Function createSpring

packages/core/src/Controller.ts:551–558

(key: string, observer?: FluidObserver<FrameValue.Event>)

}

function createSpring(key: string, observer?: FluidObserver<FrameValue.Event>) {
  const spring = new SpringValue()
  spring.key = key
  if (observer) {
    addFluidObserver(spring, observer)
  }
  return spring
}

/**
 * Ensure spring objects exist for each defined key.