json2yaml

A Deno module that converts a JSON string to a (pretty) YAML string 🦕

Inspired by https://github.com/alexcrist/json-to-pretty-yaml

Note: there already exists a module (stringify()) to convert JavaScript objects to YAML strings in the Deno standard library. Consider using this instead if you prefer working with JavaScript objects!

Module

Basic usage:

import { json2yaml } from "https://deno.land/x/json2yaml/mod.ts";

const jsonString = '{"hello": "world"}';
const yamlString = json2yaml(jsonString);

console.log(yamlString);

Output:

hello: world

You can also specify the number of spaces to use for indents:

const jsonString = '{"foo": ["bar", "baz"]}';
const yamlString = json2yaml(jsonString, 3);

console.log(yamlString);

Output:

foo:
   -  bar
   -  baz

For more documentation, run:

$ deno doc mod.ts

CLI

# Prints output to stdout
$ deno run --allow-read https://deno.land/x/json2yaml/cli.ts -- input.json

# Write contents into output.yaml
$ deno run --allow-read https://deno.land/x/json2yaml/cli.ts -- input.json > output.yaml

You can also use deno install to easily create an alias command:

$ deno install -f --allow-read -n json2yaml https://deno.land/x/json2yaml/cli.ts

# Much shorter!
$ json2yaml -- input.json

Explanation:

• -f: Forcefully overrides previous installations of json2yaml
• --allow-read: Grants read access to the cli
• -n json2yaml: Sets the alias to json2yaml

Testing

$ deno test --allow-read