fix(npm): improved optional dependency support (#19135)

Note: If the package information has already been cached, then this
requires running with `--reload` or for the registry information to be
fetched some other way (ex. the cache busting).

Closes #15544

---------

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

1 files changed, 13 insertions, 0 deletions

diff --git a/cli/tests/testdata/npm/registry/@denotest/binary-package/1.0.0/index.js b/cli/tests/testdata/npm/registry/@denotest/binary-package/1.0.0/index.js
new file mode 100644
index 000000000..5870118e7
--- /dev/null
+++ b/cli/tests/testdata/npm/registry/@denotest/binary-package/1.0.0/index.js
@@ -0,0 +1,13 @@
+const packageByOs = {
+  "darwin": "@denotest/binary-package-mac",
+  "linux": "@denotest/binary-package-linux",
+  "win32": "@denotest/binary-package-windows",
+}
+
+const selectedPackage = packageByOs[process.platform];
+
+if (!selectedPackage) {
+  throw new Error("trying to run on unsupported platform");
+}
+
+require(selectedPackage);
\ No newline at end of file