Convert import assertions to query parameters

packages/astro/src/vite-plugin-astro/assertions.ts

@@ -0,0 +1,11 @@
+export const convertAssertionsToQueryParams = (code: string) => code.replace(
+    /import\s+(?:[\W\w]*?\sfrom\s+(?:"(?:[^"]|\\")*"|'(?:[^']|\\')*')(\s+assert\s+([^}]+\})))/gm,
+    (statement, assertions, assertionType) => {
+      return assertions
+        ? statement.slice(0, -assertions.length - 1) +
+            '?' +
+            new URLSearchParams(JSON.parse(assertionType.replace(/(['"])?([a-z0-9A-Z_]+)(['"])?\s*:/g, '"$2": '))).toString() +
+            statement[statement.length - assertions.length - 1]
+        : statement;
+    }
+  )