more fixes

src/karax.nim

@@ -256,6 +256,8 @@ proc redraw*() =
   else:
     dodraw()
 
+proc redrawForce*() = dodraw()
+
 proc init(ev: Event) =
   reqFrame(dodraw)
 
@@ -263,6 +265,12 @@ proc setRenderer*(renderer: proc (): VNode) =
   dorender = renderer
   window.onload = init
 
+proc setRendererOnly*(renderer: proc (): VNode) =
+  dorender = renderer
+
+proc setOnloadOnly*() =
+  window.onload = init
+
 proc addEventHandler*(n: VNode; k: EventKind; action: EventHandler) =
   ## Implements the foundation of Karax's event management.
   ## Karax DSL transforms ``tag(onEvent = handler)`` to