Null or undefined for data?

Question

I'm using vuex-module-decorators and I would like to know if I should set the default value of a data property to null or undefined. Example:

export default class ComponentName extends Vue {
 post: BlogPost | null = null
}

or

export default class ComponentName extends Vue {
 post: BlogPost | undefined = undefined
}

Is there a right answer?

Does this answer your question? [What is the difference between null and undefined in JavaScript?](https://stackoverflow.com/questions/5076944/what-is-the-difference-between-null-and-undefined-in-javascript) — Alejandro, Aug 14 '20 at 03:48
Data types are inherited from javascript, so that answer applies to your question. — Radu Diță, Aug 14 '20 at 10:31
It doesn't :). Check the answer, there is context in `null` and `undefined` for state in Vue. — mamonas, Aug 14 '20 at 16:00

score 1 · Accepted Answer · answered Aug 14 '20 at 07:51

1

If state value cannot be determined, it MUST be initialized with null. Just like wheels: number | null = null.

From the docs.

answered Aug 14 '20 at 07:51

Matthias

1 Answers1