getting type error when I try to assign interface to a property-CodePudding

I'm using typescript in my Angular project trying to assign IInfoPage interface to data

    export interface IInfoPage {
      href: string;
      icon: string;
      routing: boolean;
      order: number;
      styleType: string;
    }

    public pageData: IInfoPage;


    this.configService.PageData.subscribe((res) => {
        this.pageData = res.SubMenu.find(data => location.pathname.includes('path'));
    })

But as I see this.pageData alerts and gives me this error:

Type 'ISubMenuType | undefined' is not assignable to type 'IInfoPageSubData'.   Type 'undefined' is not assignable to type 'IInfoPageSubData'.

So How can I solve this issue?

CodePudding user response：

Array.find() can always return undefined, so you'll need to check whether or not find has returned a result.

const result = res.SubMenu.find(data => location.pathname.includes('path'));

if(result)
  this.pageData = result;