css - How to ignore passing parameter in mixin -


i want use less mixin borders in project, need use different sides of border, not all.

i have written simple mixin:

.border-all (@border; @border-type; @border-color) {   border-top: @border @border-type @border-color;   border-right: @border @border-type @border-color;   border-bottom: @border @border-type @border-color;   border-left: @border @border-type @border-color; }

is possible example pass arguments border-top , border-bottom ?

so: 

.class {   .border-all (3px; double; @border-color); }

would output in:

.class {   border-top: 3px double #333;   border-bottom: 3px double #333; }

can ignore passing parameters different css properties in mixin?

first of ask why need mixin @ all. how better border: 3px double @border-color;?

same way instead of making quite bloating , confusing conditional logic mixin rather stick temporary variable, e.g.:

.class {    @border: 3px double @border-color;     border-top: @border;     border-bottom: @border; }

yep, it's 3 lines of code instead of 1 it's no doubt more easy maintain.

---

either way if had use such mixin i'd simplify like:

// usage:  .c1 {     .border(top right, 1px solid black); }  .c2 {     .border(1px solid black); }  // impl:  .border(@sides, @value) {     .side(length(@sides));     .side(@i) when (@i > 0) {         @side: extract(@sides, @i);         border-@{side}: @value;         .side(@i - 1);     } }  .border(@value) {     border: @value; }

as can't see point in using redundant commas and/or semicolons in case.


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