Node.js stats.mtimeNs Property
Last Updated :
07 Oct, 2021
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The stats.mtimeNs property is an inbuilt application programming interface of the fs.Stats class used to get the timestamp when the file is modified last time since the POSIX epoch expressed in nanoseconds.
Syntax:
javascript
Output:
javascript
Output:
stats.mtimeNs;Parameters: Properties does not have any parameter, but during creation of stats object {bigint:true} must be passed as options. Return Value: It returns a number or BigInt value which represents the timestamp when the file is modified last time since the POSIX epoch expressed in nanoseconds. Below examples illustrate the use of stats.mtimeNs property in Node.js: Example 1:
// Node.js program to demonstrate the
// stats.mtimeNs property
// Accessing fs module
const fs = require('fs');
// Calling fs.Stats stats.mtimeNs using stat
fs.stat('./', { bigint: true }, (err, stats) => {
if (err) throw err;
// The timestamp when the file
// is last modified (in NS)
console.log("Using stat: " + stats.mtimeNs);
});
// Using lstat
fs.lstat('./filename.txt',
{ bigint: true }, (err, stats) => {
if (err) throw err;
// The timestamp when the file
// is last modified (in NS)
console.log("Using lstat: " + stats.mtimeNs);
});
Using stat: 1592665056784809 Using lstat: 15926651836820176Example 2:
// Node.js program to demonstrate the
// stats.mtimeNs property
// Accessing fs module
const fs = require('fs').promises;
// Calling fs.Stats stats.mtimeNs
(async () => {
const stats = await fs.stat(
'./filename.txt', { bigint: true });
// The timestamp when the file
// is last modified (in NS)
console.log("Using stat synchronous: "
+ stats.mtimeNs);
})().catch(console.error)
Using stat synchronous: 15926651836820176Note: The above program will compile and run by using the
node filename.js command and use the file_path correctly.
Reference: https://nodejs.org/api/fs.html#fs_stats_mtimens
