javascript - 将成员变量的状态存储在 Angular 2 类中

Question

export class RSDLeadsComponent implements OnInit{
    templateModel:RSDLeads  = {
        "excludedRealStateDomains": [{"domain":""}],
        "leadAllocationConfigNotEditables": [{"attributeName":""}]
    };
    oldResponse:any;
    constructor(private lambdaService:LambdaService, @Inject(APP_CONFIG)private config:IAppConfig ){};
    ngOnInit():void{
        this.getFormData();
    };
    getFormData():void{
        let getPayload = {
            "pageId": "DomainLeads",
            "operationType": "view"
        };
        this.lambdaService.getResponse('LAConfigLambda', getPayload).then((data:any) => {
            const tempData = data;
            this.templateModel.excludedRealStateDomains = data.excludedRealStateDomains;     
            this.oldResponse = tempData.excludedRealStateDomains;
        });
    };
    save(model: RSDLeads, isValid: boolean):void{
        console.log("oldResponse",this.oldResponse);//oldResponse [Object, Object, Object]

    console.log("templateModel",this.templateModel.excludedRealStateDomains);//templateModel [Object, Object, Object]
    }
}

我从服务 lamdaService 返回一个 promise ，其中我将数据从数据库分配给模板/成员变量 templateModel，它通过 template.html 中的表单进行修改。我希望初始/旧响应将其与修改后的响应进行比较，但我没有实现它，因为我已经启动了新变量旧响应，该响应随表单更新，并且我在保存函数中得到了相同的结果。

Answer 1

对象的深拷贝对我有用

this.oldResponse = JSON.parse(JSON.stringify(data.excludedRealStateDomains))