React Js require ‘fs’
In create-react-app they have stubbed out ‘fs’. You cannot import it. They did this because fs is a node core module. You’ll have to find another solution to that problem. See this ticket.
fs
How to read the content of files synchronously in Node.js?
You need to use readFileSync, your method is still reading the files asynchronously, which can result in printing the contents out of order depending on when the callback happens for each read. var fs = require(‘fs’), files = fs.readdirSync(__dirname + ‘/files/’); files.forEach(function(file) { var contents = fs.readFileSync(__dirname + ‘/files/’ + file, ‘utf8’); console.log(contents); })
How to read csv file in node js
Use a library, CSV has lots of gotchas. I have come to enjoy the package csv. It is located here: https://www.npmjs.com/package/csv . Here is a very quick example using the async api. const fs = require(‘fs’) var parse = require(‘csv-parse’) fs.readFile(inputPath, function (err, fileData) { parse(fileData, {columns: false, trim: true}, function(err, rows) { // Your … Read more
Node fs copy a folder
You can use fs-extra to copy contents of one folder to another like this var fs = require(“fs-extra”); fs.copy(‘/path/to/source’, ‘/path/to/destination’, function (err) { if (err) return console.error(err) console.log(‘success!’) }); There’s also a synchronous version. fs.copySync(‘/path/to/source’, ‘/path/to/destination’)
How do I use chmod with Node.js
According to its sourcecode /lib/fs.js on line 508: fs.chmodSync = function(path, mode) { return binding.chmod(pathModule._makeLong(path), modeNum(mode)); }; and line 203: function modeNum(m, def) { switch (typeof m) { case ‘number’: return m; case ‘string’: return parseInt(m, 8); default: if (def) { return modeNum(def); } else { return undefined; } } } it takes either an … Read more
Uncaught TypeError: URL is not a constructor using WHATWG URL object support for electron
I faced the same issue, then I looked into the url module and found a solution For Node V6 use, const URL = require(‘url’).Url; or const { Url } = require(‘url’); If you look into the module, it exports 5 methods one of which is Url, so if you need to access Url, you can … Read more
Node fs Error: EPERM: operation not permitted, open
For the benefit of searchers; I has this error. I added full permissions for Everyone as a test, but that didn’t fix it. The issue was that the file was set to readonly (by source control). Unchecking the readonly option in the file properties fixed the issue.
Find absolute base path of the project directory
Another way to find your project’s root directory now is this: var base = process.env.PWD Note that this is not the same as process.cwd(). Instead it is the directory where you ran the meteor command, which is typically what you are looking for. Note also that this probably won’t be very helpful when running your … Read more
Write a line into a .txt file with Node.js
Inserting data into the middle of a text file is not a simple task. If possible, you should append it to the end of your file. The easiest way to append data some text file is to use build-in fs.appendFile(filename, data[, options], callback) function from fs module: var fs = require(‘fs’) fs.appendFile(‘log.txt’, ‘new data’, function … Read more