@leaflink/stash

Interactive building blocks for creating user interfaces.

Stash is a collection of primitive, product-agnostic elements that help encapsulate LeafLink's look and feel at base level. This project is intended to be used across our digital product portfolio.

Table of Contents

• Development Setup
  • Installing pnpm
  • Installing Dependencies
• Quick Start
• Usage
  • Example
  • npm scripts
• Legacy Styles
• Tailwind
  • Configuration
  • VSCode
• Resources
• Core files & Entry Points
• à la carte
• Peer dependencies
• Testing
  • Mocking Google Maps API when testing AddressSelect
• Assets
• Illustrations and Icons
  • Testing Icon's and Illustration's
• Contributing
• Architecture

Development Setup

This project uses pnpm as the package manager. Please ensure you have pnpm installed before contributing.

Installing pnpm

# Using npm
npm install -g pnpm

# Using Homebrew (macOS)
brew install pnpm

# Using curl
curl -fsSL https://get.pnpm.io/install.sh | sh -

Installing Dependencies

pnpm install

⚠️ Important: This project enforces pnpm usage. Other package managers (npm, yarn) will be blocked by the preinstall script.

Quick Start

Stash requires Vue 3 and Tailwind CSS v4. To get started, install the package and its peer dependencies:

npx install-peerdeps @leaflink/stash

Then, import the package and its styles in your app. Load the base and components styles from Stash, and then add your app's styles after them.

import { createApp } from 'vue';
import stash from '@leaflink/stash';

// stash styles
import '@leaflink/stash/styles/theme.css';
import '@leaflink/stash/components.css';

// app styles
import './app.css';

const app = createApp(App);

app.use(stash);

Your app styles should be loaded after the Stash styles to ensure that they override the Stash styles. Tailwind v4: Stash uses Tailwind v4 with CSS-first configuration. Simply import Stash's theme styles and add your content sources:

@layer theme, base, components, utilities;
@import 'tailwindcss/theme.css' layer(theme);
@import '@leaflink/stash/styles/backwards-compat.css' layer(base) source(none); /* optional */
@import '@leaflink/stash/components.css';
@import 'tailwindcss/utilities.css' layer(utilities) source(none);
@import '@leaflink/stash/styles/sofia-font.css' layer(base) source(none);
@import '@leaflink/stash/styles/theme.css';

/* Scan your app files for Tailwind classes */
@source "./src/**/*.{vue,ts,js}";

No tailwind.config.ts needed! See the Tailwind section and Tailwind v4 Migration Guide for more details.

[!NOTE] For apps still requiring deprecated css & utility classes, you can include the backwards compat styles from Stash:

import '@leaflink/stash/styles/backwards-compat.css'; // Add this line before the base and components styles.
import '@leaflink/stash/styles/sofia-font.css'; // Add this line before the base and components styles if you're using the Sofia font.
import '@leaflink/stash/styles/theme.css';
import '@leaflink/stash/components.css';
import './app.css';

Also, if you still need legacy Stash sass variables, functions, and mixins in your components, you can configure Vite to import them:

export default defineConfig(({ mode }) => {
  const env = loadEnv(mode, process.cwd(), '');

  return {
    css: {
      preprocessorOptions: {
        scss: {
          additionalData: '@use "sass:map"; @import "@leaflink/stash/styles/core";',
        },
      },
    },
  };
});

Usage

@leaflink/stash is a Vue component library that implements Leaflink's Stash Design System. So every one of LeafLink's colors, typography, shadows, etc. can be accessible via tailwind utility classes like text-blue-500 text-sm.

Stash is a Vue plugin that can be installed in your app. You do not need to install the plugin in order to use the components, but it is required if you need to configure the framework to suit your specific needs.

There are several options to configure the framework to suit your specific needs, and they are all optional. Any options you pass to the plugin will be merged with the default options & applied to the entire framework.

[!WARNING] If you don't install the plugin in your app, you will need to manually setup modals, toasts, and other features that require some setup that's normally done for you by the Stash plugin.

interface StashPluginOptions {
  /**
   * Translation options, language and locale
   */
  i18n?: I18nPlugin;

  /**
   * Setup methods to persist user-settings. There are several LocalStorage helpers which may be overridden
   */
  storage?: {
    set: <T = unknown>(name: string, data: T, options?: { [key: string]: unknown }) => void;
    get: <T = unknown>(name: string, options?: { [key: string]: unknown }) => T;
  };

  /**
   * Path to static assets such as icons and illustrations
   */
  staticPath?: string;

  /**
   * Image options
   */
  images?: StashOptionImages;

  /**
   * Google Maps API key
   */
  googleMapsApiKey?: string;

  /**
   * Modals options
   */
  modals?: false | ModalsPluginOptions;

  /**
   * Toasts options
   */
  toasts?: false | ToastsPluginOptions;
}

interface StashOptionImages {
  provider: StashImageProviders; // 'cloudinary' | 'static'
}

interface ModalsPluginOptions {
  mountNodeClass?: string;
  mountNodeId?: string;
}

interface ToastsPluginOptions {
  mountNodeClass?: string;
  mountNodeId?: string;
}

Example

A sample configuration might look something like:

// src/main.ts
import { createApp } from 'vue';
import stash from '@leaflink/stash';
import i18n, { locale } from 'path/to/i18n';

const app = createApp(App);

app.use(stash, {
  i18n: {
    locale,
    t: (key, value) => i18n.t(key, value),
  },
  googleMapsApiKey: import.meta.env.VITE_GOOGLE_MAPS_API,
});

This example will load the core i18n options and Google Maps api key.

npm scripts

Most operations are run using npm run and are defined in package.json. Check out the available scripts with npm run.

A few commonly used commands are:

• pnpm lint will lint all vue/js files with eslint & lint css with stylelint. Optionally you can just lint js or css with the lint:js and lint:css scripts respectively. You can run npm run lint --fix to auto-fix code styles.
• pnpm test <file> when we want to run a single spec during active development.
• pnpm test runs all unit and integration tests with Vitest. --watch is enabled by default and you can pass any other Vitest options to this script that you'd like.
• pnpm test:ci will run tests and generate coverage. Used in CI, but nothing stopping you from using it locally if you want to run with coverage.
• pnpm type-check will run the TypeScript compiler and perform a static analysis of the code and report any type errors it finds.
• pnpm build will build the application and prepare it for production.

Legacy Styles

@leaflink/stash exposes a stylesheet for backwards compatibility with legacy stash utilities. This stylesheet includes styles for components that have been deprecated or removed from the Stash Design System. It is not required for greenfield projects.

/* legacy stash styles - not required for greenfield projects */
import '@leaflink/stash/styles/backwards-compat.css';

/* legacy font styles - not required for greenfield projects (Use DM Sans instead) */
import '@leaflink/stash/styles/sofia-font.css';

/* stash styles */
import '@leaflink/stash/styles/theme.css';
import '@leaflink/stash/components.css';

import './app.css';

Tailwind

@leaflink/stash uses Tailwind behind the scene to style its components. It's currently required to run this library downstream in order to avoid issues with css duplication & ordering.

import Button from '@leaflink/stash/Button.vue';
import IconLabel from '@leaflink/stash/IconLabel.vue';

<Button icon-label class="hidden md:inline ml-3">
  <IconLabel icon="user-add" title="Add Recipient" size="dense" stacked>
    Add Recipient
  </IconLabel>
</Button>;

Configuration

Tailwind v4 Configuration:

Stash uses Tailwind v4 with CSS-first configuration. Import Stash's base styles in your main CSS file:

/* app.css */
@layer theme, base, components, utilities;
@import 'tailwindcss/theme.css' layer(theme);
@import '@leaflink/stash/styles/backwards-compat.css' layer(base) source(none); /* optional */
@import '@leaflink/stash/components.css';
@import 'tailwindcss/utilities.css' layer(utilities) source(none);
@import '@leaflink/stash/styles/sofia-font.css' layer(base) source(none);
@import '@leaflink/stash/styles/theme.css';

/* Scan your app files */
@source "./src/**/*.{vue,ts,js}";

/* Optional: Override theme values */
@theme {
  /* Use DM Sans instead of Sofia */
  --font-family-sans: 'DM Sans', sans-serif;
}

VSCode

To avoid warnings from VSCode (and Cursor) saying "Unknown at rule" for @reference, @apply, and others from tailwind:

1. Create a .vscode/ directory (it is gitignored)
2. Add a settings.json file inside of it unless one already exists
3. Create a custom-css.json file in the .vscode directory
4. In the custom-css.json file, copy-paste its content from here

Resources

• index.js: This is the "install" entry point, for use with app.use(...).
• components: All components
• composables: Similar to mixins or React's "Hooks", but for a Vue component
• constants: LeafLink global constants
• directives: Vue directives
• plugins: Vue plugins
• styles: SCSS, CSS, style utils, etc.
• types: TypeScript type declarations
• utils: Includes various helpers for internal and external use

Core files & Entry Points

index.js is used as the main entry point to the framework. It also exports each component individually, for an à la carte build. You may pull in the default export directly and app.use it (to quickly get up and running w/ all components and features); or, you may wish configure it with particular options, components, or features.

à la carte

@leaflink/stash serves its components and directives à la carte, which means that instead of importing the entire library, you selectively import only the specific components and directives that you need for your project. This approach helps reduce the bundle size of your application, resulting in faster load times and improved performance.

// Component.vue

import Select from '@leaflink/stash/Select.vue';

<Select></Select>;

// Component.vue

import autofocus from '@leaflink/stash/autofocus';

<button v-autofocus>Click</button>;

Peer dependencies

Peer dependencies are specific dependencies that a package requires to work correctly, but expects the consumer of the package to provide. In other words, they are dependencies that the package relies on, but are not bundled with the package itself.

@leaflink/stash project requires some peer dependencies:

• lodash-es: The utility library is required as a peer dependency as an optimization to reduce the bundle size. Required compatibility with this package on version ^4.x.

• tailwindcss: Our utility-first CSS framework used for building our responsive and customizable components. Required compatibility with this package on version ^4.x.x.

• vue: ^3.5.28 or higher. Older Vue versions (e.g. 3.5.13) can cause type errors when used with this package and other dependencies; consumers should use 3.5.28+ so the whole dependency tree uses a single compatible Vue.

• vue-router: The official router for Vue.js applications. Required ^4.6.4 or higher. Older versions (4.0–4.5) ship Vue types that conflict with Vue 3.5.28+ and cause TypeScript errors.

These peer dependencies need to be installed separately by the consumer of the package, ensuring that the correct versions are used to maintain compatibility and avoid conflicts with other dependencies in the project.

Testing

[!TIP] If you are contributing to @leaflink/stash, please refer to this contributing testing section for more details on how to properly test your changes.

To run tests, there's multiple npm scripts available to you:

• npm run test - Run all tests in watch mode.
• npm run test <file> - Run matching spec files quickly and watch for changes.
• npm run test:ci - Run tests and generate coverage. Used in CI, but nothing stopping you from using it locally if you want to run with coverage.

They all run Vitest but are typically used at different times because of the default Vitest options we're passing to them inside of the npm script. All of them allow you to pass any additional Vitest cli options that you'd like, i.e. npm run test -- --silent.

Testing Library truncates the output from tests, which can cut off large DOM elements logged to the console. This limit can be adjusted with the DEBUG_PRINT_LIMIT environment variable, which can be set either when running tests (DEBUG_PRINT_LIMIT=100000 npm run test) or added to your shell's profile (export DEBUG_PRINT_LIMIT=100000) to make it the default. For more on debugging with Testing Library, see official documentation.

Coverage HTML reports are written to ./coverage.

Run open ./coverage/index.html from the root of the repo to pop open the report in your browser of choice.

To test @leaflink/stash components, it's necessary to expose stash as a plugin on the global config test object.

// setup-env.ts

import stash from '@leaflink/stash';
import { config, flushPromises } from '@vue/test-utils';

config.global.plugins = [[stash, { googleMapsApiKey: 'my-key' }]];

Mocking Google Maps API when testing AddressSelect

When testing components that use the AddressSelect component or useGoogleMaps composable, it's necessary to mock it. This is because the useGoogleMaps composable uses the google.maps global object, which is not available in the testing environment.

The easiest way to do this is to mock the useGoogleMaps composable and avoid trying to mock the Google Maps API directly.

Create a file in the __mocks__ directory of the @leaflink/stash package, and mock the useGoogleMaps composable.

/* __mocks__/@leaflink/stash/useGoogleMaps.js */
export default function () {
  return {
    getPlaceDetails: vi.fn().mockResolvedValue({
      street_address: '123 Main St',
      extended_address: 'ap 802',
      city: 'New York',
      state: 'NY',
      postal_code: '10001',
      country: 'US',
    }),
    getPlacePredictions: () => {
      return Promise.resolve([{ id: '1', name: '123 Main St, ap 802, New York, US' }]);
    },
  };
}

/* tests/setup-env.ts */
import '@leaflink/dom-testing-utils/setup-env'; // to ensure lodash-es/debounce is mocked properly
vi.mock('@leaflink/stash/useGoogleMaps');

/* src/components/YourComponent.spec.ts */
const user = userEvent.setup();
// Start typing in the AddressSelect select input to trigger the useGoogleMaps mock response
await user.type(screen.getByPlaceholderText('Search'), 'type anything');
// The mock response will be used to populate the options - so it will always be the same
// (id of 1 from the getPlacePredictions mock)
await user.selectOptions(screen.getByLabelText('Bank address'), ['1']);

It's also encouraged the use of @leaflink/dom-testing-utils for testing utilities like global and local test setup, mocking endpoints, clean up components, get selected options and more. Checkout the documention for learning more about this package.

Assets

When using Stash, a collection of assets are available to use, such as icons and illustrations.

In order to configure the assets path for your project, you can do it via the staticPath option. By default, this property is set to the /assets path.

import { createApp } from 'vue';
import stash from '@leaflink/stash';

const app = createApp(App);

app.use(stash, {
  staticPath: '/my-assets-path',
});

Usually you will want to copy assets from the package installed in your node_modules folder to your application.

For projects using Vite, you can do it using the copy rollup plugin and adding to your plugins array:

pnpm add -D rollup-plugin-copy

import path from 'node:path';

import vue from '@vitejs/plugin-vue';
import copy from 'rollup-plugin-copy';
import { defineConfig, loadEnv } from 'vite';

export default defineConfig(({ mode }) => {
  const env = loadEnv(mode, process.cwd(), '');

  return {
    plugins: [
      vue(),
      copy({
        targets: [
          {
            src: path.resolve(__dirname, 'node_modules/@leaflink/stash/assets/spritesheet.svg'),
            dest: 'public/static',
          },
          {
            src: path.resolve(__dirname, 'node_modules/@leaflink/stash/assets/illustrations'),
            dest: 'public/static',
          },
        ],
        hook: 'buildStart',
      }),
    ],
  };
});

Illustrations and Icons

It's encouraged to use Stash's Illustration and Icon components for these kind of data.

1. If your work includes a new illustration, add it here in Stash: https://github.com/LeafLink/stash/tree/main/assets/illustrations
2. Import the component:

   import Illustration from '@leaflink/stash/Illustration.vue';
   import Icon from '@leaflink/stash/Icon.vue';

3. Use it in your template:

   <Illustration name="your-illustration-name" /> <Icon name="your-icon-name" />

4. Customize however you like: i.e:

   <Illustration name="your-illustration-name" :size="58" /> <Icon name="your-icon-name" :size="58" />

If you're working on existing templates that use SvgIcon using one of the newer illustrations and you feel inclined to migrate it over to Stash, that would be helpful!

Testing Icon's and Illustration's

The Icon and Illustration components from Stash now loads SVG's asyncronously. This is fine for tests unless you're actually looking to query for an SVG. In that event, you will just need to be sure to await findBy... the icon before asserting on or interacting with it.

Example

<!-- SomeComponent.vue -->
<Icon v-if="someCondition" data-test="delete-adjustment-icon" name="trashcan" />

// ❌ Fails
renderAccountingAmounts();
expect(screen.getByTestId('delete-adjustment-icon')).toBeInTheDocument();

// ❌ Possible false-positives
renderAccountingAmounts();
expect(screen.queryByTestId('delete-adjustment-icon')).not.toBeInTheDocument();

// ✅ Passes
renderAccountingAmounts();
expect(await screen.findByTestId('delete-adjustment-icon')).toBeInTheDocument();

// ✅ Passes
import { flushPromises } from '@vue/test-utils';

renderAccountingAmounts();
await flushPromises();
expect(screen.queryByTestId('delete-adjustment-icon')).not.toBeInTheDocument();

Details

• Slack thread: https://leaflink.slack.com/archives/C012WHER0R0/p1688063341166259
• Follow up Slack thread: https://leaflink.slack.com/archives/C012WHER0R0/p1688660541670479
• PR: https://github.com/LeafLink/stash/pull/1037

Contributing

Anyone can contribute to @leaflink/stash! Please check out the Contribution guide for guidelines about how to proceed.

Reach out in slack if you have other questions.

Architecture

If you are wanting to understand the how or why behind what is built, see the ARCHITECTURE.md doc.