Reading and Writing Files In Node.Js Using Modules.

PREREQUISITE: Node.js, Javascript basics

Modules in node.JS are used to carry out various functions because they contain various functionalities that can be used to carry out various functions.The "fs"-file system module contains the functionality needed to complete the above task.

Reading Files

STEP 1

The first step which applies for the both reading and writing the files is to require the module “fs” module that contains the functionality necessary, then assigning it to a variable as seen below.

STEP 2
The variable is then used to access the readFileSync method. readFileSync takes two parameters, the path to the content to be read and "encoding(utf-8)".

readFileSync("path","encoding")

The string content of the path can then be seen through the console.

WRITING FILES

STEP 1

The first step which applies for the both reading and writing the files is to require the module “fs” module that contains the functionality necessary, then assigning it to a variable.

STEP 2: The variable is then accessed in order to call the writeFileSync function, which has two parameters: the path to the file we're writing to, and the string that will be written there.

writeFileSync(path,”string”).

const readWrite = require("fs");

const write = readWrite.writeFileSync("path", "string to be written");

This process doesn't need to be saved to a variable because it only writes the given string to the specified directory and doesn't return anything. writeFileSync() creates the required file even if the path specified hasn't been created yet.