There are multiple ways to covert Yaml to JSON in Node.js. But in this article, 2 most popular packages js-yaml
& yaml
are covered with examples.
1). Comparision of js-yaml & yaml packages
2). How to use js-yaml ?
2.1). Yaml to JSON example
2.2). JSON to Yaml example
3). How to use yaml ?
3.1) Yaml to JSON example
3.2) JSON to Yaml example
4). Conclusion
1.Comparision of js-yaml & Yaml packages
js-yaml
is a JavaScript implementation of the YAML language, which means it is written in JavaScript and can be used in Node.js or in the browser. It provides a simple API for parsing and dumping YAML documents, as well as support for custom types and references. One advantage of using js-yaml
is that it is actively maintained and has a large community, so any issues or bugs are likely to be addressed quickly.
On the other hand, yaml
is a native C++ YAML parser and emitter for Node.js, which means it is a Node.js addon and requires compilation. It provides a fast and efficient way to parse and emit YAML documents, and supports custom types and schemas. One advantage of using yaml
is its performance, which is significantly faster than js-yaml
for large documents.
In terms of features, both packages support most of the YAML 1.2 specification, including anchors, aliases, and custom tags. However, js-yaml
provides more flexibility and control over the parsing and dumping process, while yaml
focuses on speed and efficiency.
2.How to use js-yaml
To convert JSON to YAML using Node.js, you can use the js-yaml
package to dump the JSON object to a YAML string and write it to a new file.
Install the js-yaml
package by running the following command in your terminal:
npm install js-yaml
2.1. Yaml to JSON example
Use yaml.load()
to convert Yaml to JSON. Below is the complete code.
//Load the package const yaml = require('js-yaml'); const fs = require('fs'); //Read the Yaml file const data = fs.readFileSync('input_file.yml', 'utf8'); //Convert Yml object to JSON const yamlData = yaml.load(data); //Write JSON to Yml const jsonData = JSON.stringify(yamlData); fs.writeFileSync('input_file.json', jsonData, 'utf8');
2.1. JSON to Yaml example
Use yaml.dump()
method to convert JSON to Yaml. Below is the complete code.
//Load the package const yaml = require('js-yaml'); const fs = require('fs'); //Read the JSON file const data = fs.readFileSync('input_file.json', 'utf8'); const jsonData = JSON.parse(data); //Convert JSON to Yaml const yamlData = yaml.dump(jsonData); //Save to file fs.writeFileSync('path/to/your/yaml/file.yml', yamlData, 'utf8');
3.How to use yaml package
Install the yaml
package by running the following command in your terminal:
npm install yaml
3.1. Yaml to JSON example
To convert Yaml to JSON object, use the yaml.parse
method, Below is the complete code.
//Load package const yaml = require('yaml'); const fs = require('fs'); //Read file and convert to JSON const obj = yaml.parse(fs.readFileSync('input_file.yaml', 'utf8')); console.log(obj);
3.1. JSON to Yaml example
To convert JSON to YAML, use the yaml.stringify
method: Below is the complete code
//Load the package const yaml = require('yaml'); const fs = require('fs'); //Read the JSON file const data = fs.readFileSync('input_file.json', 'utf8'); const jsonData = JSON.parse(data); //Convert JSON to Yaml const yamlData = yaml.stringify(jsonData); //Save to file fs.writeFileSync('path/to/your/yaml/file.yml', yamlData, 'utf8');
4.Conclusion
In summary, if you need a JavaScript-based YAML parser and emitter with good flexibility and community support, js-yaml
is a good choice. If you need maximum performance and efficiency for large documents in Node.js, yaml
is a good choice.
Below is the comparison of trends https://npmtrends.com/js-yaml-vs-yaml