How to Use Streaming Parsing in JavaScript? Last Updated : 21 May, 2024 Comments Improve Suggest changes Like Article Like Report Streaming parsing in JavaScript, particularly for large JSON files, processes data efficiently without loading the entire file into memory. This method is useful for handling large datasets and avoids memory issues by reading and processing data in chunks. It's especially beneficial for large files and network data streams. ApproachCreate a data.json file and an index.js file.Create a package.json file and install dependencies from npm using the npm i JSONStream for streaming and parsing in JavaScript.The code uses the fs module to create a read stream for data.json and the JSONStream module to parse the JSON data incrementally. Run the below command for the package.json file: npm init -yInstall the required dependencies for streaming and parsing by running the following command: npm i JSONStream Example: The example below shows how to use streaming parsing in JavaScript. JavaScript const fs = require('fs'); const JSONStream = require('JSONStream'); const stream = fs.createReadStream('data.json', { encoding: 'utf8' }); const parser = JSONStream.parse('*'); stream.pipe(parser); parser.on('data', (obj) => { console.log('Parsed object:', obj); }); parser.on('end', () => { console.log('Parsing complete.'); }); parser.on('error', (error) => { console.error('Error occurred:', error); }); JavaScript // data.json [ {"id": 1, "name": "GFG1"}, {"id": 2, "name": "GFG2"}, {"id": 3, "name": "GFG3"} ] Run the below command: node index.jsOutput: Output Comment More infoAdvertise with us Next Article How to Use Streaming Parsing in JavaScript? M muskangupnre1 Follow Improve Article Tags : JavaScript Web Technologies JSON Similar Reads How to Stream Response in JavaScript? Streaming responses in JavaScript refers to the process of handling data from a server in chunks as it arrives, rather than waiting for the entire response to be received before processing it. This can be particularly useful for handling large datasets, real-time data, or improving the perceived per 3 min read How to Parse XML in JavaScript? Parsing XML data is important because it allows JavaScript applications to extract structured information from XML documents. We will explore two different approaches to Parse XML in JavaScript. Below are the approaches to parsing XML in JavaScript: Table of Content Using DOM ParserUsing xml2js Libr 2 min read How to Parse JSON in JavaScript ? Parse JSON in JavaScript, accepting a JSON string as input and returning a corresponding JavaScript object with two methods, using JSON.parse() for parsing JSON strings directly and employing the fetch API to parse JSON responses from web APIs. These techniques are crucial for seamless data manipula 2 min read How to do Piping/Streaming of JavaScript objects in Node.js ? Node.js is well-known for its non-blocking I/O and stream-based data processing capabilities. While streams are typically used for handling raw binary data or strings, Node.js also provides mechanisms to stream JavaScript objects. This can be particularly useful for handling large datasets, processi 5 min read How to parse URL using JavaScript ? Given an URL and the task is to parse that URL and retrieve all the related data using JavaScript. Example: URL: https://www.geeksforgeeks.org/courses When we parse the above URL then we can find hostname: geeksforgeeks.com path: /courses Method 1: In this method, we will use createElement() method 2 min read Like