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Eleventy Documentation

This is an older version of Eleventy. Full release history. Go to the newest Eleventy docs. You could try /docs/languages/handlebars/ although it may not exist.

Documentation Pages

Handlebars

Template Languages:

Eleventy Short NameFile ExtensionNPM Package
hbs.hbshandlebars.js

You can override a .hbs file’s template engine. Read more at Changing a Template’s Rendering Engine.

Handlebars Options

Optional: Set your own Library instance New in v0.3.0

As an escape mechanism for advanced usage, pass in your own instance of the Handlebars library using the Configuration API.

module.exports = function(eleventyConfig) {
let handlebars = require("handlebars");
eleventyConfig.setLibrary("hbs", handlebars);
};

Supported Features

FeatureSyntax
✅ Partials{{> user}} looks for _includes/user.hbs (does not process front matter)
✅ Helpers (Custom Tags){{ helperName myObject }} Handlebars calls them Helpers, but Eleventy calls them Shortcodes. Read more about Shortcodes or Custom Tags.
Eleventy Universal Filters{{ filterName myObject }} Read more about Filters.
Shortcodes{{{ uppercase name }}} Read more about Shortcodes. New in v0.5.0

Helpers

Helpers are used to transform or modify content. You can add Handlebars specific helpers, but you probably want to add a Universal shortcode instead.

Read more about Handlebars Helpers syntax

module.exports = function(eleventyConfig) {
// Handlebars Helper
eleventyConfig.addHandlebarsHelper("myHandlebarsHelper", function(value) {});

// Universal filters (Adds to Liquid, Nunjucks, and Handlebars)
// Read the note about Universal Filters below: Use a shortcode instead!
eleventyConfig.addFilter("myFilter", function(value) {});
};

Usage:

<h1>{{{ myHandlebarsHelper myVariable }}}</h1>
Note that if you return HTML in your Handlebars helper, you need to use the Handlebars triple-stash syntax (three opening and three closing curly brackets) to avoid double-escaped HTML.

A note about Universal Filters

Universal filters have always been funneled into Handlebars helpers. In v0.5.0, Shortcode support was added to Eleventy. Shortcodes (Paired/Single) match better with the semantic footprint of Handlebars Helpers.

module.exports = function(eleventyConfig) {  
// Universal filters (Adds to Liquid, Nunjucks, and Handlebars)
eleventyConfig.addFilter("myFilter", function(value) {});
};

Moving forward for Handlebars content, using Universal Shortcodes are preferred to Universal Filters. We will continue to support funneling Universal filters to Handlebars helpers. This will not affect your template content as the syntax for Handlebars filters/helpers/shortcodes will continue to be the same. They’re all just helpers.

Shortcodes

Shortcodes are basically reusable bits of content. You can add Handlebars specific shortcodes, but you probably want to add a Universal shortcode instead.

Single Shortcode

module.exports = function(eleventyConfig) {
// Handlebars Shortcode
eleventyConfig.addHandlebarsShortcode("user", function(name, twitterUsername) {});

// Universal Shortcodes (Adds to Liquid, Nunjucks, Handlebars)
eleventyConfig.addShortcode("user", function(name, twitterUsername) {
return `<div class="user">
<div class="user_name">${name}</div>
<div class="user_twitter">@${twitterUsername}</div>
</div>`
;

});
};

Usage

{{{ user "Zach Leatherman" "zachleat" }}}
Note that if you return HTML in your Handlebars shortcode, you need to use the Handlebars triple-stash syntax (three opening and three closing curly brackets) to avoid double-escaped HTML.
Outputs
<div class="user">
<div class="user_name">Zach Leatherman</div>
<div class="user_twitter">@zachleat</div>
</div>

Paired Shortcode

module.exports = function(eleventyConfig) {
// Handlebars Shortcode
eleventyConfig.addPairedHandlebarsShortcode("user", function(bioContent, name, twitterUsername) {});

// Universal Shortcodes (Adds to Liquid, Nunjucks, Handlebars)
eleventyConfig.addPairedShortcode("user", function(bioContent, name, twitterUsername) {
return `<div class="user">
<div class="user_name">${name}</div>
<div class="user_twitter">@${twitterUsername}</div>
<div class="user_bio">${bioContent}</div>
</div>`
;

});
};

Usage

Note that you can put any Handlebars tags or content inside the {{ user }} shortcode! Yes, even other shortcodes!

{{# user "Zach Leatherman" "zachleat" }}
Zach likes to take long walks on Nebraska beaches.
{{/ user }}
While unpaired shortcodes and helpers required that you use the Handlebars triple-stash syntax (three opening and three closing curly brackets) to avoid double-escaped HTML, paired Handlebars shortcodes do not have this requirement.
Outputs
<div class="user">
<div class="user_name">Zach Leatherman</div>
<div class="user_twitter">@zachleat</div>
<div class="user_bio">Zach likes to take long walks on Nebraska beaches.</div>
</div>

Related Docs