LESS
Functions Overview
Mixins - classes for classes
Parametric mixins - classes to which you can pass parameters, like functions
Nested Rules - classes with classes, which cut down on repetitive code
Operations - math within CSS
Color functions - edit your colors
Namespaces - group of styles that can be called by references
Scopes - make local changes to styles
JavaScript evaluations - JS expressions evaluated in CSS
You can play online [HERE]
Variables
Extend
Extend is a LESS pseudo-class which merges the selector it is put on with ones that match what it references.
LESS Output CSS
Mixins
LESS Output CSS
Nested Rules
Plain CSS LESS
Not Outputting the Mixin
LESS Output CSS
Selectors in Mixins
LESS Output CSS
Namespaces
Guarded Namespaces
Parametric Mixins
Mixin Usage
Mixins with Multiple Parameters
Mixins with Multiple Parameters
Compiles To
Named parameters
A mixin reference can supply parameters values by their names instead of just positions.
@rest Variable
You can use ... if you want your mixin to take a variable number of arguments. Using this after a variable name will assign those arguments to the variable.
Pattern-matching
Define Mixin Usage
Mixins as Functions
Passing Rulesets to Mixins
A detached ruleset is a group of properties, nested rulesets, media declarations or anything else stored in a variable.
Detached Ruleset
A detached ruleset call unlocks(returns) all its mixins into caller the same way as mixins calls do. However, it does NOT return variables.
Scoping
Definition and Caller Scope Visibility
A detached ruleset sees the caller's variables and mixins:
Scoping
Definition and Caller Scope Visibility
Variables and mixins accessible from definition win over those available in the caller:
Referencing Won't Modify Detached Ruleset Scope
Unlocking Will Modify Detached Ruleset Scope
Parent Selectors
The & operator represents the parent selector of a nested rule.
LESS Output CSS
Notice that without the &, the above example would result in a :hover rule
Loops
A generic example of using a recursive loop to generate CSS grid classes
LESS Output CSS
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By acierto
LESS
Introduction to LESS
