Dev tools · alternatives · 2026

Behave.js is a developer tool that adds coding behaviors to textarea elements. It provides features like syntax highlighting, code formatting, and intelligent editing capabilities for text areas used in web… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Behave.js – Coding Behaviors for textarea elements launched in 2013; newer entries below may have overtaken it.

1. 1
   Editor.js▲723

   A block-styled editor with clean JSON output

   2019 · editorjs.io · its alternatives →

2. 2JL
   jsdares – learning programming visually▲177

   Experimental educational programming environment. Learn Javascript and create your own dares!

   2013 · jsdares.com · its alternatives →

3. 3
   CSSeffectsSnippets.▲292

   A collection of CSS effects with a click to copy.

   2019 · emilkowalski.github.io · its alternatives →

4. 4
   Blotter.js▲243

   A JavaScript API for unconventional text effects on the web.

   2018 · blotter.js.org · its alternatives →

5. 5
   Pts.js – A library for visualization and creative coding▲611

   Pts is a javascript library for visualization and creative-coding.

   2018 · ptsjs.org · its alternatives →

6. 6WP
   Weekend project, Intro.js▲716

   2013 · usablica.github.com · its alternatives →

7. 7
   Driver.js▲446

   A lightweight engine to drive user's focus across the page

   2018 · kamran.fyi · its alternatives →

8. 8SJ
   Scratch.js – Interactive JavaScript Scratchpad▲169

   2020 · hole.dev · its alternatives →

9. 9
   Brutal.js – a small framework for building brutalist web applications▲62

   2018 · github.com · its alternatives →

10. 10
    Grumbles.js – Detects when your users swear out loud▲91

    With Ken Powers Comes Ken Responsibility

    2016 · knpw.rs · its alternatives →

11. 11
    JSX.Design▲413

    The dev friendly no-code editor for React development

    2024 · its alternatives →

12. 12PJ
    Phantom JS interactive editor▲120

    2014 · phantomjs-pad.ozaur.com · its alternatives →

13. 13WJ
    Wiv.js – A library for a more wiggly div▲265

    2018 · jjkaufman.github.io · its alternatives →

14. 14
    Tiny jQuery alternative with inline Locality of Behavior▲30

    🗿 Mini jQuery alternative. Dependency-free animations. Locality of Behavior. Use one element or arrays transparently. Pairs with htmx. Vanilla querySelector() but better! - gnat/surreal

    2023 · github.com · its alternatives →

15. 15WA
    WideArea – an expandable textarea▲192

    Create expandable textarea and write large amount of text easily

    2013 · usablica.github.io · its alternatives →

16. 16KJ
    Kerning.js — Take control of your web typography▲154

    2011 · endtwist.github.com · its alternatives →

17. 17
    Lax.js▲343

    Create beautiful & smooth animations when you scroll

    2019 · github.com · its alternatives →

18. 18
    Intro.js v2.0▲328

    Javascript framework for adding guide and screen tips

    2015 · usablica.github.io · its alternatives →

19. 19BJ
    Bounce.js – A tool for generating CSS3 animations▲172

    2014 · bouncejs.com · its alternatives →

20. 20
    Chart.js▲263

    Simple, clean & engaging charts for designers and developers

    2014 · chartjs.org · its alternatives →

21. 21
    CodeSwing – A CodePen-like interactive playground, built into VS Code▲159

    VS Code extension for building web applications ("swings") using a interactive and editor-integrated coding environment - lostintangent/codeswing

    2020 · github.com · its alternatives →

22. 22
    uFuzzy.js – A tiny, efficient fuzzy search that doesn't suck▲251

    Hello HN! I became frustrated with the unpredictible/poor match quality and opaqueness of "relevance scores" in existing fuzzy and fulltext search libs, so I tried something different and this is the result. The main selling point is the result quality / ordering, with best-in-class memory overhead and excellent performance being bonuses. The API is pretty stable at this point, but looking for feedback before committing to 1.0. TL;DR The test corpus is a 4MB json file with 162k words/phrases, so give it a second for initial download. You can also drag/drop your own…

    2022 · github.com · its alternatives →

23. 23CJ
    Codeblock.js - Editable, runnable javascript code blocks▲50

    2013 · filepicker.github.io · its alternatives →

24. 24
    An experimental data-flow analysis tool for JavaScript▲95

    Find the origin of any character in the DOM

    2019 · fromjs.com · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →