Handlebars syntax

Here's a short guide to Handlebars syntax. For more information, consult the official Handlebars documentation.
Variables
You refer to variables like this:
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{{ variable_name }}
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If the variable is an object with properties of its own, you can refer to them like so:
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{{ person.firstName }}
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This is how you refer to a specific index of an array:
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{{ people.[0] }}
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Comments
You can use Handlebars comments in your files. Commented out sections won't show up in the final rendered output.
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{{! This comment will not show up in the output}}
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If the content you want to comment out contains }} or other Handlebars tokens, you need to use different comment style: 
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{{!-- This comment may contain mustaches like }} --}}
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If-conditions
Here's an example of if-condition:
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{{#if some_variable}}
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  this will be included in the output
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{{/if}}
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Iterating over collections
This is how you iterate over a collection of items:
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{{#each securityGroupIds}}
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  - {{this}}
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{{/each}}
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Contents

Variables

Comments

If-conditions

Iterating over collections