Fonts and icons

The point of the Jambonz UI library is for jambonz apps to be "on brand" and share a cohesive foundational design system. With that in mind, the official font family for jambonz is called Objectivity. Objectivity is a free, open-source font available for download online. The UI kit provides the font files already optimized for web use in the woff format. Jambonz doesn't utilize every member of the font family but you can view the full font specimen here.

Available fonts for web use:
Font File SASS Variable
Objectivity Regular objectivity-regular-webfont.woff(2) $font-regular
Objectivity Regular Slanted objectivity-regularslanted-webfont.woff(2) $font-regular-italic
Objectivity Medium objectivity-medium-webfont.woff(2) $font-medium
Objectivity Medium Slanted objectivity-mediumslanted-webfont.woff(2) $font-medium-italic
Objectivity Bold objectivity-bold-webfont.woff(2) $font-bold
Objectivity Bold Slanted objectivity-boldslanted-webfont.woff(2) $font-bold-italic
Loading the fonts

Fonts can be copied from the package to your static public directory. This can be done manually, at installation time or during app bundling depending on your preference. The package provides a singular public directory that consists of all static assets: CSS, JS and fonts. You can literally

You can even support browser preload for the fonts which will optimize the performance even more since the UI library ships with font-display: swap already. In your HTML <head> you can add some variation of this depending on which fonts render above the fold.

<link rel="preload" href="/fonts/objectivity-medium-webfont.woff2" crossOrigin="anonymous" as="font" type="font/woff" />
<link rel="preload" href="/fonts/objectivity-bold-webfont.woff2" crossOrigin="anonymous" as="font" type="font/woff" />
<link rel="preload" href="/fonts/objectivity-regular-webfont.woff2" crossOrigin="anonymous" as="font" type="font/woff" />
<link rel="preload" href="/fonts/objectivity-boldslanted-webfont.woff2" crossOrigin="anonymous" as="font" type="font/woff" />
<link rel="preload" href="/fonts/objectivity-regularslanted-webfont.woff2" crossOrigin="anonymous" as="font" type="font/woff" />

For this Next.js app you're on right now we do this with the postinstall script in the package.json file. We are also opting to ignore the fonts directory inside of public since the fonts are always copied during install which works locally and in CI.

  "scripts": {
    "postinstall": "rm -rf public/fonts && cp -R ./node_modules/jambonz-ui/public/fonts ./public/fonts"

Of course you can serve them statically in development and bundle them at build time if you're using a tool like webpack. See the documentation on devServer and check out the copy-webpack-plugin for resources on how to handle this.

Example of dev server config:

module.exports = {
  // ...
  devServer: {
    static: [path.resolve(__dirname, 'node_modules/jambonz-ui/public')],

Example of copy plugin config:

module.exports = {
  // ...
  plugins: [
    new CopyWebpackPlugin({
      patterns: [
          from: path.resolve(__dirname, 'node_modules/jambonz-ui/public'),
          // If you would like to omit the CSS/JS and only copy fonts
          globOptions: {
            ignore: ['**/css/**', '**/js/**'],
Feather icons

Jambonz UI utilizes feathericons, an open-source icon library available in many formats for implemention into frontend stacks. Feather has 280+ available icons and the UI library is designed to work with react-feather. By default the UI library doesn't import any icons from feather, however it declares react-feather as a peer dependency. This means you can import just the icons you are using in your jambonz app. This allows for tree-shaking to ake effect and ensures we don't load extra bloat into our dist JS that isn't explicitly used. There is an Icon component that renders a stylized design icon with many visual variations.

You can see how we import the feather icons used on this site here.

Prev: Getting started Next: Styles