Node.js fsPromises.utimes() Method

The fsPromises.utimes() method is used to asynchronously change the modification and access timestamps of a file. The timestamps can be specified using a number, string, or Date object. An error would be thrown if the timestamp cannot be converted to a proper number, or is NaN, Infinity or -Infinity.

It changes the file system timestamps of the object referenced by path then resolves the Promise with no arguments upon success.

Syntax:

fsPromises.utimes( path, atime, mtime )

Parameters: This method accepts three parameters as mentioned above and described below:

• path: It is a string that denotes the path of the file whose timestamps have to be changed.
• atime: It is number, string or Date object that denotes the new access timestamp to be set.
• mtime: It is number, string or Date object that denotes the new modification timestamp to be set.

The atime and mtime arguments follow these rules:

1. Values can be either number representing Unix epoch time, Dates, or a numeric string like '123456789.0'.
2. If the value can not be converted to a number, or is NaN, Infinity or -Infinity, an Error will be thrown.

Example: This example to illustrate the fsPromises.utimes() method in Node.js. Create a example_gfg.txt file for input.

Filename: index.js Step to run this program: Run index.js file using the following command:

node index.js

Output:

Details before changing time:
Modification Time: 2020-06-11T17:25:51.136Z
Access Time: 2020-06-11T16:50:51.223Z

Details after changing time:
Changed Modification Time: 2020-06-11T17:25:51.136Z
Changed Access Time: 2020-06-11T16:50:51.223Z

Reference: https://nodejs.org/api/fs.html#fs_fspromises_utimes_path_atime_mtime