Merge pull request #593 from preactjs/debug-warning

Author: JoviDeCroock

.changeset/eleven-beers-lay.md

@@ -0,0 +1,6 @@
+---
+'@prefresh/vite': patch
+'@prefresh/webpack': patch
+---
+
+Convey information when an update fails

packages/vite/src/index.js

@@ -10,7 +10,10 @@ module.exports = function prefreshPlugin(options = {}) {
   return {
     name: 'prefresh',
     configResolved(config) {
-      shouldSkip = config.isProduction || config.command === 'build' || config.server.hmr === false;
+      shouldSkip =
+        config.isProduction ||
+        config.command === 'build' ||
+        config.server.hmr === false;
     },
     async transform(code, id, options) {
       const ssr =
@@ -91,6 +94,7 @@ module.exports = function prefreshPlugin(options = {}) {
             try {
               flushUpdates();
             } catch (e) {
+              console.log('[PREFRESH] Failed to flush updates:', e);
               self.location.reload();
             }
           });

packages/webpack/src/loader/runtime.js

@@ -41,6 +41,7 @@ module.exports = function () {
           if (moduleHot.invalidate) {
             moduleHot.invalidate();
           } else {
+            console.log('[PREFRESH] Failed to flush updates:', e);
             self.location.reload();
           }
         }