mustache.js

// simple variable replacement using {{}} and Mustache.to_html()
var str = Mustache.to_html('i like hats that are {{color}}',
  { 
    color : "blue" 
  }
);
console.log(str); // i like hats that are red

// replacing multiple variables
var str = Mustache.to_html('i like {{thing}} that are {{color}}',
  { 
    color : "blue",
    thing : "dogs"
  }
);
console.log(str); // i like dogs that are blue


// now we remember that second attribute accepts JSON, which means we can use ANYTHING JavaScript normally has access to.
var str = Mustache.to_html('i like {{thing}} that are {{color}} and {{stuff}} which is {{adjective}}',
  { 
    color : apiCall.getColor('dogs'),
    thing : $('#animalSelect').val(), 
    stuff : function(){
      if(1=0){
        return 'hell';
      }
      else{
      return 'poop';
    }
    adjective : 'hard' 
  }
);

It looks like you're missing a closing bracket on that else statement.