How to beautify/prettify a Json/JS file in a node.js script

Question

I am searching a way to prettify Json files in a node.js script (not CLI). I found a lot of npm beautifier packages, but none that can simply beautify directly a file.

There is esbeautifier that do what I am searching to do, but the exemples only shows CLI commands: https://github.com/royriojas/esbeautifier Is there a way to use it in a Javascript?

Answer 1

You can prettyprint JSON easily by providing parameters to JSON.stringify() .

Many people use this kind of call to prettyprint JSON output. It's still valid JSON, it just contains indentation and newlines.

 JSON.stringify(myObject, null, 2);

Answer 2

you can use the tool esformatter .

edit by @jck: here is JS snippet that works using fs:

var esformatter = require('esformatter');
var fs = require('fs');
var filename = "./myFile.json";
var codeStr = fs.readFileSync(filename).toString();
var formattedCode = esformatter.format(codeStr);
fs.writeFile(filename, formattedCode);

Answer 3

Alternatively, check out prettyjson ! It has been great for me!