Multiple feature for one entry point
You can declare multiple defineFeature in the same steps.js, that permit you to split your feature in multiple files.
Performance
This could lead to a low performance for this type of steps.js file.
How to do it​
import { defineFeature } from "__features__/specflowEmulator";
defineFeature("./feature1.feature");
defineFeature("./feature2.feature");
defineFeature("./feature3.feature");
When launching this steps.js file in your test runner, it will automaticly run all scenario from all the feature file declared.