Shevy

Vertical rhythm made easy. Typography how you want it, where you want it.

Usage

Import lib/_shevy.scss into your project.

@import 'lib/shevy';

Define a $shevy: (); Sass map, like so:

$shevy: (
    base-font-size: 1em,
    base-line-height: 1.5,
    base-font-scale: (3, 2.5, 2, 1.5, 1.25, 1)
);

Call the headings mixin in your code

@include headings;

Marvel at your beautiful typography. Assuming you've put something on the page. You have put something on the page, haven't you?
You can also pass a custom map into the headings and paragraph mixin. This should enable you to make custom typography per module or responsive typography per breakpoint.

Defaults

$shevy: (
    base-font-size: 1em,
    base-line-height: 1.5,
    base-font-scale: (3, 2.5, 2, 1.5, 1.25, 1),
    paragraph-scale: false,
    margin-bottom: true
);

base-font-size

The base-font-size key is intended to be the standard font-size for the project. font-scale multiplies its value against the base-font-size.

base-line-height

The base-line-height is the standard line-height. If this is set in pixels, this will be the base-spacing value for Shevy. If it is provided as a factor, such as 1.5, it will be multiplied by the base-font-size to generate the base-spacing value.

base-font-scale

This is a Sass list of factors to multiply by the base-font-size to generate the font-sizes for headings and paragraphs (if a paragraph-scale is not provided).

paragraph-scale

This is intended for use in setting the size of the paragraph font-size, though by default is set to false. When set to false, Shevy uses the last value passed in the font-scale list to size the paragraph.

margin-bottom

By default, margin bottoms are added to all typography to maintain the vertical rhythm. However, you may wish to remove these. In that case, setting margin-bottom: false in your map will set the margin-bottom property to 0 for each element.

Support

Currently, Shevy supports px, em, and rem usage. Additional support for other measurement units may be added in the future.

Features to Add

Here are some features/situations we are hoping to account for in the near future.

Validation
Exception mixins — The ability to create font sizes that override the main typographical settings.
Recall mixins — If you use the font-size: 0 hack for inline-block layouts, we would like you to be able to write a simple mixin with a heading or paragraph to output the font-sizes for that. Ex: @include recall(h2).
Handle situations with less than 6 font-sizes
Add functionality for custom line-height-scale, similar to current implementation of font-size scale.
Dunno yet. What do you want?

pandroid / shevy