In this blog post, we will explore different methods to check if a file exists in the filesystem using Node.js and the fs
module. We will cover both synchronous and asynchronous approaches.
Using fs.existsSync()
The easiest way to check if a file exists in Node.js is by using the fs.existsSync()
method. This method is synchronous, which means it will block the program until the file’s existence is determined.
const fs = require('fs');
const path = './file.txt';
try {
if (fs.existsSync(path)) {
// File exists
}
} catch(err) {
console.error(err);
}
Using fs.access()
Alternatively, we can check for a file’s existence in an asynchronous way using the fs.access()
method. This method does not open the file, but rather checks if it exists.
const fs = require('fs');
const path = './file.txt';
fs.access(path, fs.F_OK, (err) => {
if (err) {
console.error(err);
return;
}
// File exists
});
Both methods achieve the same result, but the choice between them depends on whether you prefer a synchronous or asynchronous approach in your project.
Hope this guide helps you effectively check the existence of a file in Node.js!