npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

json-patcher

v1.7.0

Published

Either generates diffs or applies diffs between objects in js (json)

Downloads

11

Readme

JSON-patcher

Diff

Generate a series of instructions to get from an object to another object.


import { diff } from 'json-patcher';

let a = {
    'foo': 'bar'
}

let b = {
    'bar': 'baz'
}

console.log(diff(a, b));

/*
[
  [
    "DEL",
    [],
    "foo"
  ],
  [
    "SET",
    [
      "bar"
    ],
    "baz"
  ]
]
*/

stringDiff(a, b)

Provides a more human readable format of the diff between a and b

import { stringDiff } from 'json-patcher';

let a = {
    'foo': 'bar'
}

let b = {
    'bar': 'baz'
}

console.log(stringDiff(a, b));

/*
DEL: $ - foo
SET: $.bar - baz
*/

apply(a, instructions)

Takes a set of instructions and performs them on an object. Returns the new object.

import { apply } from 'json-patcher';

let a = {
    'foo': 'bar'
}

let instructions = [
    ['DEL', [], 'foo'],
    ['SET', ['bar'], 'baz']
];

let b = apply(a, instructions)

console.log(b);
/*
{
  "bar": "baz"
}
*/

Nice things :)

These are just the things I remember, it's all just nice of course :P

Noop

The output of diff(a, a) is always an empty set of instructions, which is a noop.

Primitives

The diff and apply functions both work on primitives. Meaning it can generate instructions for converting an object to a primitive and apply those instructions to get a primitive.

All pairs of the following are tested together:

  • empty object
  • number
  • string
  • boolean
  • simple non empty object (e.g. {'foo': 'bar'}
  • deep object (e.g. {'foo': {'bar': 'baz': 'bat'}}})
  • array
  • complex object (e.g. an object with multiple types as keys)
  • null
  • undefined