Function mountSuspense

packages/runtime-core/src/components/Suspense.ts:162–225

(
  vnode: VNode,
  container: RendererElement,
  anchor: RendererNode | null,
  parentComponent: ComponentInternalInstance | null,
  parentSuspense: SuspenseBoundary | null,
  namespace: ElementNamespace,
  slotScopeIds: string[] | null,
  optimized: boolean,
  rendererInternals: RendererInternals,
)

}

function mountSuspense(
  vnode: VNode,
  container: RendererElement,
  anchor: RendererNode | null,
  parentComponent: ComponentInternalInstance | null,
  parentSuspense: SuspenseBoundary | null,
  namespace: ElementNamespace,
  slotScopeIds: string[] | null,
  optimized: boolean,
  rendererInternals: RendererInternals,
) {
  const {
    p: patch,
    o: { createElement },
  } = rendererInternals
  const hiddenContainer = createElement('div')
  const suspense = (vnode.suspense = createSuspenseBoundary(
    vnode,
    parentSuspense,
    parentComponent,
    container,
    hiddenContainer,
    anchor,
    namespace,
    slotScopeIds,
    optimized,
    rendererInternals,
  ))

  // start mounting the content subtree in an off-dom container
  patch(
    null,
    (suspense.pendingBranch = vnode.ssContent!),
    hiddenContainer,
    null,
    parentComponent,
    suspense,
    namespace,
    slotScopeIds,
  )
  // now check if we have encountered any async deps
  if (suspense.deps > 0) {
    // has async
    // invoke @fallback event
    triggerEvent(vnode, 'onPending')
    triggerEvent(vnode, 'onFallback')

    // mount the fallback tree
    patch(
      null,
      vnode.ssFallback!,
      container,
      anchor,
      parentComponent,
      null, // fallback tree will not have suspense context
      namespace,
      slotScopeIds,
    )