From 77439b5db5ec6528990909833ea14ba32defe9d9 Mon Sep 17 00:00:00 2001
From: Greg Johnston <greg.johnston@gmail.com>
Date: Thu, 15 Jun 2023 20:09:22 -0400
Subject: [PATCH] fix: setting `set_pending` now that `<Transition/>` body
 doesn't re-render (#1193)

---
 leptos/src/transition.rs | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/leptos/src/transition.rs b/leptos/src/transition.rs
index a5488b3ca..d95ca259c 100644
--- a/leptos/src/transition.rs
+++ b/leptos/src/transition.rs
@@ -1,6 +1,9 @@
 use leptos_dom::{Fragment, IntoView, View};
 use leptos_macro::component;
-use leptos_reactive::{use_context, Scope, SignalSetter, SuspenseContext};
+use leptos_reactive::{
+    create_isomorphic_effect, use_context, Scope, SignalGet, SignalSetter,
+    SuspenseContext,
+};
 use std::{
     cell::{Cell, RefCell},
     rc::Rc,
@@ -97,9 +100,6 @@ where
                         is_first_run(&first_run, &suspense_context);
                     first_run.set(is_first_run);
 
-                    if let Some(set_pending) = &set_pending {
-                        set_pending.set(true);
-                    }
                     if let Some(prev_children) = &*prev_child.borrow() {
                         if is_first_run {
                             fallback().into_view(cx)
@@ -132,9 +132,12 @@ where
                 }
                 child_runs.set(child_runs.get() + 1);
 
-                if let Some(set_pending) = &set_pending {
-                    set_pending.set(false);
-                }
+                let pending = suspense_context.pending_resources;
+                create_isomorphic_effect(cx, move |_| {
+                    if let Some(set_pending) = set_pending {
+                        set_pending.set(pending.get() > 0)
+                    }
+                });
                 frag
             }))
             .build(),