Utility API
Bootstrap\'s Utility API uses Sass configuration to generate reusable utility classes and can extend the framework\'s standard utility vocabulary.
Core concept
Explain utility configuration, property/value generation, responsive behavior, and why a custom utility is useful when the same styling decision appears repeatedly.
Using it in a real interface
Create a custom utility for a project-specific maximum width or text treatment and explain how the build process generates its class.
Implementation notes
Do not create a utility for every one-off design. A utility is valuable when a rule is reusable, predictable, and likely to appear across multiple pages.
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