feat: Add debug operator

This operator can be inserted in a callbag chain (e.g. in a call to `pipe`) to log all the events that flow through
cyclejs · May 2, 2021 · 89ba65d · 89ba65d
1 parent 2c16f7a
commit 89ba65d
Showing 1 changed file with 8 additions and 0 deletions.
diff --git a/src/map.ts b/src/map.ts
@@ -31,3 +31,11 @@ export function scan<A, B>(
     });
   };
 }
+
+export function debug<A>(msg: string | ((a: A) => void)): Operator<A, A> {
+  const f = typeof msg === 'function' ? msg : (x: A) => console.log(msg, x);
+  return map(x => {
+    f(x);
+    return x;
+  });
+}