Use mtime as timestamp when loading config file

Co-authored-by: Conduitry <git@chor.date>
sveltejs · May 31, 2022 · 3c39fae · 3c39fae
1 parent 12c5a9b
commit 3c39fae
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Showing 2 changed files with 11 additions and 2 deletions.
diff --git a/.changeset/tidy-months-explode.md b/.changeset/tidy-months-explode.md
@@ -0,0 +1,5 @@
+---
+'@sveltejs/vite-plugin-svelte': patch
+---
+
+Use last modified time as cache busting parameter
diff --git a/packages/vite-plugin-svelte/src/utils/load-svelte-config.ts b/packages/vite-plugin-svelte/src/utils/load-svelte-config.ts
@@ -22,7 +22,8 @@ export const knownSvelteConfigNames = [
 // also use timestamp query to avoid caching on reload
 const dynamicImportDefault = new Function(
 	'path',
-	'return import(path + "?t=" + Date.now()).then(m => m.default)'
+	'timestamp',
+	'return import(path + "?t=" + timestamp).then(m => m.default)'
 );
 
 export async function loadSvelteConfig(
@@ -38,7 +39,10 @@ export async function loadSvelteConfig(
 		// try to use dynamic import for svelte.config.js first
 		if (configFile.endsWith('.js') || configFile.endsWith('.mjs')) {
 			try {
-				const result = await dynamicImportDefault(pathToFileURL(configFile).href);
+				const result = await dynamicImportDefault(
+					pathToFileURL(configFile).href,
+					fs.statSync(configFile).mtimeMs
+				);
 				if (result != null) {
 					return {
 						...result,