cssgrid/CSSGridAutoFlow A string type that is used for CSS grid to control how the auto-placement algorithm works, specifying exactly how auto-placed items get flowed into the grid. 1.60.0 Insert auto-placed items by filling each row. Insert auto-placed items by filling each column. Insert auto-placed items by filling each row, and fill any holes in the grid. Insert auto-placed items by filling each column, and fill any holes in the grid.