1 files changed, 22 insertions, 0 deletions
diff --git a/ext/node/polyfills/_util/os.ts b/ext/node/polyfills/_util/os.ts
new file mode 100644
index 000000000..66d18534c
--- /dev/null
+++ b/ext/node/polyfills/_util/os.ts
@@ -0,0 +1,22 @@
+// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
+
+export type OSType = "windows" | "linux" | "darwin" | "freebsd";
+
+export const osType: OSType = (() => {
+  // deno-lint-ignore no-explicit-any
+  const { Deno } = globalThis as any;
+  if (typeof Deno?.build?.os === "string") {
+    return Deno.build.os;
+  }
+
+  // deno-lint-ignore no-explicit-any
+  const { navigator } = globalThis as any;
+  if (navigator?.appVersion?.includes?.("Win")) {
+    return "windows";
+  }
+
+  return "linux";
+})();
+
+export const isWindows = osType === "windows";
+export const isLinux = osType === "linux";