There are many ways to include CSS in a web application, and correspondingly there are many ways to include CSS in Storybook. Usually, it is best to try and replicate what your application does with styling in Storybook’s configuration.
CSS-in-JS
CSS-in-JS libraries are designed to use basic JavaScript, and they often work in Storybook without any extra configuration. Some libraries expect components to render in a specific rendering “context” (for example, to provide themes), and you may need to add a global decorator to supply it.
Importing CSS files
If your component files import their CSS, Storybook's webpack configuration will work out of the box. The noticeable exception to this is if you're using a CSS precompiler. In this case, you can either install and configure a Storybook preset (e.g., SCSS preset), or customize Storybook's webpack configuration and include the appropriate loader.
To use your CSS in all stories, you import it in .storybook/preview.js
Adding webfonts
If you need webfonts to be available, you may need to add some code to the .storybook/preview-head.html file. We recommend including any assets with your Storybook if possible, in which case you likely want to configure the static file location.
