{"id":103553,"date":"2021-12-01T09:00:47","date_gmt":"2021-12-01T03:30:47","guid":{"rendered":"https:\/\/data-flair.training\/blogs\/?p=103553"},"modified":"2021-12-01T12:26:07","modified_gmt":"2021-12-01T06:56:07","slug":"nodejs-file-system","status":"publish","type":"post","link":"https:\/\/data-flair.training\/blogs\/nodejs-file-system\/","title":{"rendered":"NodeJS File System"},"content":{"rendered":"

Nodejs has a builtin module for the file system. We will be using this to perform various operations on files like creating, updating, renaming, deleting etc. So let’s start!!!<\/p>\n

Nodejs Create File:<\/h3>\n

It has mainly 3 methods as below:<\/p>\n

1. Append file<\/h4>\n

The fs.appendFile() method\u2019s second argument takes the text that we want to append, and then it appends at the end of the file if the given file does not exist then the file will be created.<\/p>\n

Syntax:<\/strong><\/p>\n

fs.appendfile(filename,text,callback)<\/p>\n

Code for appending text in a file:<\/strong><\/p>\n

var fs=require(\u2018fs\u2019)\r\nfs.appendFile('DataFlairDemo.txt', 'welcome to DataFlair', function (err) {\r\nif (err) throw err;\r\nconsole.log('Saved!');\r\n});<\/pre>\n
Output<\/strong><\/p>\n
\"nodejs<\/a><\/p>\n
2. Open file<\/h4>\n
The fs.open() method\u2019s second argument is “w” for “writing”, which indicates that the file is opened for writing and if it does not exist then an empty file is created.<\/p>\n
Syntax:<\/strong><\/p>\n
fs.open(path, flags[, mode], callback)<\/p>\n
Parameter:<\/strong><\/p>\n