Converting JSON to YAML in JavaScript

Simple script to convert Json To Yaml

Json To Yaml

JSON and YAML are two commonly used data serialization formats. JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. YAML (YAML Ain’t Markup Language) is a human-readable data serialization format that is often used for configuration files and data exchange between languages.

In this article, we will be discussing a JavaScript code that converts JSON data to YAML data using the js-yaml package.

The first thing we do in the code is require the fs and js-yaml packages. The fs package is a built-in Node.js module that provides an API for working with the file system. The js-yaml package is a third-party package that allows us to work with YAML data.

const fs = require("fs");
const jsYaml = require("js-yaml");

Next, we get the input file path and output file path from the command line arguments using the process.argv array.

const inputFilePath = process.argv[2];
const outputFilePath = process.argv[3];

We then use the fs.readFileSync() method to read the input file and store its contents in a variable called jsonData. The "utf8" argument specifies the file encoding.

const jsonData = fs.readFileSync(inputFilePath, "utf8");

We then use the JSON.parse() method to parse the jsonData into a JavaScript object called parsedData.

const parsedData = JSON.parse(jsonData);

We then use the jsYaml.dump() method to convert the parsedData object to YAML data and store it in a variable called yamlData.

const yamlData = jsYaml.dump(parsedData);

Finally, we use the fs.writeFileSync() method to write the yamlData to the output file. The "utf8" argument specifies the file encoding.

fs.writeFileSync(outputFilePath, yamlData, "utf8");

If any errors occur during the reading or writing of the files, we catch them using a try...catch block and log the error message to the console.

try {
  // read and write files here
} catch (error) {
  console.error(`Error reading/writing file: ${error.message}`);
  process.exit(1);
}

In conclusion, this JavaScript code is a simple and effective way to convert JSON data to YAML data using the js-yaml package. It demonstrates how to use the fs and js-yaml packages, and how to read and write files using the Node.js file system API.

Source Code : https://github.com/rtiwariops/CodeHub/tree/main/utility/json2yaml-node