function promises.copyFile
Usage in Deno
```typescript import { promises } from "node:node__fs.d.ts"; ```
copyFile(): Promise<void>
Asynchronously copies `src` to `dest`. By default, `dest` is overwritten if it
already exists.
No guarantees are made about the atomicity of the copy operation. If an
error occurs after the destination file has been opened for writing, an attempt
will be made to remove the destination.
```js
import { copyFile, constants } from 'node:fs/promises';
try {
await copyFile('source.txt', 'destination.txt');
console.log('source.txt was copied to destination.txt');
} catch {
console.error('The file could not be copied');
}
// By using COPYFILE_EXCL, the operation will fail if destination.txt exists.
try {
await copyFile('source.txt', 'destination.txt', constants.COPYFILE_EXCL);
console.log('source.txt was copied to destination.txt');
} catch {
console.error('The file could not be copied');
}
```
Promise<void>
Fulfills with `undefined` upon success.