Utilizing classes as types in TypeScript

Why is it possible to use a class as a type in TypeScript, like word: Word in the provided code snippet?

class Dict {
  private words: Words = {};
// I am curious about this specific line
  add(word: Word) {
    if (!this.words[word.term]) {
      this.words[word.term] = word.def;
    }
  }
}

class Word {
  constructor(term: string, def: string) {}
}

I attempted to grasp this concept by referencing the official documentation, but unfortunately couldn't find any relevant information. https://www.typescriptlang.org/docs/handbook/2/everyday-types.html

Answer №1

Many statically typed languages allow you to achieve this functionality. By adding the Word annotation, you can access the properties of its class.

For further information, check out:

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