package:sass_builder transpiles Sass files using the build package and
the Dart implementation of Sass.
1. Add build_runner and sass_builder as dev dependencies
in your pubspec.yaml file:
dart pub add dev:build_runner dev:sass_builderIf you want to use any packages that provide source sass files,
add them as normal pub dependencies.
For example, if you want to use styles from package:bootstrap_sass:
dart pub add bootstrap_sass2. Create web/main.scss containing the following code:
@use "sub";
@use "package:bootstrap_sass/scss/variables" as bootstrap;
.a {
color: blue;
}
.c {
color: bootstrap.$body-color;
}3. Create web/_sub.scss containing the following code:
.b {
color: red;
}4. Create web/index.html containing the following code:
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Sample</title>
<link rel="stylesheet" href="main.css">
</head>
<body>
<div class="a">Some Text</div>
<div class="b">Some Text</div>
<div class="c">Some Text</div>
</body>
</html>5. Run dart run build_runner serve and then go to localhost:8080 with a browser
and check if the file web/main.css was generated containing:
.b {
color: red;
}
.a {
color: blue;
}
.c {
color: #373a3c;
}To configure options for the builder see the build_config
README.
outputStyle: Supportsexpandedorcompressed. Defaults toexpandedin dev mode, andcompressedin release mode.sourceMaps: Whether to emit source maps for compiled CSS. Defaults totruein development mode and tofalsein release mode.
Example that compresses output in dev mode:
targets:
$default:
builders:
sass_builder:
options:
outputStyle: compressed