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How can I effectively organize my CSS using BEM for better scalability and maintenance?

Asked on Dec 19, 2025

Answer

BEM (Block Element Modifier) is a methodology that helps you organize your CSS for better scalability and maintenance by using a structured naming convention. It breaks down your UI into independent blocks, elements, and modifiers.

Example Concept: BEM stands for Block, Element, Modifier. A "Block" is a standalone entity that is meaningful on its own, such as a button or a menu. An "Element" is a part of a block that has no standalone meaning and is semantically tied to its block, like a button's icon. A "Modifier" is a flag on a block or element that changes its appearance or behavior, like a button's color or size. The naming convention uses double underscores for elements (e.g., .block__element) and double hyphens for modifiers (e.g., .block--modifier).

Additional Comment:
  • Use BEM to create clear, predictable class names that reflect the structure and purpose of your components.
  • Blocks should be reusable and not depend on other blocks, enhancing modularity.
  • Elements are always tied to their parent block, ensuring a clear hierarchy.
  • Modifiers allow for easy customization and variation without altering the base block or element.
  • Consistent naming helps in understanding and maintaining the CSS, especially in large projects.
✅ Answered with CSS best practices.

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