Conditional Execution

The {{#if}} / {{#else}} / {{/if}} directives are used to conditionally include sections:

{{#if model.quantity == 0}}
<p>OUT OF STOCK</p>
{{/if}}

Else blocks can be marked as {{#else}} or {{else}} (for Mustache/Handlebars compatibility)

{{#if model.quantity == 0}}
<p>OUT OF STOCK</p>
{{#else}}
<P>IN STOCK</P>
{{/if}}

There's also an {{#elseif}} directive:

{{#if model.quantity == 0}}
<p>OUT OF STOCK</p>
{{#elseif model.quantity < 3}}
<p>ALMOST OUT OF STOCK</p>
{{#else}}
<P>IN STOCK</P>
{{/if}}

As an alternative for {{#else}} and {{#elseif}} you can use {{^}} and {{^if}}:

{{#if model.quantity == 0}}
<p>OUT OF STOCK</p>
{{^if model.quantity < 3}}
<p>ALMOST OUT OF STOCK</p>
{{^}}
<P>IN STOCK</P>
{{/if}}

Moe-js doesn't really need an {{#unless}} block (because it's easy to just use {{#if !(expr)}}) but includes one anyway:

{{#unless model.newUser}}
<p>User ID: {{model.user.id}}</p>
{{/unless}}

An {{#unless}} block can't have an {{#else}} block.