autoprefixer/test/cases/multicolumn.css

.a {
  break-inside: auto;
  break-before: auto;
  break-after: auto;
}

.b {
  break-inside: avoid;
}

.c {
  break-inside: avoid-column;
}

.d {
  break-inside: avoid-page;
}

.e {
  break-inside: avoid-region;
}

.f {
  break-inside: region;
}