The following should be compatible with both approaches:

    .masonry {
      display: grid;
      display: grid-lanes;
      grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
      grid-template-rows: masonry;
    }

Browsers supporting the new syntax will override the `display: grid` with `display: grid-lanes` and ignore the `grid-template-rows: masonry` syntax.