Conditional class in slim with 3 conditions

问题

I would like to write conditional class in slim but I only know how to do it with 2 conditions, like :

div class=(index == 0 ? 'class1' : 'class1 class3')

How to do it with three conditions?

- if index == 0
  .class1
- elsif index == -1
  .class2.class3
- else
  .class1.class3

回答1:

div class=(if index == 0 then 'class1' elsif index == -1
then 'class2 class3' else '.class1 class3' end)

来源：https://stackoverflow.com/questions/40591084/conditional-class-in-slim-with-3-conditions