What are the advantages of the BEM methodology?

BEM (Block, Element, Modifier) – a methodology for naming CSS classes based on dividing the interface into independent blocks.

Advantages:

• Modularity: Allows creating interface components that can be reused independently.
• Maintainability: Thanks to a clear naming structure, it is easier to find and modify styles without affecting other parts of the project.
• Scalability: Suitable for large projects with many developers, as it reduces the risk of class name conflicts.
• Clarity: Class names reflect the structure and purpose of elements, improving code readability.
• Predictability: Block styles do not depend on the context, which eliminates unexpected behavior.
• Isolation: Styles of one block do not affect styles of another.

Example:

/* Block button */
.button {
  display: inline-block;
  padding: 10px 20px;
  border: 1px solid blue;
}

/* Element icon inside the button block */
.button__icon {
  margin-right: 5px;
}

/* Modifier primary for the button block */
.button--primary {
  background-color: blue;
  color: white;
}

/* Modifier disabled for the button block */
.button--disabled {
  opacity: 0.5;
  cursor: not-allowed;
}