fix: add more warnings when using sloppy imports (#21503)

One warning for when using it with `deno compile` and another when using
it with `deno run`.

1 files changed, 7 insertions, 0 deletions

diff --git a/cli/tools/run/mod.rs b/cli/tools/run/mod.rs
index 321f94fc6..f4604e248 100644
--- a/cli/tools/run/mod.rs
+++ b/cli/tools/run/mod.rs
@@ -45,6 +45,13 @@ To grant permissions, set them before the script argument. For example:
   let http_client = factory.http_client();
   let cli_options = factory.cli_options();
 
+  if cli_options.unstable_sloppy_imports() {
+    log::warn!(
+      "{} Sloppy imports are not recommended and have a negative impact on performance.",
+      crate::colors::yellow("Warning"),
+    );
+  }
+
   // Run a background task that checks for available upgrades or output
   // if an earlier run of this background task found a new version of Deno.
   #[cfg(feature = "upgrade")]