渲染表格时，默认勾选某些行

把数据行的LAY_CHECKED设置为true

var rowsToSelect = [11,22];//需要默认选中的行id
data.forEach(item=>{
  if(rowsToSelect.includes(item.id)){
    item.LAY_CHECKED=true;
  }
});
// 渲染表格
table.render({
  elem: '#batchWarehousePackTable',
  id:'batchWarehousePackTable',
  cols: [[
    {type: "checkbox",width: 30}, 
    {field: 'purBaseNum', title: `采购基数<span style="color:red;font-size:12px;">(注意采购基数的影响!)</span>`,width:120},
    {field: 'note', title: `<div>下单备注<i id="delNote" class="layui-icon layui-icon-delete" style="color:red;font-size:30px;" lay-tips="对已勾选的SKU的下单备注清空！"></i></div>`,templet:"#noteTpl",width:350},
  ]],
  data: res,
  height:502,
  page: false,
  limit:9999,
});