feat(std/node): Add Readable Stream / Writable Stream / errors support (#7569)

1 files changed, 12 insertions, 0 deletions

diff --git a/std/node/_utils.ts b/std/node/_utils.ts
index b2745bf5a..cb91fac27 100644
--- a/std/node/_utils.ts
+++ b/std/node/_utils.ts
@@ -131,3 +131,15 @@ export function validateIntegerRange(
     );
   }
 }
+
+type OptionalSpread<T> = T extends undefined ? []
+  : [T];
+
+export function once(callback: (...args: OptionalSpread<undefined>) => void) {
+  let called = false;
+  return function (this: unknown, ...args: OptionalSpread<undefined>) {
+    if (called) return;
+    called = true;
+    callback.apply(this, args);
+  };
+}