Less VS BEM

Compare Less VS BEM and see what are their differences

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Less

Less extends CSS with dynamic behavior such as variables, mixins, operations and functions. Less runs on both the server-side (with Node. js and Rhino) or client-side (modern browsers only).

BEM

BEM — Block Element Modifier is a methodology, that helps you to achieve reusable components and code sharing in the front-end.

Landing page //
2021-09-19

Landing page //
2022-11-21

Less features and specs

Simplifies CSS
Less extends CSS with dynamic behavior like variables, mixins, operations, and functions, making stylesheets more maintainable and less repetitive.
Preprocessing
Allows developers to write easier and cleaner code which then gets compiled into standard CSS, facilitating better performance and compatibility.
Variables and Mixins
With the ability to use variables and mixins, code becomes modular and reusable, reducing the potential for errors and simplifying updates.
Nested Syntax
Supports nested syntax which allows CSS to be structured in a manner that follows the same visual hierarchy, making it easier to read and understand.
Compatibility
Compatible with all versions of CSS, making it easier to integrate with existing projects and frameworks without breaking them.

Possible disadvantages of Less

Learning Curve
Requires developers to learn new syntax and concepts, which can be a barrier for those who are accustomed to traditional CSS.
Compilation Requirement
Code written in Less needs to be compiled to CSS, adding an extra step in the development process.
Performance Overhead
While not significant, the preprocessing step can add to development time and require additional configuration and tools.
Debugging
Debugging Less can be more challenging compared to plain CSS because source maps need to be set up properly to map the compiled CSS back to the Less files.
Dependency
Relies on Node.js or another JavaScript runtime for compiling the Less code, adding another dependency to the project.

BEM features and specs

Consistency
BEM enforces a structured way of naming and organizing CSS classes, which promotes consistency across the codebase.
Scalability
The methodology is designed to handle large and complex projects by keeping styles modular and reusable, which helps in maintaining scalability.
Maintainability
By using a clear naming convention, BEM makes it easier for developers to understand and maintain code, even if they weren't the original authors.
Flexibility
BEM allows for flexible and modular component development, making modifications easier without affecting unrelated parts of the codebase.

Possible disadvantages of BEM

Verbose Naming
The class names in BEM can become quite long and verbose, which might make the HTML markup harder to read.
Learning Curve
Developers unfamiliar with BEM may need some time to adapt to its conventions and understand the methodology well.
No Enforced Hierarchy
BEM does not inherently enforce any specific hierarchy or structure among elements, which might lead to inconsistencies if not carefully managed.
Increased Initial Setup
Implementing BEM from scratch can involve significant upfront planning and setup, which might be seen as an overhead for smaller projects.

Analysis of Less

Overall verdict

Yes, Less is considered a good tool for developers looking to enhance their CSS with additional features that improve code organization and reusability. It's particularly praised for its simplicity and ease of use, making it a solid choice for both new and experienced developers.

Why this product is good

Less is a CSS pre-processor that allows for more efficient and manageable styling of web projects. It extends the capabilities of CSS with variables, nested rules, mixins, and functions, making it easier to maintain and scale large stylesheets. Developers can write more concise code, which is then compiled into standard CSS. This makes Less particularly useful for projects that require complex styling structures.

Recommended for

Web developers who want more control over their CSS.
Projects with large or complex CSS codebases.
Teams looking to implement consistent styling patterns.
Developers familiar with or transitioning from pure CSS looking for additional functionality.

Less videos

+ Add

'Less' author Andrew Sean Greer answers your questions

BEM videos

+ Add

BEM REVIEW! is Bem worth watching?

Category Popularity

0-100% (relative to Less and BEM)

BEM

Design Tools

32 32%

Design Tools

68% 68

Developer Tools

0 0%

Developer Tools

100% 100

Health And Fitness

100 100%

Health And Fitness

0% 0

Productivity

100 100%

Productivity

0% 0

User comments

Share your experience with using Less and BEM. For example, how are they different and which one is better?

Social recommendations and mentions

Based on our record, BEM seems to be more popular. It has been mentiond 49 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Less mentions (0)

We have not tracked any mentions of Less yet. Tracking of Less recommendations started around Mar 2021.

BEM mentions (49)

Why CSS Is So Hard for Generative AIs to Understand?
Beyond the countless ways to achieve the same result, there are just as many methodologies for writing CSS itself. Have you ever came across BEM, SMACSS, OOCSS, atomic CSS, etc. If not, then you can add yours to the list. - Source: dev.to / 9 months ago
hearing Michael Scott.
SCSS makes it easier to use mixing and variables. I'm exploring it's applications for Codepen as well as the use of BEM to modularize reusable CSS components. - Source: dev.to / about 1 year ago
The CSS Odyssey: Why I Turned back to CSS After Trying Everything Else
Style conflicts is one. Although CSS class definitions are placed in reverse import order, problems still occur in Next.js when some pieces only appear in page but not layout CSS bundles. Following BEM (Block Element Modifier) and "Composition over Extension" patterns to separate concerns helps avoid styling collisions significantly. - Source: dev.to / about 1 year ago
:where() :is() my mind?
BEM encourages a flat structure with minimal nesting and specificity, making styles easier to read and maintain. It significantly reduces the risk of unintended style overrides and enhances modularity. - Source: dev.to / about 2 years ago
SASS, CSS, or Tailwind: Which One Should You Choose?
Keep in mind you also have to use BEM. If you use just SASS, there are little to no advantages compared with CSS. I am going to cover BEM in a separate article, but for your understanding, BEM is a methodology for writing good CSS. - Source: dev.to / over 2 years ago

What are some alternatives?

When comparing Less and BEM, you can also consider the following products

PostCSS - Increase code readability. Add vendor prefixes to CSS rules using values from Can I Use. Autoprefixer will use the data based on current browser popularity and property support to apply prefixes for you.

Sass - Syntatically Awesome Style Sheets

styled-components - styled-components is a visual primitive for the component age that also helps the user to use the ES6 and CSS to style apps.

Stylus - EXPRESSIVE, DYNAMIC, ROBUST CSS

Tailwind CSS - A utility-first CSS framework for rapidly building custom user interfaces.

CSS Next - Use tomorrow’s CSS syntax, today.

styled-components vs Less

styled-components vs BEM

Stylus vs Less