BEM, acronym for Block, Element, Modifier, is a methodology for writing reusable and modular CSS classes in web development. It offers a structured approach to organize and style HTML components efficiently.
The "Block" in BEM refers to a stand-alone, self-contained component that is designed to be reusable. It represents the main container or context of the element. Blocks are typically named using a descriptive and unique class name.
The "Element" is a part of the block, a smaller component that cannot be used outside of its parent block. Elements are named by appending a double underscore (__) to the block name, followed by the element name. They are responsible for specific functionalities or styles within the block's context.
The "Modifier" allows us to customize or modify the appearance or behavior of a block or element. Modifiers are indicated by appending a double dash (--) to the block or element name, followed by the modifier name. They enable variations, states, or alternative styles to be applied to the base block or element.
BEM aims to provide a clear and understandable naming structure for CSS classes, making the code more maintainable and scalable. Its methodology promotes reusability and separation of concerns, ensuring that CSS styles do not unnecessarily overlap or interfere with each other. BEM has gained popularity due to its ability to create modular and robust codebases, easing the development and maintenance of complex UI components.
