Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class="foo">Hello</div>

<div class="bar">Hello</div>

SassMeister-input.scss

// ----
// Sass (vundefined)
// Compass (vundefined)
// dart-sass (v1.18.0)
// ----

$breakpoint-grid-xs: 0;
$breakpoint-grid-sm: 480px;
$breakpoint-grid-md: 730px;
$breakpoint-grid-lg: 1024px;
$breakpoint-grid-xl: 1250px;

$grid-breakpoints: (
  // Extra small screen / phone
  xs: $breakpoint-grid-xs,
  // Small screen / phone
  sm: $breakpoint-grid-sm,
  // Medium screen / tablet
  md: $breakpoint-grid-md,
  // Large screen / desktop
  lg: $breakpoint-grid-lg,
  // Extra large screen / wide desktop
  xl: $breakpoint-grid-xl
);

$displays: none, inline, inline-block, block, table, table-row, table-cell, flex, inline-flex !default;

@function breakpoint-infix($name, $breakpoints: $grid-breakpoints) {
  @return if(breakpoint-min($name, $breakpoints) == null, "", "-#{$name}");
}

@function breakpoint-min($name, $breakpoints: $grid-breakpoints) {
  $min: map-get($breakpoints, $name);
  @return if($min != 0, $min, null);
}

// Media of at least the minimum breakpoint width. No query for the smallest breakpoint.
// Makes the @content apply to the given breakpoint and wider.
@mixin media-breakpoint-up($name, $breakpoints: $grid-breakpoints) {
  $min: breakpoint-min($name, $breakpoints);
  @if $min {
    @media (min-width: $min) {
      @content;
    }
  } @else {
    @content;
  }
}

@each $breakpoint in map-keys($grid-breakpoints) {
  @include media-breakpoint-up($breakpoint) {
    $infix: breakpoint-infix($breakpoint, $grid-breakpoints);

    @each $value in $displays {
      .d#{$infix}-#{$value} { display: $value !important; }
    }
  }
}

SassMeister-output.css

.d-none {
  display: none !important;
}

.d-inline {
  display: inline !important;
}

.d-inline-block {
  display: inline-block !important;
}

.d-block {
  display: block !important;
}

.d-table {
  display: table !important;
}

.d-table-row {
  display: table-row !important;
}

.d-table-cell {
  display: table-cell !important;
}

.d-flex {
  display: flex !important;
}

.d-inline-flex {
  display: inline-flex !important;
}

@media (min-width: 480px) {
  .d-sm-none {
    display: none !important;
  }

  .d-sm-inline {
    display: inline !important;
  }

  .d-sm-inline-block {
    display: inline-block !important;
  }

  .d-sm-block {
    display: block !important;
  }

  .d-sm-table {
    display: table !important;
  }

  .d-sm-table-row {
    display: table-row !important;
  }

  .d-sm-table-cell {
    display: table-cell !important;
  }

  .d-sm-flex {
    display: flex !important;
  }

  .d-sm-inline-flex {
    display: inline-flex !important;
  }
}
@media (min-width: 730px) {
  .d-md-none {
    display: none !important;
  }

  .d-md-inline {
    display: inline !important;
  }

  .d-md-inline-block {
    display: inline-block !important;
  }

  .d-md-block {
    display: block !important;
  }

  .d-md-table {
    display: table !important;
  }

  .d-md-table-row {
    display: table-row !important;
  }

  .d-md-table-cell {
    display: table-cell !important;
  }

  .d-md-flex {
    display: flex !important;
  }

  .d-md-inline-flex {
    display: inline-flex !important;
  }
}
@media (min-width: 1024px) {
  .d-lg-none {
    display: none !important;
  }

  .d-lg-inline {
    display: inline !important;
  }

  .d-lg-inline-block {
    display: inline-block !important;
  }

  .d-lg-block {
    display: block !important;
  }

  .d-lg-table {
    display: table !important;
  }

  .d-lg-table-row {
    display: table-row !important;
  }

  .d-lg-table-cell {
    display: table-cell !important;
  }

  .d-lg-flex {
    display: flex !important;
  }

  .d-lg-inline-flex {
    display: inline-flex !important;
  }
}
@media (min-width: 1250px) {
  .d-xl-none {
    display: none !important;
  }

  .d-xl-inline {
    display: inline !important;
  }

  .d-xl-inline-block {
    display: inline-block !important;
  }

  .d-xl-block {
    display: block !important;
  }

  .d-xl-table {
    display: table !important;
  }

  .d-xl-table-row {
    display: table-row !important;
  }

  .d-xl-table-cell {
    display: table-cell !important;
  }

  .d-xl-flex {
    display: flex !important;
  }

  .d-xl-inline-flex {
    display: inline-flex !important;
  }
}

SassMeister-rendered.html

<div class="foo">Hello</div>

<div class="bar">Hello</div>