Introduction
prettyjson is an incredibly useful Node.js library that formats JSON data and JSON-like structures in a more readable and colored CLI output. Whether you are debugging or just want more readable JSON data, prettyjson makes it easy. In this comprehensive guide, we will explore dozens of useful prettyjson API functions with code snippets and implement an app example using these APIs.
Installation
npm install prettyjson
APIs and Code Snippets
prettyjson.render
This is the primary method used to render JSON data in a pretty format.
const prettyjson = require('prettyjson');
const data = {
name: "John Doe",
age: 29,
location: {
city: "San Francisco",
state: "California"
}
};
console.log(prettyjson.render(data));
prettyjson.renderString
Renders a JSON string in pretty format.
const jsonString = '{"name":"John Doe","age":29,"location":{"city":"San Francisco","state":"California"}}';
console.log(prettyjson.renderString(jsonString));
prettyjson.setColors
Customize the colors used in the output.
prettyjson.setColors({
keys: 'blue',
dash: 'green',
string: 'yellow'
});
console.log(prettyjson.render(data));
Implementing an App example
Let’s create a simple Node.js app that fetches user data from an API and prints it in a readable format using prettyjson.
const prettyjson = require('prettyjson');
const fetch = require('node-fetch');
async function fetchUserData() {
const response = await fetch('https://jsonplaceholder.typicode.com/users/1');
const userData = await response.json();
console.log(prettyjson.render(userData));
}
fetchUserData();
By following the above guidelines and utilizing the powerful APIs offered by prettyjson, you can significantly enhance the readability and debugging process of your JSON data in Node.js applications.
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