Meteor templates, check if with or

Question

I want to check a condition with or. how is it possible?

  {{#if  $.Session.equals 'showField' 'edit'}}

or

 {{#if  $.Session.equals 'showField' 'add'}}

Answer 1

As Blueren and Iiro said:

 {{#if or  ($.Session.equals 'showField' 'edit') ($.Session.equals 'showField' 'add') }}

Then in clien/helpers folder make a js file and put this:

Template.registerHelper('or',(a,b)=>{
  return a || b;
});