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It is useful when you want to define a mixin that abstracts out either wrapping a piece of code inside a media query or a non-supported browser class identify. The rulesets is usually handed to mixin so which the mixin can wrap the information, e.g.

If you would like Check out if a value is in a selected unit in addition to staying a amount, you may use considered one of:

Be aware that & represents all dad or mum selectors (not just the nearest ancestor) so the next case in point:

The one exception are prices in attribute selector, less is aware they've got precisely the same that means and matches them.

If precisely what is returned from the lookup is another detached ruleset, You should utilize a second lookup to receive that value.

Functions extra by a @plugin at-rule adheres to Less scoping procedures. This can be perfect for Less library authors that choose to add performance devoid of introducing naming conflicts.

When defining a variable two times, the last definition of your variable is utilised, browsing from the current scope upwards. This is comparable to css itself where by the final home inside of a definition is utilised to determine the worth.

A mixin reference can offer parameters values by their names instead of just positions. Any parameter could be referenced by its title and they don't ought to be in any Particular buy:

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Essentially, Every single scope contains a "closing" value, much like Attributes within the browser, like this example working with custom Homes:

Mixins is usually assigned to your variable being named being a variable get in touch with, or can be utilized for map lookup.

& may possibly seem more than at the time in just a selector. This makes it probable to regularly consult with a mother or father selector without the need of repeating its identify.

Variables make your code 4 Less a lot easier to take care of by providing you with a means to control These values from a single location:

Discover that with no &, the above mentioned example would end in a :hover rule (a descendant selector that matches hovered elements within tags) and this is simply not what we typically would want Together with the nested :hover.