Function mountFallback

packages/runtime-core/src/components/Suspense.ts:662–680

()

      const anchor = next(activeBranch!)
      const mountFallback = () => {
        suspense.isFallbackMountPending = false
        if (!suspense.isInFallback) {
          return
        }
        // mount the fallback tree
        patch(
          null,
          fallbackVNode,
          container,
          anchor,
          parentComponent,
          null, // fallback tree will not have suspense context
          namespace,
          slotScopeIds,
          optimized,
        )
        setActiveBranch(suspense, fallbackVNode)
      }

      const delayEnter =
        fallbackVNode.transition && fallbackVNode.transition.mode === 'out-in'