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Node.js stats.mtimeMs Property from fs.Stats Class

  • Last Updated : 29 Jun, 2020

The stats.mtimeMs property is an inbuilt application programming interface of the fs.Stats class is used to get the timestamp when the file is modified last time since the POSIX epoch expressed in milliseconds.

Syntax:

stats.mtimeMs;

Parameters: This property does not accept any parameters.

Return Value: It returns a number or BigInt value that represents the timestamp when the file is modified last time since the POSIX epoch expressed in milliseconds.

Below examples illustrate the use of stats.mtimeMs property in Node.js:
Example 1:






// Node.js program to demonstrate the   
// stats.mtimeMs Property
  
// Accessing fs module
const fs = require('fs');
  
// Calling fs.Stats stats.mtimeMs
// property using stat
fs.stat('./', (err, stats) => {
    if (err) throw err;
  
    // The timestamp when the file
    // is last modified (in MS) 
    console.log("Using stat: " + stats.mtimeMs);
});
  
// Using lstat
fs.lstat('./filename.txt', (err, stats) => {
    if (err) throw err;
  
    // The timestamp when the file 
    // is last modified (in MS)
    console.log("Using lstat: " 
            + stats.mtimeMs);
});

Output:

Using stat: 1592665056784.809
Using lstat: 1592665183682.0176

Example 2:




// Node.js program to demonstrate the   
// stats.mtimeMs Property
  
// Accessing fs module
const fs = require('fs').promises;
  
// Calling fs.Stats stats.mtimeMs
(async () => {
    const stats = await fs.stat('./filename.txt');
  
    // The timestamp when the file
    // is last modified (in MS) 
    console.log("using stat synchronous: "
                + stats.mtimeMs);
})().catch(console.error)

Output:

Using stat synchronous: 1592665183682.0176

Note: 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_mtimems




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