A collection of helpers for Handlebars

1. #if - with support for conditionals
2. #unless - with support for conditionals (requires #if)

#if

This is a drop-in replacement for Handlebars default #if with added support for Array checking, context switching, and the following conditionals:

• in - Check for the presence of an item in the given list.
• not in - Inverse of in
• and these standard operators ==, ===, !=, !==, <, <=, >, >=.

Basic Property Check

This is the default handlebars behavior.

{{#if property}}
  ...
{{else}}
  ...
{{/if}}

Conditionals

{{#if property '===' condition}}
  ...
{{else}}
  ...
{{/if}}

{{#if property 'in' [1,2,5]}}
  ...
{{else}}
  ...
{{/if}}

Array Checks

Use keywords all (default), any, and no for checking items in an array seperately. Optionally include a propName to evaluate collections based on their properties.

{{#if 'any' things '>' 5}}
  ...
{{else}}
  ...
{{/if}}

{{#if 'all' things 'foo' '>' 5}}
  ...
{{else}}
  ...
{{/if}}

Context Switching

You may also include a do operator to evaluate the block with a different context.

{{#if property 'do' newContext}}
  ...
{{else}}
  ...
{{/if}}

{{#if property '==' 5 'do' newContext}}
  ...
{{else}}
  ...
{{/if}}

#unless

#unless a full-featured inverse of #if. Conditions, Array checks and context swiching follow the same syntax.