Font Fallbacks

Font fallbacks are a common practice in code to ensure the text remains readable even when the primary font is unavailable.

"A fallback font is a font face that is used when the primary font face is not loaded yet, or is missing glyphs necessary to render page content. For example, the CSS below indicates that the sans-serif font family should be used as the font fallback for Roboto" - Chrome for Developers

While Figma doesn't natively support font fallbacks, Tokens Studio allows you to define fallbacks for Font Family and Font Weight Token Types.

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In the plugin

To define a fallback using the plugin, you can write the Token's value using the no-code or interface or modify the JSON file with comma-separated values.

Font Family Tokens

To implement font fallbacks in your Font Family Token:

• Use a comma-separated list in your token value.

• Write the Font name (string value) in order of preference, from primary to fallback options.

  • Be sure to follow the guidelines for best practices outlined in the Font Family Token documentation. #add-doc-link/typography

• Figma will use the first Font Family in the list.

Example:

{
  "sans-serif": {
    "$value": "Arial, Helvetica",
    "$type": "fontFamilies"
  }
}

Typography Composite Tokens

When using Typography Composite Tokens, you can reference a Font Family Token that includes fallbacks:

{
  "body-text": {
    "value": {
      "fontFamily": "{sans-serif}",
      "fontSize": "16px",
      "fontWeight": "400"
    },
    "type": "typography"
  }
}

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Limitations and Considerations

Figma will only display the primary font, not the fallbacks.

• When exporting to Figma variables or styles, only the primary font will be used.

• Fallbacks are primarily for web and application development, not for use within Figma itself.

While it might be tempting to use fallbacks as a way to work around Figma's nuanced way of Font Weight + Style values as a combined string, which is written differently for each Font Family, we don't recommend this approach.

• We will always pass the first value to Figma, so if it doesn't match, you'll still get the error even if you included the correct value as a fallback.

• Tokens are intended to be used in code, which isn't as particular as Figma. So when you engineers receive a Font Weight Token with the same value repeated multiple times it might lead to unexpected results.

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Transforming Tokens

Engineers typically transform Tokens used in code with Style Dictionary, which is tool-agnostic. Tokens coming from Tokens Studio require an additional step: @Tokens-studio/sd-transforms, an npm package that prepares Tokens for Style Dictionary.

When transforming tokens for use in code, the Style Dictionary handles font fallbacks appropriately:

• fontFamily Tokens that contain multiple values (comma separated) will be processed slightly for CSS to ensure that when a Font Family name contains spaces, the value is put in quotes ' so it works in CSS.

→ Style Dictionary - Built in Transforms fontFamily/CSS

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Resources

Mentioned in this doc:

• SD-Transforms - Read Me

• Style Dictionary - https://styledictionary.com/

CSS resources:

• Chrome Developer Docs - Improved Fallback Fonts

• MDN Web Docs - font-family

• CSS-Tricks - CSS Basics: Fallback Font Stacks for More Robust Web Typography

Community resources:

• None yet!

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Known issues and bugs

Tokens Studio Plugin GitHub - Tokens Studio Plugin GitHub - Open issues for Token Type Font Family

🐞 If you are experiencing an issue not listed here, please reach out to us on the Troubleshooting channel of our community Slack, submit it on our feedback tool, or send us an email [email protected]

Requests, roadmap and changelog

• None

💌 Visit https://feedback.tokens.studio/ to contribute or subscribe to updates.