Save the clicked search result of SharePoint to list

 

 

 window.CustomFunction = function(){
var cusTitle = ctx.CurrentItem.Title;  - here is the error
   alert(cusTitle);
var clientContext;
var scriptbase = _spPageContextInfo.webServerRelativeUrl + "/_layouts/15/";
$.getScript(scriptbase + "SP.js", function () {
clientContext = SP.ClientContext.get_current();
var oList = clientContext.get_web().get_lists().getByTitle("Contents");
var itemCreateInfo = new SP.ListItemCreationInformation();
var oListItem = oList.addItem(itemCreateInfo);
//var cusTitle = $getItemValue(ctx, "Title");
});
}

In that case, implement custom display template.

In an item template, implement JSOM based code to track user clicked search result. 

You can get list of all search queries from Popularity and Search reports.

Please refer:

https://www.c-sharpcorner.com/article/track-users-interest-in-sharepoint/