Bootstrap – Snippets

Bootstrap 4 dropdown hover

CSS

.dropdown:hover>.dropdown-menu {
    display: block;
}

JavaScript

function toggleDropdown (e) {
  const _d = $(e.target).closest('.dropdown'),
    _m = $('.dropdown-menu', _d);
  setTimeout(function(){
    const shouldOpen = e.type !== 'click' && _d.is(':hover');
    _m.toggleClass('show', shouldOpen);
    _d.toggleClass('show', shouldOpen);
    $('[data-toggle="dropdown"]', _d).attr('aria-expanded', shouldOpen);
}, e.type === 'mouseleave' ? 150 : 0);
}

$('body')
  .on('mouseenter mouseleave','.dropdown',toggleDropdown)
  .on('click', '.dropdown-menu a', toggleDropdown);

Container fluid left right

SCSS

@mixin make-container-fluid-left-right($gutter: $grid-gutter-width) {
    width: 100%;
    padding-right: $gutter / 2;
    padding-left: $gutter / 2;
}
@mixin make-container-fluid-left($max-widths: $container-max-widths, $breakpoints: $grid-breakpoints) {
    @each $breakpoint, $container-max-width in $max-widths {
        @include media-breakpoint-up($breakpoint, $breakpoints) {
            margin-right: calc((100% - #{$container-max-width}) / 2);
            width: calc(100% - ((100% - #{$container-max-width}) / 2));
        }
    }
}
@mixin make-container-fluid-right($max-widths: $container-max-widths, $breakpoints: $grid-breakpoints) {
    @each $breakpoint, $container-max-width in $max-widths {
        @include media-breakpoint-up($breakpoint, $breakpoints) {
            margin-left: calc((100% - #{$container-max-width}) / 2);
            width: calc(100% - ((100% - #{$container-max-width}) / 2));
        }
    }
}
.container-fluid-left {
    @include make-container-fluid-left-right();
    @include make-container-fluid-left();
}
.container-fluid-right {
    @include make-container-fluid-left-right();
    @include make-container-fluid-right();
}

Responsive column margin

SCSS

.col-item {
    margin-bottom: $grid-gutter-width;
}
.col-item-sm {
    margin-bottom: $grid-gutter-width;
    @include media-breakpoint-up(sm) {
        margin-bottom: 0;
    }
}
.col-item-md {
    margin-bottom: $grid-gutter-width;
    @include media-breakpoint-up(md) {
        margin-bottom: 0;
    }
}
.col-item-lg {
    margin-bottom: $grid-gutter-width;
    @include media-breakpoint-up(lg) {
        margin-bottom: 0;
    }
}
.col-item-xl {
    margin-bottom: $grid-gutter-width;
    @include media-breakpoint-up(xl) {
        margin-bottom: 0;
    }
}
[class^='col-item'], [class*=" col-item"] {
    &:last-child {
        margin-bottom: 0;
    }
}