constfs=require("fs");fs.readFile("./large-file.json","utf8",(err,response)=>{if(err){console.error(err);return;}constdata=JSON.parse(response);console.log(data);// your JSON file content as object}); Because thereadFile()method is asynchronous, NodeJS will continue to execute your...
There are three effective methods to read JSON files in JavaScript using fetch(), import statements, and require(). Please check this article which includes examples and outputs with the approach explanation. JSON (JavaScript Object Notation)is a lightweight data interchange format that's easy for...
Sometimes you want to store a JSON object to a file in a Node.js application and then retrieve it later. For example, when you are creating a new RESTful API, storing data on the local file system can be a good choice. You can skip the database setup and save JSON data to a file...
The Node.js documentation advises to use the fs module and do the work of reading the files and parsing it yourself. import { readFile } from 'fs/promises'; const json = JSON.parse( await readFile( new URL('./some-file.json', import.meta.url) ) ); Option 2: Leverage the Common...
To create a JWT in Node.js, you can use thejsonwebtokenpackage. First, import the package in yourapp.jsfile: constjwt=require('jsonwebtoken'); Now, let's create a simple function that generates a JWT. We will use thesign()method from thejsonwebtokenpackage: ...
The simplest way to handle runtime errors is to throw them as Node.js exceptions like above. But this will crash the application and is therefore not recommended except in cases where you have no other choice:const fs = require('fs') fs.readFile('404.txt', 'utf-8', (err, data) =...
Here, NodeJS automatically read the file, parse the content to a JSON object and assigns that to the left hand side variable. It’s as simple as that! Add New Element To Existing JSON Object: Say, you have an existing json object, which you want to modify to add new key/value pair...
Discover how to save a JSON object to file in Node.js, and retrieve it laterSometimes the best way to store some data in a Node.js application is to save it to the filesystem.If you have an object that can be serialized to JSON, you can use the JSON.stringify() method and the ...
Node.js 不是一门语言也不是框架,它只是基于 Google V8 引擎的 JavaScript 运行时环境,同时结合 Libuv 扩展了 JavaScript 功能,使之支持 io、fs 等只有语言才有的特性,使得 JavaScript 能够同时具有 DOM 操作(浏览器)和 I/O、文件读写、操作数据库(服务器端)等能力,是目前最简单的全栈式语言。
Script Execution:NPM enables developers to specify custom scripts within the package.json file, automating repetitive procedures like testing, building, and deployment. This functionality significantly enhances productivity and fosters the adoption of consistent development practices. ...