fix(npm): don't resolve JS files when resolving types (#16854)

Closes #16851

3 files changed, 18 insertions, 0 deletions

diff --git a/cli/tests/testdata/npm/no_types_cjs/main.ts b/cli/tests/testdata/npm/no_types_cjs/main.ts
new file mode 100644
index 000000000..32458e839
--- /dev/null
+++ b/cli/tests/testdata/npm/no_types_cjs/main.ts
@@ -0,0 +1,7 @@
+import mod from "npm:@denotest/no-types-cjs";
+
+// it actually returns a `number` and has that in its
+// jsdocs, but the jsdocs should not have been resolved so
+// this should type check just fine
+const value: string = mod();
+console.log(value);
diff --git a/cli/tests/testdata/npm/registry/@denotest/no-types-cjs/1.0.0/main.js b/cli/tests/testdata/npm/registry/@denotest/no-types-cjs/1.0.0/main.js
new file mode 100644
index 000000000..bb6cbdb02
--- /dev/null
+++ b/cli/tests/testdata/npm/registry/@denotest/no-types-cjs/1.0.0/main.js
@@ -0,0 +1,6 @@
+/**
+ * @return {number}
+ */
+ module.exports = function () {
+  return 5;
+};
diff --git a/cli/tests/testdata/npm/registry/@denotest/no-types-cjs/1.0.0/package.json b/cli/tests/testdata/npm/registry/@denotest/no-types-cjs/1.0.0/package.json
new file mode 100644
index 000000000..60b8a0285
--- /dev/null
+++ b/cli/tests/testdata/npm/registry/@denotest/no-types-cjs/1.0.0/package.json
@@ -0,0 +1,5 @@
+{
+  "name": "@denotest/no-types-cjs",
+  "version": "1.0.0",
+  "main": "./main.js"
+}