Add notes that usually create-root delay is not needed

Author: Deraen

demo/reagentdemo/intro.cljs

@@ -1,6 +1,5 @@
 (ns reagentdemo.intro
   (:require [reagent.core :as r]
-            [reagent.dom.client :as rdomc]
             [reagentdemo.common :as common :refer [demo-component]]
             [reagentdemo.syntax :as s]
             [simpleexample.core :as simple]

demo/sitetools/core.cljs

@@ -13,7 +13,8 @@
 (declare main-content)
 
 (defonce root
-  ;; Init only on use, this ns is loaded for SSR build also
+  ;; Init only on use, this ns is loaded for SSR build also,
+  ;; delay is usually not needed on regular apps.
   (delay (rdomc/create-root (js/document.getElementById "main-content"))))
 
 (defonce config (r/atom {:body [#'main-content]

examples/material-ui/src/example/core.cljs

@@ -205,7 +205,7 @@
        :xs 6}
       [form]]]]])
 
-(defonce root (delay (rdomc/create-root (.getElementById js/document "app"))))
+(defonce root (rdomc/create-root (.getElementById js/document "app")))
 
 (defn ^:export ^:dev/after-load run []
-  (rdomc/render @root [main]))
+  (rdomc/render root [main]))

examples/shadow-dom-input/src/shadow_dom_input_demo/core.cljs

@@ -78,8 +78,8 @@
     (set! (.-innerHTML shadow-app-div) "")
     (.appendChild shadow-app-div shadow-element)))
 
-(defonce root (delay (rdomc/create-root (.getElementById js/document "app"))))
+(defonce root (rdomc/create-root (.getElementById js/document "app")))
 
 (defn ^:export ^:dev/after-load run []
-  (rdomc/render @root [normal-app])
+  (rdomc/render root [normal-app])
   (setup-shadow-component))

examples/simple/src/simpleexample/core.cljs

@@ -32,6 +32,9 @@
    [clock]
    [color-input]])
 
+;; Delay create-root call until app is mounted,
+;; this is only because this ns is already part of the demosite build.
+;; Delay is not usually needed for regular apps.
 (defonce root (delay (rdomc/create-root (.getElementById js/document "app"))))
 
 (defn ^:export run []

examples/todomvc/src/todomvc/core.cljs

@@ -126,6 +126,9 @@
          [:footer#info
           [:p "Double-click to edit a todo"]]]))))
 
+;; Delay create-root call until app is mounted,
+;; this is only because this ns is already part of the demosite build.
+;; Delay is not usually needed for regular apps.
 (defonce root (delay (rdomc/create-root (.getElementById js/document "app"))))
 
 (defn ^:export run []