Function copyFile

copyFile(src: PathLike, dest: PathLike, mode?: number): 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.
```
import { constants } from "fs";
import { copyFile } from "fs/promises";

try {
  await copyFile("source.txt", "destination.txt");
  console.log("source.txt was copied to destination.txt");
} catch {
  console.log("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.log("The file could not be copied");
}
```
Since
v0.0.67

Returns
Fulfills with undefined upon success.
Parameters
- src: PathLike
  
  source filename to copy
- dest: PathLike
  
  destination filename of the copy operation
- Optional mode: number
  
  Optional modifiers that specify the behavior of the copy operation. It is possible to create a mask consisting of the bitwise OR of two or more values (e.g. fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE)
Returns Promise<void>
copyFile(src: PathLike, dest: PathLike, mode?: number): 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.
```
import { constants } from "fs";
import { copyFile } from "fs/promises";

try {
  await copyFile("source.txt", "destination.txt");
  console.log("source.txt was copied to destination.txt");
} catch {
  console.log("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.log("The file could not be copied");
}
```
Since
v0.0.67

Returns
Fulfills with undefined upon success.
Parameters
- src: PathLike
  
  source filename to copy
- dest: PathLike
  
  destination filename of the copy operation
- Optional mode: number
  
  Optional modifiers that specify the behavior of the copy operation. It is possible to create a mask consisting of the bitwise OR of two or more values (e.g. fs.constants.COPYFILE_EXCL | fs.constants.COPYFILE_FICLONE)
Returns Promise<void>

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