Merge pull request #363 from contentstack/VE-5279-onchange-when-live-preview-parameter-is-present

fix: call onChangeCallback when live_preview parameter is present in URL

Author: faraazb

src/preview/contentstack-live-preview-HOC.ts

@@ -152,7 +152,18 @@ class ContentstackLivePreview {
                 onChangeCallback;
         }
 
-        if (!skipInitialRender) {
+        const searchParams =
+            typeof window !== "undefined"
+                ? new URLSearchParams(window.location.search)
+                : null;
+        const hasLivePreviewHash =
+            searchParams && searchParams.has("live_preview");
+        const isBuilder = searchParams && searchParams.has("builder");
+        const shouldCallCallback = hasLivePreviewHash && isBuilder;
+        // calling onChangeCallback when live_preview search parameter
+        // is present because we don't send the initial client-data-send
+        //  message in visual builder
+        if (!skipInitialRender || shouldCallCallback) {
             onChangeCallback();
         }