Background image cover + centering

scss

@use "node_modules/sass-basis/src/css/core";

.c-foo {
  @include core.background-image-cover();
  background-image: url(...);
}

Background image fixed

scss

@use "node_modules/sass-basis/src/css/core";

.c-foo {
  @include core.background-image-fixed();
  background-image: url(...);
}