[英]Unable to assign value to key in Object in angular/typescript
I work on angular and I am unable to assign value to the key. 我在角度上工作,无法为键分配值。 My model is like below 我的模特如下
export class aa{
types: bb[];
}
export interface bb{
name: string;
age: string;
}
On my ts file, I did: 在我的ts文件中,我做了:
newType: bb;
initValues(){
this.newType.name = 'Anna'; //error at this line
}
but I am getting an error as cannot get property of undefined
. 但我收到一个错误,因为cannot get property of undefined
。
Where am I going wrong? 我要去哪里错了? How can I assign value to a key in angular 如何为angular中的键分配值
Now you have only declared the type of your newType
property. 现在,您只声明了newType
属性的类型。 You need also to initialize your property 您还需要初始化您的属性
newType: bb = { name: null, age: null };
Or you can say that the properties are optional and don't explicitly assign them null
或者您可以说这些属性是可选的,并且不将它们显式分配为null
export interface bb{
name?: string;
age?: string;
}
newType: bb = { };
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