Question

[Note: This question is very similar, but not quite the same.]

I’m trying to do if statements with underscore templates. I have tried:

<% if (_id) { %><%=_id %><% } %>

and

<% if (_id) { _id } %>

and

<% if (_id) { <%= _id %> } %>

and a bunch of other combinations, but I always get the error

ReferenceError: _id is not defined

Any suggestions?

Answer 1

I have no idea what is your code, but _id is obviously an identifier. The problem, though, that you do not have _id defined.

As for suggestion, I’d probably suggest that you define it or use the one that is defined. It’s hard to give you a better suggestion with zero context.

EDIT: you probably want if(typeof _id != 'undefined') instead.