comment

packages/kit/src/runtime/client/client.js

@@ -1368,6 +1368,13 @@ async function load_data(url, invalid) {
  data_url.searchParams.set('__invalid', invalid.map((x) => (x ? 'y' : 'n')).join(''));
  data_url.searchParams.set('__id', String(data_id++));
 
+ // The __data.js file is generated by the server and looks like
+ // `window.__sveltekit_data = ${devalue(data)}`. We do this instead
+ // of `export const data` because modules are cached indefinitely,
+ // and that would cause memory leaks.
+ //
+ // The data is read and deleted in the same tick as the promise
+ // resolves, so it's not vulnerable to race conditions
  await import(/* @vite-ignore */ data_url.href);
 
  // @ts-expect-error