GS: Automatically sorts the 1st column (not the header row) Ascending.

sortBy.onEdit.gs

/**
 * Automatically sorts the 1st column (not the header row) Ascending.
 */
function onEdit(event){
    var sheet = event.source.getActiveSheet();
    var editedCell = sheet.getActiveCell();
    
    var columnToSortBy = 1;
    var tableRange = "A4:Z99"; // What to sort.

    if(editedCell.getColumn() == columnToSortBy){   
        var range = sheet.getRange(tableRange);
        range.sort( { column : columnToSortBy, ascending: false } );
    }
}