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Static site generator for Node.js, Grunt.js, and Yeoman and Gulp. Render templates with Handlebars, Lo-Dash or any template engine. Used by Less.js /, Topcoat, Web Experience Toolkit, and hundreds of other projects to build sites, themes, components, documentation, blogs and gh-pages.
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assemble NPM version Build Status

Static site generator for Grunt.js and Yeoman. Assemble makes it dead simple to build modular sites, blogs, gh-pages, components and documentation from reusable templates and data.

See the live docs →

Getting Started

Assemble requires Grunt ~0.4.1

If you haven't used grunt before, be sure to check out the Getting Started guide.

From the same directory as your project's Gruntfile and package.json, install Assemble with the following command:

npm install assemble --save-dev

Once that's done, add this line to your project's Gruntfile:


The "assemble" task

Run the "assemble" task with the grunt assemble command.

Task targets, files and options may be specified according to the grunt Configuring tasks guide.

In your project's Gruntfile, add a section named assemble to the data object passed into grunt.initConfig().

assemble: {
  options: {
    assets: 'assets',
    partials: ['docs/includes/**/*.hbs'],
    data: ['docs/data/**/*.{json,yml}']
  pages: {
    src: ['docs/*.hbs'],
    dest: './'


See the documentation for Options for more information.


Type: String Default: undefined

Used with the {{assets}} variable to resolve the relative path from the dest file to the assets folder.


Type: String|Array Default: src/data

Specify the data to supply to your templates. Data may be formatted in JSON, YAML or YAML front matter.


Type: String Default: undefined

The directory to use as the "cwd" for layouts. When this option is defined, layouts may be defined using only the name of the layout.


Type: String Default: undefined

If set, this defines the layout file to use for the task or target. However, when specifying a layout, unlike Jekyll, Assemble requires a file extension since you are not limited to using a single file type.


Type: String Default: undefined

Specify the extension to use for layouts, enabling layouts in YAML front matter to defined without an extension:

layout: default

Type: String|Array Default: undefined

Specifies the Handlebars partials files, or paths to the directories of files to be used.


Type: String|Array Default: handlebars-helpers

Path to the custom helper or helpers to use with the current template engine.

Assemble includes handlebars-helpers as a dependency, so any helpers from that library may be used in your templates.


Type: Function Default: undefined

Function to use for post-processing generated HTML. Example:

options: {
  postprocess: function(src) {
    return require('frep').replaceStr(src, [
        // replace "then" with "now"
        pattern: "then",
        replacement: "now"
        // replace "Ruby" with "JavaScript"
        pattern: "Ruby",
        replacement: "JavaScript"
        // replace "Jekyll" with "Assemble"
        pattern: "Jekyll",
        replacement: "Assemble"

Type: String Default: .html

Specify the file extension for destination files. Example:


Type: Object Default: Marked.js defaults

Specify the Marked.js options for the {{#markdown}}{{/markdown}} and {{md ""}} helpers to use when converting content.


Type: String Default: Handlebars only use this option if you are not using Handlebars

Specify the engine to use for compiling templates if you are not using Handlebars. Currently, Handlebars is already set by default, but assemble-swig is available for compiling Swig Templates.


Type: Boolean Default: false

Remove anything after (and including) the first . in the destination path, then append this value. In other words, when files are generated from different source folders this "flattens" them into the same destination directory. See [building the files object dynamically][files-object] for more information on files formats.

Visit Assemble's documentation for more information about options.

Usage Examples

Simple example of using data files in both .json and .yml format to build Handlebars templates.

assemble: {
  options: {
    data: 'src/data/**/*.{json,yml}'
  docs: {
    files: {
      'dist/': ['src/templates/**/*.hbs']

Using multiple targets

assemble: {
  options: {
    assets: 'assets',
    layoutdir: 'docs/layouts'
    partials: ['docs/includes/**/*.hbs'],
    data: ['docs/data/**/*.{json,yml}']
  site: {
    options: {
      layout: 'default.hbs'
    src: ['templates/site/*.hbs'],
    dest: './'
  blog: {
    options: {
      layout: 'blog-layout.hbs'
    src: ['templates/blog/*.hbs'],
    dest: 'articles/'
  docs: {
    options: {
      layout: 'docs-layout.hbs'
    src: ['templates/docs/*.hbs'],
    dest: 'docs/'

Visit Assemble's documentation for many more examples and pointers on getting started.


Please see the Contributing to Assemble guide for information on contributing to this project.


Jon Schlinkert

Brian Woodward

Release History

  • 2013-10-03   v0.4.10   Adds plugin support to Assemble! using the plugins option.
  • 2013-10-02   v0.4.9   Adds layoutext and postprocess options.
  • 2013-09-30   v0.4.8   Assemble now builds 30-50% faster due to some refactoring to async and how context is calculated.
  • 2013-09-20   v0.4.7   Adds grunt-readme to make it easier to keep the readme updated using templates. Keep options.partials intact so they can be used in helpers.
  • 2013-09-15   v0.4.6   Updating how the assets path is calculated. Adding resolve-dep and ability to load helpers from node modules using minimatch patterns
  • 2013-09-03   v0.4.5   Bug fix: allow page content containing $. Add alias metadata for data on pages configuration object.
  • 2013-08-01   v0.4.4   Adds "nested layouts" Adds option for pages in JSON/YAML collections to be defined as either objects or keys in an array.
  • 2013-08-01   v0.4.3   Adds "options.pages" for passing in an array of pages in JSON or YAML format.
  • 2013-06-20   v0.4.0   Adds "layoutdir" option for defining the directory to be used for layouts. If layoutdir is defined, then layouts may be defined using only the name of the layout.
  • 2013-06-10   v0.3.81   Adds additional ways to load custom helpers. Now it's possible to use a glob pattern that points to a list of scripts with helpers to load. Adds examples and tests on how to use the new custom helper loading methods.
  • 2013-06-01   v0.3.80   Fixing bug with null value in engine
  • 2013-05-07   v0.3.77   Updated README with info about assemble methods
  • 2013-04-28   v0.3.74   Updating the assemble library to use the assemble-utils repo and unnecessary code.
  • 2013-04-21   v0.3.73   Fixing how the relative path helper worked and showing an example in the footer of the layout. This example is hidden, but can be seen by doing view source.
  • 2013-04-20   v0.3.72   Fixing the layout override issue happening in the page yaml headers. Something was missed during refactoring.
  • 2013-04-19   v0.3.9   Adds tags and categories to the root context and ensure that the current page context values don't override the root context values.
  • 2013-04-18   v0.3.8   Updating to use actual assets property from current page.
  • 2013-04-17   v0.3.7   Cleaning up some unused folders and tests
  • 2013-04-16   v0.3.6   Fixed missing assets property.
  • 2013-04-16   v0.3.5   Adds a sections array to the template engine so it can be used in helpers.
  • 2013-04-11   v0.3.4   More tests for helpers and global variables, organized tests. A number of bug fixes.
  • 2013-04-06   v0.3.3   helper-lib properly externalized and wired up. Global variables for filename, ext and pages
  • 2013-03-22   v0.3.22   Merged global and target level options so data and partial files can be joined
  • 2013-03-22   v0.3.21   Valid YAML now allowed in object (along with JSON)
  • 2013-03-18   v0.3.14   new relative helper for resolving relative paths


Copyright (c) 2013 Sellside Inc. Released under the MIT License.

This file was generated on Tuesday, October 22, 2013.

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