postcss-quantity-queries

[![npm version][npm-image]][npm-url]
[![Build Status][travis-image]][travis-url]
[![Coverage Status][coveralls-image]][coveralls-url]

> [PostCSS] plugin enabling quantity-queries.

This plugin is derived from the Sass [Quantity Queries mixins] by Daniel Guillan.
For informations about quantity queries check those resources:
[Quantity Queries for CSS][]
[Styling elements based on sibling count][]
[Daniel’s demo on CodePen][]

Installation

``
npm install postcss-quantity-queries --save-dev
`

Usage

`js
const fs = require('fs');
const postcss = require('postcss');
const quantityQueries = require('postcss-quantity-queries');

const input = fs.readFileSync('input.css', 'utf8');

postcss()
.use(quantityQueries)
.process(input)
.then(result => {
fs.writeFileSync('output.css', result.css);
});
`

API

$3

Target count items or more:
`css
:at-least(count) { ... }
`
input:
`css
ul > li:at-least(4) {
color: rebeccapurple;
}
`
output:
`css
ul > li:nth-last-child(n+4),
ul > li:nth-last-child(n+4) ~ li {
color: rebeccapurple;
}
`

$3

Target count items or less:
`css
:at-most(count) { ... }
`
input:
`css
ul > li:at-most(4) {
color: rebeccapurple;
}
`
output:
`css
ul > li:nth-last-child(-n+4):first-child,
ul > li:nth-last-child(-n+4):first-child ~ li {
color: rebeccapurple;
}
`

$3

Target a range of items between start and end:
`css
:between(start, end) { ... }
`
input:
`css
ul > li:between(4, 6) {
color: rebeccapurple;
}
`
output:
`css
ul > li:nth-last-child(n+4):nth-last-child(-n+6):first-child,
ul > li:nth-last-child(n+4):nth-last-child(-n+6):first-child ~ li {
color: rebeccapurple;
}
`

$3

Target exactly count items:
`css
:exactly(count) { ... }
`
input:
`css
ul > li:exactly(4) {
color: rebeccapurple;
}
`
output:
`css
ul > li:nth-last-child(4):first-child,
ul > li:nth-last-child(4):first-child ~ li {
color: rebeccapurple;
}
`

$3

Selector | Description
---|---
# :at-least(count) { … } | Target count items or more
# :at-most(count) { … } | Target count items or less
# :between(start, end) { … } | Target a range of items between start and end
# :exactly(count) { … } | Target exactly count items

At-rule API

There is also an at-rule API available, similar to pre-processors.
Although it might get deprecated at some point.
The recommended API is the pseudo-selectors one.

`css
@at-least count [, selector] { ... }
`
`css
@at-most count [, selector] { ... }
`
`css
@between start end [, selector] { ... }
`
`css
@exactly count [, selector] { ... }
`

`css
ul > li {
@at-least 4 span {
color: rebeccapurple;
}
}

ul > li {
@between 4 6 {
color: rebeccapurple;
}
}
``

Check out the tests for more examples.

Credits

* Pascal Duez

Licence

postcss-quantity-queries is unlicensed.

[PostCSS]: https://github.com/postcss/postcss
[Quantity Queries mixins]: https://github.com/danielguillan/quantity-queries
[Quantity Queries for CSS]: http://alistapart.com/article/quantity-queries-for-css
[Styling elements based on sibling count]: http://lea.verou.me/2011/01/styling-children-based-on-their-number-with-css3
[Daniel’s demo on CodePen]: http://codepen.io/danielguillan/pen/GgBOxm

[npm-url]: https://www.npmjs.org/package/postcss-quantity-queries
[npm-image]: http://img.shields.io/npm/v/postcss-quantity-queries.svg?style=flat-square
[travis-url]: https://travis-ci.org/pascalduez/postcss-quantity-queries?branch=master
[travis-image]: http://img.shields.io/travis/pascalduez/postcss-quantity-queries.svg?style=flat-square
[coveralls-url]: https://coveralls.io/r/pascalduez/postcss-quantity-queries
[coveralls-image]: https://img.shields.io/coveralls/pascalduez/postcss-quantity-queries.svg?style=flat-square
[depstat-url]: https://david-dm.org/pascalduez/postcss-quantity-queries
[depstat-image]: https://david-dm.org/pascalduez/postcss-quantity-queries.svg?style=flat-square
[license-image]: http://img.shields.io/npm/l/postcss-quantity-queries.svg?style=flat-square
[license-url]: UNLICENSE