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parcel-transformer-lit-sass's Introduction

parcel-transformer-lit-sass

Import a SCSS file into a Lit component as a CSS template literal.

This Parcel setup will take a SASS file import, compile it to CSS, then convert it to a Lit CSS template literal:

Setup

Install the package from npm

npm i parcel-transformer-lit-sass

In your .parcelrc config file, create a named pipeline which will tell Parcel to use the three transformers shown below, in that order.

Your config may look something like this:

{
  "extends": "@parcel/config-default",
  "transformers": {
    "litsass:*": [
      "@parcel/transformer-sass",
      "parcel-transformer-lit-sass",
      "@parcel/transformer-js"
    ]
  }
}

You can change 'litsass' to a different name if you desire.

If you are importing a .css file, remove @parcel/transformer-sass

How to use

Prepend your import path with your named pipeline:

import myStyles from 'litsass:./myStyles.scss'

The value of myStyles will become:

mySyles = css`
  p {
    color: black;
  }
  ...
`

Example

import { html, LitElement } from 'lit';
import { customElement } from 'lit/decorators';

// Import stylesheet using the 'litsass:' named pipeline
import myStyles from 'litsass:./myStyles.scss';

@customElement('my-component')
export class MyComponent extends LitElement {

	static styles = [myStyles];

	...

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