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@viamrobotics/prime-core

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@viamrobotics/prime-core

## Getting started

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Version published
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6
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Source

@viamrobotics/prime-core

Getting started

@viamrobotics/prime-core is a collection of core Svelte components.

Installation

Add PRIME core using your package manager of choice:

pnpm add --save-dev @viamrobotics/prime-core

Install Tailwind. In the tailwind.config.js, add the components to the content and include the theme:

import { theme } from '@viamrobotics/prime-core/theme';

/** @type {import('tailwindcss').Config} */
export default {
  content: [
    './src/**/*.{html,js,svelte,ts}',
    './node_modules/@viamrobotics/prime-core/**/*.{ts,svelte}',
  ],
  theme,
  plugins: [],
};

Import the stylesheet. If you are using SvelteKit, you can do this in src/routes/+layout.svelte.

import '@viamrobotics/prime-core/prime.css';

You can now use the components in your app:

<script lang="ts">
  import { Badge } from '@viamrobotics/prime-core';
</script>

<Badge
  variant="green"
  label="Active"
/>

Playground

The playground can be used during development but is not used outside of the package.

pnpm install
pnpm -C packages/core dev

Linting

To lint and typecheck:

pnpm -C packages/core check        # check svelte and lint
pnpm -C packages/core check-svelte # check svelte only
pnpm -C packages/core check-lint   # check lint only with prettier and eslint
pnpm -C packages/core format       # format with prettier

Testing

To test with vitest:

pnpm -C packages/core test        # run once
pnpm -C packages/core test:watch  # watch tests

Anatomy of a Component

For easier readability, we try to use a standard ordering for component composition. These are not strict rules, but more a guideline to follow. Implementation specifics may force you to go outside this guideline.

<!-- svelte options: https://svelte.dev/docs/special-elements#svelte-options -->
<svelte:options immutable />

<script
  lang="ts"
  context="module"
>
  // exported types
  export type MyType = 'thing' | 'other-thing';
</script>

<script lang="ts">
  // external imports
  import { onMount, createEventDispatcher } from 'svelte';

  // internal imports
  import { someLibraryFunction } from '$lib';
  import { someSiblingFunction } from './sibling';

  // prop declarations
  /** A doc string for prop explaining what it does. */
  export let prop: MyType | undefined = undefined;

  // event dispatchers and other hooks
  const dispatcher = createEventDispatcher<{
    /** A doc string for the event handler. */
    click: null; // void event
    /** A doc string for the event handler. */
    primitive: string | number | boolean; // simple primitive values
    /** A doc string for the event handler. */
    object: { id: string; next: number; }; // complex values
    /** A doc string for the event handler. */
    native: Event // native events (for pure atoms)
  }>()

  // internal fields
  let someString = '';

  // reactive variables
  $: isThing = prop === 'thing';

  // complex reactive variables
  let counter = 0;
  $: if (isThing) {
      counter = someString.length;
      if (counter > 10) {
        counter = 10;
      }
  }

  // single-line functions
  const doSomething = () => someLibraryFunction();

  // multi-line functions
  const doSomethingElse = () => {
    const shouldDoSomething = someString !== '';
    someSiblingFunction(shouldDoSomething);
  }

  // reactive statements
  $: {
    someString = prop ? 'whoa' : 'no';
  }

  // lifecycle hooks
  onMount(() => ...);
</script>

<!-- Your layout -->
<div class="border-black">
  <!-- 
    all slots should be named if there are multiple; otherwise a single slot 
    can be the default `<slot />`  
  -->
  <slot name="title" />
  <slot name="content" />
</div>

<style>
  /* custom styles */
</style>

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Package last updated on 13 Oct 2023

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