What is the process for displaying the attributes of a custom object in Typescript?

I need help returning an array of prop: value pairs for a custom object using the myObject[stringProp] syntax. However, I keep encountering this error message:

     TS7053: Element implicitly has an 'any' type because expression of type 'string' can't be used to index type '{} | EmployeeListDataRow'.
  No index signature with a parameter of type 'string' was found on type '{} | EmployeeListDataRow'.
  <h1>
    {Object.keys(currentEmployee).map((prop) => {
      return `${prop}: ${currentEmployee[prop]}\n`;
    })}
  </h1>

The structure of the currentEmployee interface is as follows:

export interface EmployeeListDataRow extends Object {
  id: number;
  name: string;
  startDate: Date;
  status: string;
  manager: string;
  title: string;
  account: string;
  team: string;
  rate: number;
  totalComp: number;
  gm: number;
  ebit: number;
  billable: string;
  phone: string;
  skills: string;
}

Answer №1

The reason is that TypeScript needs to be explicitly informed that EmployeeListDataRow can be indexed by a string. To address this, you should update your interface to specify that it is string indexable:

export interface EmployeeListDataRow {  
  [key: string]: number | string | Date;   
  id: number;
  name: string;
  startDate: Date;
  status: string;
  manager: string;
  title: string;
  account: string;
  team: string;
  rate: number;
  totalComp: number;
  gm: number;
  ebit: number;
  billable: string;
  phone: string;
  skills: string;
}

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