1 files changed, 12 insertions, 0 deletions
diff --git a/cli/js/lib.deno.unstable.d.ts b/cli/js/lib.deno.unstable.d.ts
index dc50416fc..f425dec56 100644
--- a/cli/js/lib.deno.unstable.d.ts
+++ b/cli/js/lib.deno.unstable.d.ts
@@ -32,6 +32,18 @@ declare namespace Deno {
    * Requires `allow-read` and `allow-write` permissions. */
   export function linkSync(oldpath: string, newpath: string): void;
 
+  /**
+   * Returns the os name.
+   *
+   * ```ts
+   * console.log(Deno.osName());  // e.g. "Linux"
+   * ```
+   *
+   */
+
+  export function osName(): string;
+
+  /** Creates `newpath` as a hard link to `oldpath`.
   /** **UNSTABLE**: This API needs a security review.
    *
    * Creates `newpath` as a hard link to `oldpath`.