Responsive CSS, HTML and JavaScript front-end starting point.
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Imarc Boilerplate is a light, customizable frontend starter kit and component library. It helps jumpstart and optimize frontend development. With its light design and lack of rigid grid framework, we are able to port it to various creative designs.

Supported Browsers: IE11+, Chrome, Firefox, and Safari.

Get Started

To get started working with Boilerplate, you should have node installed. Installing node will automatically give you npm. Alternatively, if you have Homebrew, you can install node via Homebrew.

npm install
npm run watch

The npm run watch command will watch all your files and run BrowserSync, both compiling SCSS and reloading your browser on any changes.

After launching, view in your browser at localhost:3000.


Consistent, clean markup

An important goal of Boilerplate is to build internal HTML and SCSS conventions. If everyone working on a project knows Boilerplate is the foundation, then our HTML and SASS will be clean and consistent.

Works as a placeholder

Boilerplate is not meant to be the final look and feel that a site would launch with. It is meant to act a placeholder that

  • Serves as the starting point for frontend development.
  • Provides a client-friendly appearance that isn’t distracting that we can use for prototypes and sites in progress.
  • Has tolerable defaults for elements that might not be styled in the normal build-out of a project (tables, typographical elements like sup/sub/pre, etc.)

Light and Semantic

Boilerplate aims to be lighter and more semantic than other frameworks such as Bootstrap. We try to avoid using non-semantic class names when we can, which means that we do not have a grid system. Boilerplate is meant to encourage great markup.

Mobile friendly, mobile first

Boilerplate is ready for the mobile world. It was built to be ‘mobile first’ from the ground up. We have basic small, medium, and large breakpoint styles.


Components are pre-defined user interface elements that web authors can use as a starting point during frontend development. Most of these are powered via SASS mixins found in the _components.scss file. Some components also rely on JavaScript plugins in addition to or instead of the mixins. Relevant JavaScript is found in the js directory.

Using components in a project

Include _components.scss into your styles.scss file. All component mixins should be called from the main styles.scss file.

Custom arguments

Some components have default SASS keyword arguments. These can and should be overridden to better achieve your design. For example, the tiles component is a multi-row layout, similar to a grid. By default, including the tiles mixin will result in a four column layout with 2rem-wide gutter spacing.

@mixin tiles($gutter: 2rem, $columns: 4) { … }

Pass in values of your choice.

.products {
  @include tiles($gutter: 66px, $columns: 3)

Extending components

The _components.scss file can be edited on a project-by-project basis in order to best fit your project. If your new or modified components are different than what came “out of the box”, please comment above each relevant mixin. Ask yourself “Would another Imarc engineer be able to quickly understand what my project’s component does?” If the answer is no, comment and describe.

Example of an extended component

.tiles {
    @include tiles($gutter: 6rem, $columns: 3);
    > * {
        background-color: $brand-blue;
        border-left: 6px solid #FFF;
        border-right: 6px solid #FFF;
        color: #FFF;
        margin-bottom: 2rem;
    h3 {
        background-color: $brand-blue-dark;
        color: $brand-blue-light;
        display: inline-block;
        font-size: 1rem;
        margin-bottom: 0.5rem;
        text-transform: uppercase;

Improving components

Components are not perfect and will need continual maintenance and improvement. If you feel a Component needs attention, please create a pull request with your improvements you feel can be merged in, or submit an issue.

Documentation for Components is generated using SassDoc and can be found in the sassdoc folder or viewed online.

Updating the Docs

If you make changes to Components’ code, you can regenerate the documentation by running

npm run docs


Items worth calling out in Boilerplate’s stylesheet:


Boilerplate makes wide use of SASS variables. Declare variables at the top of the styles.scss file. These will certainly change per project. Note, media query breakpoint values are used here as well:

$medium: 669px;
$large: 1024px;


Sass mixins are important and live in their own section. Some heavily used mixins are:


@button and .button are used to style primary call-to-action anchors and buttons.


@container and .container are used to identify elements that should match the width of the page. .container should not be used for styling. It is a dedicated site container class. Our site container is 1200 pixels wide (1150 pixels after left and right padding).


@columns and .columns make direct children behave as columns, as a cleaner alternative to defining classes such as .one_of_three, or .second.fifth. To create gutters between columns, use hr elements. This is a semantically appropriate use of the hr tag, and allows for greater flexibility in controlling and styling the gutter. By default, these gutters are 16px wide.


@grouping and .group are used to make sure the container clears all of its floated children. They are a cleaner alternative to empty clearfix div elements.

No Bullets

@no-bullets removes default styling to ordered/unordered lists.


This section contains the majority of a project’s styles. Need to set the widths for main and aside.primary elements? This goes in Layout. Styling a featured blog post callout? Put it in Layout.


Intro and Highlight

.intro and .highlight are two semantic classes:

  • Intro is used to identify a section or paragraph of introductory, overview, or abstract content before the main content.
  • Highlight is used to for callouts or highlighting specific snippets of text.


Boilerplate uses Font Awesome for iconography. Use the dedicated @fontawesome mixin or utilize official Font Awesome markup:

<i class="fa fa-caret-square-o-right" aria-hidden="true"></i>


This section is used for marking up server generated success, info, and error messages, as well as help messages typically found in forms.

Media Queries

We utilize three breakpoints – small, medium, and large. Please keep all media query properties in this area. WHhile there can be benefits of breaking in and out of media queries throughout a stylesheet, we have no yet standardized a way that is helpful for all engineers.


Boilerplate is released under the Apache License v2.0. See LICENSE.