I like the ease of creating a responsive and semantic website. I especially like how it allows me to control the amount of nesting of HTML elements, without the need for any extra markup. I dislike that Less compiles to CSS, not to JS. It is a little confusing at first, but I think once you get used to it, it is very powerful and easy to use. It's very powerful, and I haven't found anything I dislike. It's good for creating responsive websites. The code size reduction, faster rendering time, ability to write clean and scalable CSS. Sometimes you need to use Javascript for animation or other things that are not supported by less (e.g. @keyframes). I recommend using this tool when working with CSS. It's fast, has good syntax support and comes with a lot of tools like minification, LESS compiling etc. I used it for frontend development in my projects.
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