Skip to content


Subversion checkout URL

You can clone with
Download ZIP
class-based, evented front-end library
HTML JavaScript CSS

Fetching latest commit…

Cannot retrieve the latest commit at this time


A library of front end classes.


Bolt has submodules. You're probably going to want to clone it with the recursive flag:

git clone --recursive


Bolt sets up a useful baseline for building interfaces on top of.

  • Normalises for usefuleness. Bolt sets the box model to border-box across the board.
  • Descriptive classes define layout techniques and interactives.
  • Optional typography stylesheets set up a vertical rhythm.
  • No floats. Inline-blocks are preferred over floats for horizontal layout, leaving floats to be used what they were desgned for. Floating.
  • No colour. Themes change between projects, layout techniques generally don't.
  • Clean CSS. IE hacks are included as seperate stylesheets.

Layout classes


A container that automatically centres itself horizontally. Acts as a position parent.

The main wrap for a site is often called .site_wrap. Because all site_wraps will have the same width, content can be split into multiple site_wraps but still retain the look of being in one 'column'. Splitting content areas like this is great for responsively, because it allows for repositioning of various regions at different viewport sizes.


A layer will fill it's position parent. Typically, it is used behind a .dialog to cover the page behind. Layers are absolutely positioned, so they are not in the flow. By default a layer is scrollable, in case the content put inside it is too big for it.


.block is for layout. There are two ways a block is styled: as a block, for a vertical layout, or as inline-block, for a horizontal layout. Nomally blocks start with vertical layout in a narrow viewport and switch to horizontal when the viewport is wider:

There are techniques for changing the block order of inline-blocks using a combination of left, margin-left, width and margin-right rules. These can appear hairy to the unwary, so f you are going to use these, you must comment your styles to explain what's going on.


.index resets the default styles of a list such as a <ul>, <ol> or <dl>, enabling them for use as lists or grids of thumbs, button or whatever.

<li>s inside of lists are considered as part of their parents containers, so they are always styled with a child selector that associates them to the index:

.buttons_index > li {
    margin-bottom: 0.4em;


A component that describes a profile of a person or object, typically with a thumb, title and description.


A thumb hides it's inner text, displaying only it's background-image. Overflow is hidden and padding-top is used to determine it's height.


Buttons have centred text with automatic ellipsis.

Interactive classes


Include bolt.dialog.js

.popdown, .dropdown

Include bolt.dropdown.js

For making menus and whatnot. Popdowns close when clicked outside, whereas dropdowns also close when clicked.


Include bolt.slide.js

A block that slides to reveal it's sibling.



A block that fades to reveal it's sibling.


Include bolt.tip.js

A tip is hidden by default, and made visible when hovering over something that references it by id.

Utility classes


The ubiqiutous clearfix class

.scroll, .x_scroll, .y_scroll

Force scrollbar display

State classes

State classes should never be styled directly, as they are applied to indicate the state of some other class.

/* State classes:


State of items requested from a server


On/off state for .tab, .slide, .dropdown, .dialog-layer, .tip and other interactive classes


Used in forms to style blocks or inputs when an input has errors.


Applied to the element to flag CSS support.

Something went wrong with that request. Please try again.