fix: support multiline new URL(..., import.meta.url) expressions

packages/vite/src/node/plugins/assetImportMetaUrl.ts

@@ -56,7 +56,7 @@ export function assetImportMetaUrlPlugin(config: ResolvedConfig): Plugin {
         id: {
           exclude: [exactRegex(preloadHelperId), exactRegex(CLIENT_ENTRY)],
         },
-        code: /new\s+URL.+import\.meta\.url/,
+        code: /new\s+URL.+import\.meta\.url/s,
       },
       async handler(code, id) {
         let s: MagicString | undefined

playground/assets/index.html

@@ -377,6 +377,11 @@ <h2>new URL(`${dynamic}`, import.meta.url)</h2>
   <code class="dynamic-import-meta-url-all"></code>
 </p>
 
+<h2>Multiline new URL(..., import.meta.url)</h2>
+<p>Multiline URL 1: <code class="multiline-url-1"></code></p>
+<p>Multiline URL 2: <code class="multiline-url-2"></code></p>
+<p>Multiline URL 3: <code class="multiline-url-3"></code></p>
+
 <h2>simple script tag import-expression</h2>
 <code class="import-expression"></code>
 <code class="obj-import-express"></code>
@@ -709,6 +714,12 @@ <h3>assets in template</h3>
     text(`.dynamic-import-meta-url-all`, metaUrl)
   }
 
+  // Test multiline new URL(..., import.meta.url) expressions
+  // Import from separate file to test multiline expressions are correctly processed
+  import('./multiline-import-meta-url.js').then((module) => {
+    text('.multiline-url-1', module.multilineUrl)
+  })
+
   function text(el, text) {
     document.querySelector(el).textContent = text
   }

playground/assets/multiline-import-meta-url.js

@@ -0,0 +1,11 @@
+// Test for multiline new URL(..., import.meta.url) expressions
+// This is a separate file to ensure the regex filter in assetImportMetaUrlPlugin
+// correctly detects and processes multiline expressions that span multiple lines.
+// The bug was that the filter regex didn't include the 's' flag, so multiline
+// expressions were not being processed by the plugin.
+
+export const multilineUrl = new URL(
+  './nested/fragment.svg',
+
+  import.meta.url,
+)