Skip to content
You must be logged in to sponsor josdejong

Become a sponsor to Jos de Jong

@josdejong

Jos de Jong

josdejong
Rotterdam

I'm Jos de Jong, a passionate programmer. In my spare time I love to work on the open source projects jsoneditor and mathjs and some other small projects. I started them long time ago because I needed them myself in my daily life as programmer and engineer. And this is what keeps me motivated: these projects solve an actual need of developers like me, working with JSON data on a daily basis, or working with advanced mathematics in a modern web application. The projects are in good shape, and there is plenty of ideas and improvements just waiting to be implemented.

If you care about jsoneditor or mathjs like I do, please support me via Github Sponsors :)

Current sponsors 13

@grinry
@AJamesPhillips
@dvd101x
@syntaxfm
@farley13
@NullDev
@roboflow
@MRumpold
@NicolasCARPi
@rdnt
@octue
@christianpetty
@sathoro
Past sponsors 32
@rual
@xiaohk
@georgemarklow
Private Sponsor
@cshaa
@parsify-dev
@mitrakov
@szul
@semasquare
@mattvague
@FrontendMasters
@tronfamily
@mariusmitrofan
@le-cardinal
@gdaroch
@joelpalmer
@superstructor
@crazydan

Featured work

  1. josdejong/mathjs

    An extensive math library for JavaScript and Node.js

    JavaScript 14,426
  2. josdejong/jsoneditor

    A web-based tool to view, edit, format, and validate JSON

    JavaScript 11,653
  3. josdejong/workerpool

    Offload tasks to a pool of workers on node.js and in the browser

    JavaScript 2,098
  4. josdejong/lossless-json

    Parse JSON without risk of losing numeric information

    TypeScript 429
  5. josdejong/ducktype

    Flexible data validation using a ducktype interface. For JavaScript and Node.js.

    JavaScript 90
  6. josdejong/propagating-hammerjs

    Extend hammer.js with event propagation

    JavaScript 40

Learn more about sponsoring developers and organizations.

Report abuse

Select a tier

$ a month

You'll receive any rewards listed in the $2 monthly tier. Additionally, a Public Sponsor achievement will be added to your profile.

$1 a month

Select

Math.js supporter

You regularly use mathjs and appreciate it a lot.

$2 a month

Select

JSONEditor supporter

You regularly use JSONEditor and appreciate it a lot.

$5 a month

Select

Math.js BIG fan

You're simply a big fan of mathjs. Keep up the good work, mathjs rocks 🚀

$6 a month

Select

JSONEditor BIG fan

You're simply a big fan of JSONEditor. Keep up the good work, JSONEditor is awesome 😎

$100 a month

Select

Math.js sponsor

You seriously want to sponsor mathjs. You'll get your logo on the README of the project.