)
+            res.setHeader = function (name, value) {
+              if (name === 'Cache-Control') {
+                return res
+              }
+              return setHeader(name, value)
+            }
+          }
+          next()
+        })
       },
     },
     {

packages/mocker/src/browser/interceptor-msw.ts

@@ -101,13 +101,6 @@ export class ModuleMockerMSWInterceptor implements ModuleMockerInterceptor {
         http.get(/.+/, async ({ request }) => {
           const path = cleanQuery(request.url.slice(location.origin.length))
           if (!this.mocks.has(path)) {
-            // do not cache deps like Vite does for performance
-            // because we want to be able to update mocks without restarting the server
-            // TODO: check if it's still neded - we invalidate modules after each test
-            if (path.includes('/deps/')) {
-              return fetch(bypass(request))
-            }
-
             return passthrough()
           }
 
@@ -151,20 +144,6 @@ function passthrough() {
   })
 }
 
-function bypass(request: Request) {
-  const clonedRequest = request.clone()
-  clonedRequest.headers.set('x-msw-intention', 'bypass')
-  const cacheControl = clonedRequest.headers.get('cache-control')
-  if (cacheControl) {
-    clonedRequest.headers.set(
-      'cache-control',
-      // allow reinvalidation of the cache so mocks can be updated
-      cacheControl.replace(', immutable', ''),
-    )
-  }
-  return clonedRequest
-}
-
 const replacePercentageRE = /%/g
 function injectQuery(url: string, queryToInject: string): string {
   // encode percents for consistent behavior with pathToFileURL