SharePoint Cross Site Publishing

Create 2 Site Collections
-Publishing
-Authoring

Open Authoring site
-Add new list
Ex: News
Add items to News list.

Now i have a list in Authoring site.

Open Publishing Site
Open any page, Edit the page.
Add webpart.
Media and Content –>Script Editor
Add web part
Edit Snippet

Here we can add Javascript code and HTML5 and REST API to get the list data.
Try to write your own code…

This is not crawled data, just we are pulling from another site collection.

If you want to show Indexed data, we have to do another way…