compile-sass

A module to compile SASS on-the-fly and/or save it to CSS files using dart-sass for Node.js

The goal of this project is twofold:

1. To provide a library that can compile SASS files on page load when using NODE_ENV=development in order to reduce development time (on-the-fly)
2. To enable compilation and saving of SASS files to CSS files on all other environments when, for example, the application starts or with an npm script

Important Note:

This is the documentation for v2. If you need the documentation for v1, please see the Readme from the last release of v1: https://github.com/eiskalteschatten/compile-sass/tree/v1.1.3

Table of Contents

• Requirements
• Install
• Example Usage
• Usage
• API
• Migration Guide
• Release Notes
• Maintainer

Requirements

This module is tested with Node.js >= 14. It might work with Node.js <= 13, but is not tested.

Peer Dependencies:

• sass
• express

Install

npm install --save compile-sass sass express

Example Usage

The following are a couple of examples of how you can use it in a real-life application:

Note: These examples still use v1. This notice will be removed once they have been updated.

• Setup: Node.js / TypeScript
• Configuration: Node.js / TypeScript
• Integration into the app: Node.js / TypeScript

Usage

For on-the-fly compiling

TypeScript

import compileSass from 'compile-sass';
app.use('/css/:cssName', compileSass());

CommonJS

Pay attention to the compileSass.setup which differs from the TypeScript variation!

const compileSass = require('compile-sass');
app.use('/css/:cssName', compileSass.setup());

With options

TypeScript

import compileSass from 'compile-sass';

app.use('/css/:cssName', compileSass({
  sassFilePath: path.join(__dirname, 'public/scss/'),
  sassFileExt: 'sass',
  embedSrcMapInProd: true,
  resolveTildes: true,
  sassOptions: {
    alertAscii: true,
    verbose: true
  }
}));

CommonJS

Pay attention to the compileSass.setup which differs from the TypeScript variation!

const compileSass = require('compile-sass');

app.use('/css/:cssName', compileSass.setup({
  sassFilePath: path.join(__dirname, 'public/scss/'),
  sassFileExt: 'sass',
  embedSrcMapInProd: true,
  resolveTildes: true,
  sassOptions: {
    alertAscii: true,
    verbose: true
  }
}));

Options

• sassFilePath (default: 'public/scss')
• sassFileExt (default: 'scss')
• embedSrcMapInProd (default: false)
• resolveTildes (default: false)
• sassOptions (default: {})
  • See https://sass-lang.com/documentation/js-api/interfaces/Options for more details

For compiling and saving as static CSS files

import { compileSassAndSaveMultiple } from 'compile-sass'; // TypeScript
const { compileSassAndSaveMultiple } = require('compile-sass'); // CommonJS

await compileSassAndSaveMultiple({
    sassPath: path.join(__dirname, 'public/scss/'),
    cssPath: path.join(__dirname, 'public/css/'),
    files: ['libs.scss']
  });
}));

API

compileSass()

Returns the compiled SASS as a string.

import { compileSass } from 'compile-sass'; // TypeScript
const { compileSass } = require('compile-sass'); // CommonJS

const cssString = await compileSass();

compileSassAndSave()

Compiles the given SASS file and saves it in the given directory.

import { compileSassAndSave } from 'compile-sass'; // TypeScript
const { compileSassAndSave } = require('compile-sass'); // CommonJS

await compileSassAndSave('full/path/to/sass-file.scss', 'full/path/to/css/');

compileSassAndSaveMultiple()

Compiles multiple SASS files defined in the "files" option. They must all be located in the directory defined in the "sassPath" option. The CSS files will be saved in the directory defined in the "cssPath" option.

import { compileSassAndSaveMultiple } from 'compile-sass'; // TypeScript
const { compileSassAndSaveMultiple } = require('compile-sass'); // CommonJS

await compileSassAndSaveMultiple({
    sassPath: path.join(__dirname, 'public/scss/'),
    cssPath: path.join(__dirname, 'public/css/'),
    files: ['libs.scss']
  });
});

setupCleanupOnExit()

Deletes the passed directory when the app is exited. The idea is to pass the directory where your compiled CSS files are, so that they can be deleted when the app is exited and recompiled when the app starts.

import { setupCleanupOnExit } from 'compile-sass'; // TypeScript
const { setupCleanupOnExit } = require('compile-sass'); // CommonJS

process.on('SIGINT', () => {
  try {
    setupCleanupOnExit('full/path/to/css');
    process.exit(0);
  }
  catch(error) {
    process.exit(1);
  }
});

Migration Guide

v1 to v2

The update to v2 includes a couple of breaking changes to be aware of:

• express and sass are now peer dependencies that need to be installed seperately. compile-sass will not work without them.
• The nodeSassOptions parameter in the setup is now called sassOptions because the new sass compiler uses a different set of options than its predecessor. See https://sass-lang.com/documentation/js-api/interfaces/Options for the options supported by the new compiler.
• compile-sass now requires Node >= 14

Release Notes

2.0.0

• Move away from the deprecated node-sass package in lieu of the Dart-based sass package
  • Warning: Breaking change! nodeSassOptions is now sassOptions with different parameters. Check the documentation above.
  • The sass package is now a peer dependency and needs to be managed by the installing project
• Update all npm packages
• Remove express as a direct dependency since it's a peer dependency and should be managed by the installing project
• Remove packages that can be replaced with functionality from Node's standard library
• Support for Node >= 16
• Use bootstrap to improve testing by compiling real world examples
• Add more asynchronous behavior to boost performance
• Security updates

1.1.3

• Security updates
• Update TypeScript

1.1.2

• Security updates

1.1.1

• Security updates

1.1.0

• Add a feature to resolve paths passed to @import that start with ~
• Security updates
• Fix a bug where the node-sass options passed during setup weren't always used

1.0.5

• Fix a critical security vulnerability

1.0.4

• Security updates
• Update node-sass
• Update hoek 5 to @hapi/hoek 9

1.0.3

• Fix the broken 1.0.2 release

1.0.2

• Security updates
• Update node-sass

1.0.1

• Optimize what is included when the package is published (no more test files!)
• Fix a couple of broken links in the Readme
• Include LICENSE

1.0.0

• Complete re-write with TypeScript
• Include typings for TypeScript
• Include automated testing for better stability

0.1.4

• Update dependencies to fix security vulnerabilities

0.1.3

• Fix security vulnerabilities

0.1.2

• Update node-sass

0.1.1

• Add more documentation

0.1.0

• Add the ability to pass options to node-sass
• Add further documentation

Maintainer

This modules is maintained by Alex Seifert (Website, Github).