.make-grid-columns() {
// Common styles for all sizes of grid columns, widths 1-12
.col(@index) { // initial
@item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
.col((@index + 1), @item);
}
.col(@index, @list) when (@index =< @grid-columns) { // general; "=<" isn"t a typo
@item: ~".col-xs-@{index}, .col-sm-@{index}, .col-md-@{index}, .col-lg-@{index}";
.col((@index + 1), ~"@{list}, @{item}");
}
.col(@index, @list) when (@index > @grid-columns) { // terminal
@{list} {
position: relative;
// Prevent columns from collapsing when empty
min-height: 1px;
// Inner gutter via padding
padding-left: ceil((@grid-gutter-width / 2));
padding-right: floor((@grid-gutter-width / 2));
}
}
.col(1); // kickstart it
}this code is to add a common style to all grids and to replace the loop
by recursion. Why should the item variable in this be added to avoid compilation?
does not compile css and does not have the function to put the value of index into it
