I would like to use async/await with some filesystem operations. Normally async/await works fine because I use babel-plugin-syntax-async-functions. But with this code I run into the if case where names is undefined: import fs from ‘fs’; async function myF() { let names; try { names = await fs.readdir(‘path/to/dir’); } catch (e) { console.log(‘e’, e); } … Read more
Is there an easier way to copy a folder and all its content without manually doing a sequence of fs.readir, fs.readfile, fs.writefile recursively? I am just wondering if I’m missing a function which would ideally work like this: fs.copy(“/path/to/source/folder”, “/path/to/destination/folder”); 29 Answers 29
How do i check the existence of a file? In the documentation for the module fs there’s a description of the method fs.exists(path, callback). But, as I understand, it checks for the existence of only directories. And I need to check the file! How can this be done? 20 Answers 20
I’m trying to create a full path if it doesn’t exist. The code looks like this: var fs = require(‘fs’); if (!fs.existsSync(newDest)) fs.mkdirSync(newDest); This code works great as long as there is only one subdirectory (a newDest like ‘dir1’) however when there is a directory path like (‘dir1/dir2’) it fails with Error: ENOENT, no such … Read more
I am trying to write JSON file using node from loop data, e.g.: let jsonFile = require(‘jsonfile’); for (i = 0; i < 11; i++) { jsonFile.writeFile(‘loop.json’, “id :” + i + ” square :” + i * i); } outPut in loop.json is: id :1 square : 1 but I want output file like … Read more
How can I get the file name from an absolute path in Nodejs? e.g. “foo.txt” from “/var/www/foo.txt” I know it works with a string operation, like fullpath.replace(/.+\//, ”), but I want to know is there an explicit way, like file.getName() in Java? 7 Answers 7
I can’t seem to get any search results that explain how to do this. All I want to do is be able to know if a given path is a file or a directory (folder). 7 s 7 The following should tell you. From the docs: fs.lstatSync(path_string).isDirectory() Objects returned from fs.stat() and fs.lstat() are of … Read more
How do I download a file with Node.js without using third-party libraries? I don’t need anything special. I only want to download a file from a given URL, and then save it to a given directory. 30 s 30 You can create an HTTP GET request and pipe its response into a writable file stream: … Read more
I am trying to append a string to a log file. However writeFile will erase the content each time before writing the string. fs.writeFile(‘log.txt’, ‘Hello Node’, function (err) { if (err) throw err; console.log(‘It\’s saved!’); }); // => message.txt erased, contains only ‘Hello Node’ Any idea how to do this the easy way? 18 s … Read more
How can I synchronously check, using node.js, if a file or directory exists? 1 18 The answer to this question has changed over the years. The current answer is here at the top, followed by the various answers over the years in chronological order: Current You can use fs.existsSync(): const fs = require(“fs”); // Or … Read more
