← Back tothis vs that

void vs never

Written byPhuoc Nguyen
24 Aug, 2023
TypeScript has two types, `never` and `void`, which represent the absence of a value. While they may seem similar, it's important to know the key differences between them. Let's dive in and explore!


The `void` type represents the absence of a value. It's typically used as the return type for functions that don't return a value.
const log = (message: string): void {
In the example above, the `log` function doesn't give back any value, which means that its return type is `void`.


The `never` type represents the absence of a value that will never occur. It's handy in two scenarios:
  • When a function always throws an error.
In the following example, the `throwError` function will always throw an error and never return a value.
const throwError = (): never => {
throw new Error('Something went wrong');
  • When a function never finishes.
The code inside the `infiniteLoop` function never finishes executing because it contains an endless loop.
const infiniteLoop = (): never => {
while (true) {
// Do something indefinitely ...


When it comes to `void` and `never`, it's important to understand their distinctions. `void` represents the absence of a value that could happen, while `never` represents the absence of a value that will never happen.
To put it simply, `void` is used when a function may or may not return a value, while `never` is used when a function will never return a value.

See also

Questions? 🙋

Do you have any questions? Not just about this specific post, but about any topic in front-end development that you'd like to learn more about? If so, feel free to send me a message on Twitter or send me an email. You can find them at the bottom of this page.
I have a long list of upcoming posts, but your questions or ideas for the next one will be my top priority. Let's learn together! Sharing knowledge is the best way to grow 🥷.

Recent posts ⚡

Newsletter 🔔

If you're into front-end technologies and you want to see more of the content I'm creating, then you might want to consider subscribing to my newsletter.
By subscribing, you'll be the first to know about new articles, products, and exclusive promotions.
Don't worry, I won't spam you. And if you ever change your mind, you can unsubscribe at any time.
Phước Nguyễn