diff --git a/src/stories/Tokens/Typography/FontFamily.mdx b/src/stories/Tokens/Typography/FontFamily.mdx index c7047e3..9f7b332 100644 --- a/src/stories/Tokens/Typography/FontFamily.mdx +++ b/src/stories/Tokens/Typography/FontFamily.mdx @@ -6,9 +6,11 @@ import { DesignTokenDocBlock } from 'storybook-design-token' # Font Family -The Font Family token can be used to change the font used when displaying text +Font Family tokens can be used to change the font used when displaying text. -Noto Sans and Noto Serif are both loaded via the Google Fonts CDN with Noto Sans as the default. +Optics loads fonts via the Google Fonts CDN. For instructions and further learning, see [Google Fonts](https://fonts.google.com/) + +The default font is set to Noto Sans with an alternate option set to Noto Serif. ```css @import 'https://fonts.googleapis.com/css2?family=Noto+Sans:ital,wdth,wght@0,62.5..100,100..900;1,62.5..100,100..900&family=Noto+Serif:ital,wdth,wght@0,62.5..100,100..900;1,62.5..100,100..900&display=swap'; @@ -29,6 +31,65 @@ html { } ``` +## Variable Fonts + +Optics supports variable fonts. Variable fonts are a single font file that contains multiple variations of a font. This allows you to adjust various axes that the font makes available such as the weight, width, slant, and other properties. + +Optics uses Noto Sans as a default which has three axes of variations: weight, width, and italic. You can adjust these axes using the font-weight, font-stretch, and font-style tokens. + +```css +.my-selector { + font-family: var(--op-font-family); // Defaults to "Noto Sans" + font-optical-sizing: {auto|none}; + font-weight: {100 to 900}; // Any value will work, though it is recommended to use the existing weight tokens or define a component specific value. + // E.G. font-weight: var(--op-font-weight-bold); + font-style: {normal|italic}; + font-variation-settings: + "wdth" {62.5 to 100}; + // or + font-stretch: {62.5% to 100%}; +} +``` + +If you are using a custom font, you can adjust the axes of the font by using the font-variation-settings property. The values for the axes are specific to the font you are using. You can find the available axes and their values in the font's documentation. + +For example: [Roboto Flex](https://fonts.google.com/specimen/Roboto+Flex) has the following axes. + +```css +// : Use a unique and descriptive class name +// : Use a value from 100 to 1000 +// : Use a value from -200 to 150 +// : Use a value from -10 to 0 +// : Use a value from 25 to 151 +// : Use a value from 27 to 175 +// : Use a value from 25 to 135 +// : Use a value from 323 to 603 +// : Use a value from 528 to 760 +// : Use a value from 416 to 570 +// : Use a value from 649 to 854 +// : Use a value from -305 to -98 +//
: Use a value from 560 to 788 + +.roboto-flex- { + font-family: 'Roboto Flex', sans-serif; + font-optical-sizing: auto; + font-weight: ; + font-style: normal; + font-variation-settings: + 'slnt' , + 'wdth' , + 'GRAD' , + 'XOPQ' , + 'XTRA' , + 'YOPQ' , + 'YTAS' , + 'YTDE' , + 'YTFI'
, + 'YTLC' , + 'YTUC' ; +} +``` + ## Available tokens and their definitions