Ember Handlebars "ternary" helper

readme.md

Ternary helper for Ember Handlebars

With two parameters: if first parameter evaluates to true it will be printed, otherwise second

{{iftrue project.price 'N/A'}} // $9.99
{{iftrue project.priceNotAvailable 'N/A'}} // N/A

With three parameters: if first parameter evaluates to true second will be printed, otherwise third

// If deadline is set formatted date will be printed, otherwise 'N/A'
{{iftrue project.deadline (moment-format project.deadline 'DD.MM.YYYY') 'N/A'}} 

iftrue.js

// app/helpers/iftrue.js
import Ember from 'ember';

export function iftrue(params) {
  if (params[0]) {
    return params.length === 2 ? params[0] : params[1];
  }
  if (params.length === 2) {
    return params[1];
  } else if (params.length === 3) {
    return params[2];
  }
  return null;
}

export default Ember.Helper.helper(iftrue);