Sometimes, we want to parse a JSON object to a TypeScript object.

In this article, we’ll look at how to parse a JSON object to a TypeScript object.

How to parse a JSON object to a TypeScript object?

To parse a JSON object to a TypeScript object, we use the JSON.parse method.

For instance, we write

interface Employee {
  departmentId: number;
  permissionsId: number;
  maxWorkHours: number;
  employeeId: number;
  firstName: string;
  lastName: string;
}

const jsonObj: any = JSON.parse(employeeString);
const employee: Employee = <Employee>jsonObj;

to define the Employee interface.

Then we call JSON.parse with the employeeStrigng JSON object string to parse it.

Next, we assign the jsonObj object to employee to and use <Employee> to cast it to an Employee object.

Conclusion

To parse a JSON object to a TypeScript object, we use the JSON.parse method.