Factory functions

https://wanago.io/2019/12/02/javascript-design-patterns-factories-typescript/

In the code above, we specify explicitly that when we create a music teacher, we need to pass the properties of a music teacher. Otherwise, the TypeScript compiler would throw an error.

const codingTeacher = TeacherFactory.getTeacher(TEACHER_TYPE.CODING, {
  programmingLanguage: 'JavaScript',
  name: 'John',
});
 
const musicTeacher = TeacherFactory.getTeacher(TEACHER_TYPE.MUSIC, {
  instrument: 'Guitar',
  name: 'Andy',
});

Thanks to proper typing, TypeScript now knows that the codingTeacher, for example, is an instance of the CodingTeacher class.

console.log(codingTeacher.instrument);

Comments

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