Are there standard events to capture the search term entered and search button clicked in the standard Napili template so that I can get search term entered and build my own lightning component with search term entered ?
Please see attached screenshot .Basically the aim is to capture the standard lightning event thats been published when user clicked search term on the header and call an API with search term entered ?
The solution I found was removing the search result component on the search page and adding the global search component. You could then select within the global search component which objects it would return results from
The Options that we see in the Select Post Destination is based on the Navigational Topics .
You will need to add some Navigational Topics to see the Options there .
Take a look at screenshot from one my sample orgs
Here is good old blog from me on how to set these
Best Answer
I had to get on a call with Salesforce Engineer to really understand this .This is what we concluded
We can create a design file for the lightning components and use the same merge values as other components use on the page .In this case i can simple go to the Search detail page and check the standard context variable
In the above screenshot I have variables like "{!searchString}" and "{!topicName}" .I will need a design file for these attributes and community admin needs to use the same strings so that my lightning component can access it .
Here is a blogpost i wrote on this topic with some detail insight
http://cloudyworlds.blogspot.com/2016/01/customizing-napili-template-of-sfdc-for.html