Actions::serial

packages/behavior/context/globals.js

@@ -30,6 +30,10 @@ export class Globals {
     return min + (floor ? Math.floor(mag) : mag);
   }
 
+  serial(actions, context) {
+    return actions.serial(context);
+  }
+
   testing() {
     return null;
   }

packages/behavior/item/actions.js

@@ -114,4 +114,23 @@ export class Actions extends decorate(Traversals) {
     }
   }
 
+  serial(context) {
+    // Do a "dry" tick.
+    this.tick(context, 0);
+    // If it's pending, we have to return a ticking promise.
+    if (this.pending) {
+      let resolve_;
+      const tickingPromise = new TickingPromise((resolve) => {
+        resolve_ = resolve;
+      });
+      tickingPromise.ticker = (elapsed) => {
+        this.tick(context, elapsed);
+      }
+      this.once('actionsFinished', () => {
+        resolve_();
+      });
+      return tickingPromise;
+    }
+  }
+
 }