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if

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{{#if(EXPRESSION)}}FN{{else}}INVERSE{{/if}}

Renders FN if EXPRESSION is truthy or INVERSE if EXPRESSION is falsey. Both FN and INVERSE will be rendered with the current scope.

{{#if(person.isAwake())}} Hello {{/if}}

Parameters

  1. EXPRESSION {KeyLookup Expression|Call Expression}:

    A lookup expression that will provide a truthy or falsey value.

  2. FN {sectionRenderer(context, helpers)}:

    A subsection that can be optionally rendered.

  3. INVERSE {sectionRenderer(context, helpers)}:

    An optional subsection that will be rendered if EXPRESSION is falsey and {{else}} is used.

Use

{{#if(key)}} provides explicit conditional truthy tests.

For example, this template:

{{#if(user.isFemale)}}
  {{#if(user.isMarried)}}
    Mrs
  {{/if}}
  {{#if(user.isSingle)}}
    Miss
  {{/if}}
{{/if}}

Rendered with:

{ user: { isFemale: true, isMarried: true } }

Results in:

Mrs

If can be used with {{else}} too. For example,

{{#if(user.isFemale)}}
  {{#if(user.isMarried)}}
    Mrs
  {{else}}
    Miss
  {{/if}}
{{/if}}

Rendered with:

{ user: { isFemale: true, isMarried: false } }

Results in:

Miss

CanJS is part of DoneJS. Created and maintained by the core DoneJS team and Bitovi. Currently 6.0.1.

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