@guardian/pasteup v2.0.0-alpha.2

Pasteup

The Guardian Design Tokens are intended to be used in conjunction with a CSS-in-JS library such as Emotion.

Under construction 🚧

This file documents the current version of Pasteup. This package is still under heavy construction, please do not install this in applications intended for use in production. The API may change significantly before it is out of alpha.

Motivation

For an introduction to the origins of Pasteup, see Motivation.

Usage

This section gives examples of the current usage of Pasteup

Breakpoints

Example

import { desktop } from '@guardian/pasteup/breakpoints';

const wrapper = css`
    ${desktop} {
        max-width: 620px;
        margin-right: 310px;
        padding-left: 10px;
    }
`;

Where desktop will be replaced by

@media (min-width: 980px)

Reference

The starting point is the base mapping (breakpoints)

The API exposes the following values:

1. mobile, mobileMedium, mobileLandscape, phablet, tablet, desktop, leftCol and wide. For instance, mobile is replaced by

   @media (min-width: 980px)

2. until.[symbol], where symbol ranges over the constants in subsection 1). For instance, until.desktop is replace by

   @media (max-width: 979px)

3. from.[symbol1].until.[symbol2], where symbol ranges over the constants in subsection 1). For instance, from.tablet.until.desktop is replaced by

   @media (min-width: 740px) and (max-width: 979px)

Fonts

import { textSans } from '@guardian/pasteup/typography';

const footer = css`
    ${textSans(6)}
    margin-top: 20px;
`;

Note the use of the function textSans imported from typography.

typography exposes three functions: headline, body and textSans, all taking a number/integer and returning a CSS string. For instance

textSans(2) =
font-size: 13px; line-height: 18px; font-family: GuardianTextSans, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif

The current mapping is hardcoded in the code of typography and is:

const fontScaleMapping: any = {
    headline: {
        1: { fontSize: 14, lineHeight: 18 },
        2: { fontSize: 16, lineHeight: 20 },
        3: { fontSize: 20, lineHeight: 24 },
        4: { fontSize: 24, lineHeight: 28 },
        5: { fontSize: 28, lineHeight: 32 },
        6: { fontSize: 32, lineHeight: 36 },
        7: { fontSize: 36, lineHeight: 40 },
        8: { fontSize: 40, lineHeight: 44 },
        9: { fontSize: 44, lineHeight: 48 },
    },
    body: {
        1: { fontSize: 14, lineHeight: 20 },
        2: { fontSize: 16, lineHeight: 24 },
        3: { fontSize: 18, lineHeight: 28 },
    },
    textSans: {
        1: { fontSize: 12, lineHeight: 16 },
        2: { fontSize: 13, lineHeight: 18 },
        3: { fontSize: 14, lineHeight: 20 },
        4: { fontSize: 14, lineHeight: 22 },
        5: { fontSize: 16, lineHeight: 22 },
        6: { fontSize: 18, lineHeight: 18 },
        7: { fontSize: 20, lineHeight: 20 },
    },
};

// together with

`serif.headline`: `font-face: GH Guardian Headline, Georgia, serif`
`serif.body`: `font-face: GuardianTextEgyptian, Georgia, serif`
`sans.body`: `font-face: GuardianTextSans, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif`

This mapping may see adjustements in the future.

Mixins

import { screenReaderOnly } from '@guardian/pasteup/mixins';

css`
    ${screenReaderOnly};
`;

Palette

import { palette } from '@guardian/pasteup/palette';

const footerLink = css`
    color: ${palette.neutral[100]};
    :hover {
        color: ${palette.highlight.main};
    }
`;