function validateHeaderName
Usage in Deno
```typescript import { validateHeaderName } from "node:node__http.d.ts"; ```
validateHeaderName(name: string): void
Performs the low-level validations on the provided `name` that are done when `res.setHeader(name, value)` is called.
Passing illegal value as `name` will result in a `TypeError` being thrown,
identified by `code: 'ERR_INVALID_HTTP_TOKEN'`.
It is not necessary to use this method before passing headers to an HTTP request
or response. The HTTP module will automatically validate such headers.
Example:
```js
import { validateHeaderName } from 'node:http';
try {
validateHeaderName('');
} catch (err) {
console.error(err instanceof TypeError); // --> true
console.error(err.code); // --> 'ERR_INVALID_HTTP_TOKEN'
console.error(err.message); // --> 'Header name must be a valid HTTP token [""]'
}
```
void