Vue 3 finishComponentSetup function (runtime-core > component.ts) with some elided details

vue3_finishComponentSetup_simplified.ts

function finishComponentSetup(
  instance: ComponentInternalInstance
  /* elided argument */
) {
  const Component = instance.type as ComponentOptions

  if (Component.template && !Component.render) {
    Component.render = compile!(Component.template /* elided arg */)
  }
  /* elided details */
}