layui 定制表格内容，例如数据转换

{field: ‘state‘, title: ‘收费‘, templet: function(d){
                    if(d.state == "0"){
                        return "免费"
                    }
                    else{
                        return "收费"
                    }
                }},

{field: ‘state‘, title: ‘收费(0免费1收费)‘, templet: function(d){
                    if(d.state == "0"){
                        return ‘<button type="button" class="layui-btn layui-btn-xs">免费</button>‘
                    }
                    else{
                        return ‘<button type="button" class="layui-btn layui-btn-xs">收费</button>‘
                    }
                }},