SharePoint JavaScript CSOM: Best Way To Deal With Lookup Fields?

I'm new to CSOM (I've used SPServices up to this point), and I'm trying to learn the basics to getting list items. I have a list with lots of columns, several of which are lookups

Solution 1:

The Lookup field stores object (e.g. 5;#someValue) that has two properties

1. lookup Id (5)
2. Lookup Value (someValue)

Please try to get lookup value by below mentioned way.

var lookupObject = oListItem.get_item('lookupFieldName');
var lookupValue = lookupObject.get_lookupValue();
var lookupId = lookupObject.get_lookupId();