As an extension to CSS, Less is not only backwards compatible with CSS, but the extra features it adds use existing CSS syntax. This makes learning Less a breeze, and if in doubt, lets you fall back to vanilla CSS.
Note that variables are actually constants in that they can only be defined once.
Mixins are a way of including ( mixing in ) a bunch of properties from one rule-set into another rule-set. So say we have the following class:
And we want to use these properties inside other rule-sets. Well, we just have to drop in the name of the class where we want the properties, like so:
The properties of the .bordered class will now appear in both #menu a and .post a. (Note that you can also use #ids as mixins.)
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