fix: improved support for cjs and cts modules (#26558)

* cts support
* better cjs/cts type checking
* deno compile cjs/cts support
* More efficient detect cjs (going towards stabilization)
* Determination of whether .js, .ts, .jsx, or .tsx is cjs or esm is only
done after loading
* Support `import x = require(...);`

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>

1 files changed, 19 insertions, 8 deletions

diff --git a/cli/lsp/tsc.rs b/cli/lsp/tsc.rs
index 0f31d7dd3..5fcdb3575 100644
--- a/cli/lsp/tsc.rs
+++ b/cli/lsp/tsc.rs
@@ -4362,14 +4362,25 @@ fn op_load<'s>(
       None
     } else {
       let asset_or_document = state.get_asset_or_document(&specifier);
-      asset_or_document.map(|doc| LoadResponse {
-        data: doc.text(),
-        script_kind: crate::tsc::as_ts_script_kind(doc.media_type()),
-        version: state.script_version(&specifier),
-        is_cjs: matches!(
-          doc.media_type(),
-          MediaType::Cjs | MediaType::Cts | MediaType::Dcts
-        ),
+      asset_or_document.map(|doc| {
+        let maybe_cjs_tracker = state
+          .state_snapshot
+          .resolver
+          .maybe_cjs_tracker(Some(&specifier));
+        LoadResponse {
+          data: doc.text(),
+          script_kind: crate::tsc::as_ts_script_kind(doc.media_type()),
+          version: state.script_version(&specifier),
+          is_cjs: maybe_cjs_tracker
+            .map(|t| {
+              t.is_cjs(
+                &specifier,
+                doc.media_type(),
+                doc.maybe_parsed_source().and_then(|p| p.as_ref().ok()),
+              )
+            })
+            .unwrap_or(false),
+        }
       })
     };