I have a set of eVars defined in DTM(dynamic tag manager). I would be setting those values in a custom event in my code. There will be multiple instances where I would be setting this values. I can trigger multiple s.tl() calls and set those values. But I want to reduce the number of s.tl() calls. Is there any way to make one s.tl() call and set multiple values to the same eVars?
Your options for sending multiple values to the same variable on the same hit are:
Since you wanted to use an eVar, the closest to what you want to do is probably a list variable. It is mostly like an eVar, but not as flexible. Also, you only get 3 of them per report suite, so you should try to see if the other options will work for you first, unless this is a super important KPI and the other options just won't work for you (from a reporting PoV).
Example:
s.list1='foo1,foo2,foo3';
Use a merchandising eVar (product syntax)
This method uses a regular eVar but you configure it as a product syntax merchandising eVar (configuration done within the Adobe Analytics Admin interface).
Example:
s.products=";;;;;eVar1=foo1,;;;;;eVar1=foo2,;;;;;eVar1=foo3";
Note: You may optionally want to specify a category and/or product depending on what you are ultimately trying to do (especially if your site has ecommerce tracking; it helps filter this out of actual products)
You can configure any (or all!) of the 75 available props in the interface to be a list prop. The main downsides to a list prop is the 100 char limit for the prop (which may be too short, given you have multiple values), and that it is a traffic variable (only hit scope). But.. depending on what you are actually trying to record and report on, a list prop may be all you need.
Example:
s.prop1='foo1,foo2,foo3';