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17.8.0 • Public • Published

ya# Local component library

npm version

Welcome to the official component library for Local!

What's included in this component library?

We appreciate curious minds and that's a great question! Take a quick look at our living component documentation here.

In additional to a quickly growing set of React components, we also have SVGs, SASS partials, and more to come!


The quickest way to work on local-components is to leverage Storybook. Storybook is a local development area that works well with React components and supports hot-module reloading.

To start Storybook, run yarn storybook. Or, from the root of Local, run nps storybook.

Developing within Local

local-components is now a workspace of Local core, meaning you can just develope normally with nps build.dev to get the package built and under watch mode. yarn install takes care of all the symlinks for us, so long as the versions in the root and package's package.json match.

Digging deeper

The local-components library can be broken down into 3 main parts:

  1. Components
  2. Styles
  3. SVGs


These are the visual elements that make up both Local and its Add-ons. There are currently 40+ React components in the library. Each component consists of a .tsx, index.js, README.md and optional .sass file.

Try it out for yourself!

  1. Make changes to the internals of a component through its .tsx and .sass files (they should live reload)
  2. Play around with the examples found in the README.md files

Note: the entry point for all components and styles is index.ts.

Containers Wrapper

Several components leverage the Container.tsx component to wrap their own implementation. Container is a highly specialized component that can be toggled on (wraps contents in extra div) or toggled off (no extra div). In addition, the Container wrapper adds convenience props that allow for easy one-off adjustments like adding 3px of margin without conflicting with the inner content's classes and styles.

Note: setting any of container's props will automatically toggle it on (disabled: false) thus wrapping the contents in the container wrapper.


Components are organized by type. These type groups can be seen when running Storybook.


Suit CSS

Naming is hard. And there's no perfect system. That said, we have chosen Suit CSS for naming conventions.

Note: instead of dashes, local-components uses underscores due to a limitation of a legacy package.

CSS Modules

The component library leverages CSS Modules to manage and scope styles. These are considered local styles (not to be confused with the Local app 😉) Scoped local styles are a beautiful thing that allow Local to isolate components, run Add-ons with multiple versions of local-components and avoid collisions.

As wonderful as local styles are, there are instances where CSS needs to transcend a single component. For that, we make use of global styles. Global styles should be familiar to most as that's what the web largely used for 20+ years. Global styles are intended to be used sparingly as they introduce a lot of challenges when scaling an app with a library of Add-ons and Environments.

The following is an instance where a scoped component may use a combination of local and global styles to achieve a specific result:

:global(.WindowsToolbar .DragRegion)

This is something we try to avoid and are actively working to whittle down to the bare essentials.

If you'd like to learn more about scoped styles, please check out CSS Modules here.

Webpack compiles all styles down to scoped.css, which is included in the <style> tags of the Core app's browser windows HTML.

SASS Partials, Mixins, and Functions

There is an extensive sass system in use that many -- if not most -- components leverage.


If you search for the _partials directory, you will find variables, mixins, functions, and other shared resources.


If Local uses a color, it's defined as a variable within the _variables.scss file. In addition, there are fonts, font sizes, font weights, and margin/padding preset values here.

Note: font sies and margin/padding uses t-shirt sizes to indicate relative sizing while adhering to strict design standards/values.


Local has both light and dark modes. Since this impacts every single components, the _theme.scss file contains mixins that simplifies the implementation of these variations in a repeatable and predictable way.

While you could leverage if-theme-light and if-theme-dark directly, most light/dark combinations follow a specific pattern and therefore have dedicated mixin. For example, the theme-color-black-else-white mixin applies the color style of black (if light) otherwise white (if dark). Another example, the theme-background-green-else-graydark mixin applies the background style of green (if light) otherwise graydark (if dark).

Note: light/dark mode styles are applied by toggling a class added to the html element (e.g. Theme__Light).


Coming soon!






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