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dart-sass

Provides comprehensive guidance for Dart Sass including Sass syntax, compilation, mixins, functions, and best practices. Use when the user asks about Dart Sass, needs to compile Sass to CSS, use Sass features, or work with Sass in projects.

When to use this skill

Use this skill whenever the user wants to:

  • Install and configure Dart Sass
  • Compile Sass/SCSS files to CSS
  • Use Sass syntax features (variables, nesting, mixins, functions, etc.)
  • Work with Sass modules and imports
  • Integrate Sass into build tools or workflows
  • Use Sass CLI commands
  • Configure Sass compilation options
  • Use Sass in JavaScript or Dart projects
  • Optimize Sass compilation performance
  • Handle Sass source maps

How to use this skill

To use Dart Sass:

  1. Install Dart Sass:

    • Load examples/getting-started/installation.md for installation instructions
    • Load examples/getting-started/basic-usage.md for basic usage examples
    • Load examples/getting-started/compiling-modes.md for different compilation modes
  2. Learn Sass syntax:

    • Load examples/syntax/variables.md for variable usage
    • Load examples/syntax/nesting.md for nesting syntax
    • Load examples/syntax/mixins.md for mixins
    • Load examples/syntax/functions.md for functions
    • Load examples/syntax/operators.md for operators
    • Load examples/syntax/at-rules.md for at-rules
  3. Use advanced features:

    • Load examples/features/modules.md for module system
    • Load examples/features/imports.md for imports
    • Load examples/features/control-flow.md for control flow
    • Load examples/features/built-in-modules.md for built-in modules
    • Load examples/features/source-maps.md for source maps
    • Load examples/features/custom-functions.md for custom functions
  4. Reference the API documentation when needed:

    • api/js-api.md - JavaScript API reference
    • api/dart-api.md - Dart API reference
    • api/cli-api.md - CLI command reference
  5. Use templates for quick start:

    • templates/basic-project.md - Basic Sass project template
    • templates/modular-project.md - Modular Sass project template
    • templates/build-integration.md - Build tool integration template

Doc mapping (one-to-one with official documentation)

  • examples/ → https://sass-lang.com/documentation/

Examples and Templates

This skill includes detailed examples organized to match the official documentation structure. All examples are in the examples/ directory (see mapping above).

To use examples:

  • Identify the topic from the user's request
  • Load the appropriate example file from the mapping above
  • Follow the instructions, syntax, and best practices in that file
  • Adapt the code examples to your specific use case

To use templates:

  • Reference templates in templates/ directory for common scaffolding
  • Adapt templates to your specific needs and coding style

API Reference

  • JavaScript API: api/js-api.md - JavaScript API for compiling Sass (compile, compileString, etc.)
  • Dart API: api/dart-api.md - Dart API for compiling Sass
  • CLI API: api/cli-api.md - Command-line interface options and usage

Best Practices

  1. Use @use instead of @import: The @import rule is deprecated, use @use and @forward instead
  2. Organize with modules: Use the module system to organize and share code
  3. Optimize compilation: Use appropriate output style (compressed for production)
  4. Source maps: Enable source maps for development, disable for production
  5. Watch mode: Use --watch for development to automatically recompile on changes
  6. Load paths: Use --load-path to simplify import paths
  7. Performance: Use Dart Sass for best performance (faster than Ruby Sass)
  8. Version control: Don't commit compiled CSS files, only commit Sass source files

Resources

  • Official Website: https://sass-lang.com/dart-sass/
  • Installation Guide: https://sass-lang.com/install/
  • Documentation: https://sass-lang.com/documentation/
  • GitHub Repository: https://github.com/sass/dart-sass
  • npm Package: https://www.npmjs.com/package/sass
  • pub.dev Package: https://pub.dev/packages/sass

Keywords

dart-sass, sass, scss, css preprocessor, sass compiler, sass syntax, sass modules, sass mixins, sass functions, sass variables, sass nesting, @use, @forward, @import, @include, @mixin, @function, sass:math, sass:color, sass:string, source maps, sass cli, sass api, 样式预处理器, Sass 编译器, Sass 语法, Sass 模块, Sass 混合, Sass 函数

能力边界

✅ 适用场景

  • 当你需要使用此技能对应的技术栈时
  • 当项目需要遵循最佳实践时
  • 当需要快速上手或深入理解核心概念时

⚠️ 需要注意

  • 复杂业务逻辑需要结合具体场景调整
  • 性能优化需要根据实际数据量评估

❌ 不适用场景

  • 不相关的技术栈或框架
  • 需要完全自定义的特殊场景

常见陷阱 (Gotchas)

  1. 版本兼容性:注意框架版本与依赖库的兼容性,不同版本 API 可能有差异
  2. 配置文件格式:配置文件格式错误是最常见的问题,建议使用编辑器的语法检查
  3. 环境变量:确保所有必要的环境变量已正确设置,敏感信息不要硬编码
  4. 依赖冲突:多版本共存时注意依赖冲突,使用 lock 文件锁定版本
  5. 性能陷阱:大数据量场景下注意性能优化,避免 N+1 查询等常见问题

使用流程

Step 1: 环境准备

确保开发环境已安装必要的依赖和工具。

Step 2: 配置初始化

根据项目需求进行基础配置。

Step 3: 核心功能使用

按照示例代码实现核心功能。

Step 4: 测试验证

运行测试确保功能正常。

Step 5: 部署上线

完成开发后进行部署和监控。