feat: Add warnings for more deprecated APIs (#21992)

Follow up to https://github.com/denoland/deno/pull/21939 that adds
deprecation warnings to more `Deno` APIs:

- `Deno.copy()`
- `Deno.iter()`
- `Deno.iterSync()`
- `new Deno.Buffer()`
- `Deno.readAll()`
- `Deno.readAllSync()`
- `Deno.writeAll()`
- `Deno.writeAllSync()`
- `Deno.FsWatcher.return`
- `Deno.serveHttp()`
- `Deno.metrics()`

---------

Signed-off-by: Asher Gomez <ashersaupingomez@gmail.com>
Co-authored-by: Asher Gomez <ashersaupingomez@gmail.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/runtime/js/40_fs_events.js b/runtime/js/40_fs_events.js
index 13cacc36b..0bc614335 100644
--- a/runtime/js/40_fs_events.js
+++ b/runtime/js/40_fs_events.js
@@ -1,6 +1,6 @@
 // Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
 
-import { core, primordials } from "ext:core/mod.js";
+import { core, internals, primordials } from "ext:core/mod.js";
 const {
   BadResourcePrototype,
   InterruptedPrototype,
@@ -49,6 +49,10 @@ class FsWatcher {
   // TODO(kt3k): This is deprecated. Will be removed in v2.0.
   // See https://github.com/denoland/deno/issues/10577 for details
   return(value) {
+    internals.warnOnDeprecatedApi(
+      "Deno.FsWatcher.return()",
+      new Error().stack,
+    );
     core.close(this.rid);
     return PromiseResolve({ value, done: true });
   }