Knockoutjs context debugger
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This extension is no longer available in the official store. Delisted on 2025-09-15.
Extension Actions
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Shows the knockout context & data for the selected dom node in a sidebar of the elements pane.
Product features and usage:
- Extension supports developers to easily debugger value variables when using the "KnockoutJs" library for their html files. With the form showing the removal & data context for the selected dom button in the sidebar of the element pane.
- Knockoutjs debugging extension.
+ Adds an additional sidebar in the element pane of chrome dev tools with knockout context and relevant data for the selected element. Very useful if you have large/nested views.
+ Very usefull if you got large/nested viewmodels.
+ Allows adding traces to everything observable/computable.
+ Allows editing of observables from the dashboard.
So to use the extension, the user's html file must download and use the KnockoutJS library (knockoutjs.com).
MIT license.
Tip (based on comments)
You can view the content of any observable in the viewmodel in the '$root_toJS' variable.
------ Change Log -------
Version-2.6.7: Add "Library Knockout Js" sharing feature to social networks: Twitter, LinkedIn and quickly share links to newsfeed facebook using post api.
Latest reviews
- Gearoid Joyce
- Currently this breaks dev tools when running, has to disable it to get the debugger to start running again.
- Nic Newdigate
- Unfortunately this doesn't work at all!
- Taras Kovryzhenko
- Works only in old versions of chromium-based browsers. I set up Opera 76 and debug there
- Shiva ora
- this knockout context debugger stopped showing knock out variable in elements tab after i updated chrome can anyone help me out.
- Patrick Weiß
- chrome >v.92 workaround: Create a live expression in your console and take this: if (window.last$0 !== $0) { window.last$0 = $0; console.log('\n\n-------------- Knockout $data ------------\n', 'element:', $0, '\n data:', ko.toJS(ko.dataFor($0)),'\n context:', ko.contextFor($0));}
- Deepak Kumar
- No longer working on Chrome. Workaround : use firefox plugin. https://addons.mozilla.org/en-US/firefox/addon/knockoutjs-context/
- Vasiliy Smoliar
- Doesn't work any more in latest chrom.
- Tiger Darling
- Doesn't work any more in latest chrom.
- Byns Ru
- Не работает в 92 версии хрома
- Josh Bourke
- Doesn't work anymore with latest Chrome
- uiqman
- Does not work as per latest chrome update
- Anurag kurmi
- not working in latest chrome update.
- Gustavo Serão
- Its not working with new versions of chrome!
- Huân Trương
- some time it error when click to knockout context, it nothings
- Kiran Kumar
- Stopped working after updating the Chrome version to 92.0.4515.107 (Official Build) (64-bit)
- moon plant
- No data are showing on the Knockout out debugger screen as of today.
- Griffork
- Can't write Knockout without it! WARNING: Make sure you don't enable tracing, it will cause the entire page to lag and then freeze on bigger projects. It's also recommended to turn off serialisation to reduce memory usage (by clicking on the extension's icon in the top-right of chrome and then clicking options).
- Vivek Pandey
- Fantastic
- Stephane Berube
- broken in 2020
- Ron McCranie
- Doesn't work. Either that, or it's extremely confusing to get it to work. Looking for something easy.
- Mohammed Farhadur Rahman
- I've been using this extension for a couple years now. I think it's essential for Magento front end development where KO is used.
- Attila Tóth
- I used to rely on it, but it's not working for me with 3.5.0 RC2.
- Daniel Clarke
- Good for checking on knockout contexts in dev tools, but my god, it becomes slow as treacle even on the smallest of views, will remove from chrome now. would recommend if in a real bind, would not recommend for day to day use.
- Ben Ashley - JLUK
- Does what it says but limited filtering options for suggestions vs issues.
- Pippa
- cant live without this
- Krunal Parmar
- Not able to see values in Knockout Context panel. Can only see observables only No way to dig into obesrvable.
- MrOnosa
- I'm going to parrot what Andy Hawkins said two years ago: !!! If you experience slowness when debugging in the elements tab !!! Go to extensions and then options and turn off the first checkbox for serialization. This will fix the issue.
- Steve Ottenad
- Its a valuable tool, but only because there are none else like it. There is a memory leak or something that routinely crashes my tab.
- Andrew Hood
- Invaluable tool for doing coding with KOjs. Thanks a bundle.
- Paul Hoke
- Great tool. I don't know how I could do my job without it.
- David R. Noel
- Necessary for development in any Knockout environment.
- MobiusHorizons
- Apparently this no longer functions in recent versions of chrome. I was unable to get it to show up.
- Chris Hawkes
- doesn't work
- Nomadic Soul
- awesome
- Yaniv Abo
- Grate Tool
- Michael Broussard
- Works great
- Albert Puig
- Está muy bien para proyectos simples. Con iframes no funciona.
- Jean-Sebastien Binette
- So far so good. THANK YOU!!
- Michael Pavlak
- Must have tool when developing a Knockout application. I have worked on several applications of decent size and never ran into any performance issues noted by others. I imagine that if you have performance issues, your models are probably insane. :)
- Dave Lee
- Very good,thanks
- Dirk Reuschling
- It's good to see whats in the model, but it breaks the Chrome process with a "Ah Snap" message when I check the properties of a specific html element.
- Karmjit Singh
- Awesome, must have for each knockout developer
- Puneet Bhasin
- This is invaluable tool for knockout. A must have!
- Giovanni Quarella
- Good