Function convertLegacySlots

packages/runtime-core/src/compat/renderFn.ts:263–306

(vnode: VNode)

}

function convertLegacySlots(vnode: VNode): VNode {
  const { props, children } = vnode

  let slots: Record<string, any> | undefined

  if (vnode.shapeFlag & ShapeFlags.COMPONENT && isArray(children)) {
    slots = {}
    // check "slot" property on vnodes and turn them into v3 function slots
    for (let i = 0; i < children.length; i++) {
      const child = children[i]
      const slotName =
        (isVNode(child) && child.props && child.props.slot) || 'default'
      const slot = slots[slotName] || (slots[slotName] = [] as any[])
      if (isVNode(child) && child.type === 'template') {
        slot.push(child.children)
      } else {
        slot.push(child)
      }
    }
    if (slots) {
      for (const key in slots) {
        const slotChildren = slots[key]
        slots[key] = () => slotChildren
        slots[key]._ns = true /* non-scoped slot */
      }
    }
  }

  const scopedSlots = props && props.scopedSlots
  if (scopedSlots) {
    delete props!.scopedSlots
    if (slots) {
      extend(slots, scopedSlots)
    } else {
      slots = scopedSlots
    }
  }

  if (slots) {
    normalizeChildren(vnode, slots)
  }

  return vnode
}

export function defineLegacyVNodeProperties(vnode: VNode): void {
  /* v8 ignore start */