HackerReposA FIELD GUIDE TO OPEN SOURCE
ProSponsor the shelf♧ 0
← Back to top all-time
Moddable-OpenSource
moddable
C2018–2026
Moddable-OpenSource / moddable

moddable

Tools for developers to create truly open IoT products using standard JavaScript on low cost microcontrollers.

Web DevelopmentDeveloper ToolsHardware & EmbeddedRobotics & IoT
Explore on GitHubRead Hacker News discussions
13Distinct people
25Mentions
0Explicit recommenders
1.6KGitHub stars
REPOSITORY AT A GLANCE

What to know before exploring

What it is

Tools for developers to create truly open IoT products using standard JavaScript on low cost microcontrollers.

GitHub

Where it is used

No documented product use has been verified yet.

What people are saying

No recommendation phrase was found in the indexed comments.

No classified warning is attached to this page. Read the discussions before treating silence as approval.

Also in these discussions

No other repository is repeatedly linked in the same discussions.

This week on Hacker News

Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 6:01:08 PM UTC.

No direct repository links were found in the indexed HN discussions over the past seven days. Older discussions are available below.

Mentions over time

HN mentions by year25 dated mentions

Observed mentions: 2018-04-20 20:25:44 UTC to 2026-05-17 19:16:11 UTC.

024682018-01-01 00:00:00 UTC to 2019-01-01 00:00:00 UTC (exclusive): 8 mentions; 0 submissions, 8 comments20182019-01-01 00:00:00 UTC to 2020-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments2020-01-01 00:00:00 UTC to 2021-01-01 00:00:00 UTC (exclusive): 3 mentions; 1 submissions, 2 comments2021-01-01 00:00:00 UTC to 2022-01-01 00:00:00 UTC (exclusive): 2 mentions; 1 submissions, 1 comments2022-01-01 00:00:00 UTC to 2023-01-01 00:00:00 UTC (exclusive): 6 mentions; 3 submissions, 3 comments20222023-01-01 00:00:00 UTC to 2024-01-01 00:00:00 UTC (exclusive): 0 mentions; 0 submissions, 0 comments2024-01-01 00:00:00 UTC to 2025-01-01 00:00:00 UTC (exclusive): 2 mentions; 0 submissions, 2 comments2025-01-01 00:00:00 UTC to 2026-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments2026-01-01 00:00:00 UTC to 2027-01-01 00:00:00 UTC (exclusive): 1 mentions; 0 submissions, 1 comments. Incomplete calendar period.2026*

* An incomplete calendar period is marked with an outlined bar. Its count is not directly comparable with a full period.

Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.

View mention counts and date ranges
UTC ranges include their start and exclude their end. Select a period to filter the source evidence.
PeriodStart (UTC)End (exclusive, UTC)MentionsSubmissionsComments
20182018-01-01 00:00:00 UTC2019-01-01 00:00:00 UTC808
20192019-01-01 00:00:00 UTC2020-01-01 00:00:00 UTC211
20202020-01-01 00:00:00 UTC2021-01-01 00:00:00 UTC312
20212021-01-01 00:00:00 UTC2022-01-01 00:00:00 UTC211
20222022-01-01 00:00:00 UTC2023-01-01 00:00:00 UTC633
20232023-01-01 00:00:00 UTC2024-01-01 00:00:00 UTC000
20242024-01-01 00:00:00 UTC2025-01-01 00:00:00 UTC202
20252025-01-01 00:00:00 UTC2026-01-01 00:00:00 UTC101
2026 (partial)2026-01-01 00:00:00 UTC2027-01-01 00:00:00 UTC101

What Hacker News says

8 sources
phoddie·Apr 21, 2018
We don't have a document that answers your question directly but the capabilities are all there. We're happy to help you get started - post an issue on our repository on GitHub. The "XS in C" describes the API you'll use from your C/C++ code to interact with XS (created a VM, implement native functions callable from JavaScript, etc). Most of the limits can be set using the manifest, which defines the virtual machine build. For example, to limit the memory used by a script or the modules available to a script (e.g. what classes and functions it can call), use the manifest's "creation" object which indicates the maximum number of bytes the VM can allocate. Here's the base manifest all our examples include, which define the VM size in the creation as 32 KB - https://github.com/Moddable-OpenSource/moddable/blob/public/.... The manifest also l
Read the rest
ists all the modules that are built into the virtual machine. These are the only modules a script can use (unless you add a module that can load other modules!). For example, manifest_net.json (https://github.com/Moddable-OpenSource/moddable/blob/public/...) includes a bunch of modules related to networking (socket, sntp, wifi).
In XS7 – A compact JavaScript engine for embedded applications
lprader·Apr 20, 2018
We can run our helloworld sample (https://github.com/Moddable-OpenSource/moddable/tree/public/...) with the xsbug debugger attached in 6000 bytes of RAM on the ESP8266. 5456 bytes for the stack and heaps, 256 for the dynamic symbol table, and 288 for the alias array. With the 26KB RAM Duktape needs for "Hello world" we can run apps like the Sensor hub described in this blog post (run on a Thunderboard that only has 32KB of RAM total): http://blog.moddable.tech/blog/moddable-tech-presentation-to...
In XS7 – A compact JavaScript engine for embedded applications
lprader·Apr 20, 2018
Yes, absolutely. XS just provides the basic built-in JavaScript objects (Date, RegExp, String, Number, etc.). Everything else is up to you (meaning the person who creates the virtual machine). And memory allocation can be static or dynamic, so you can control how much memory is available. In case you're interested, here's the doc that describes the C interface to the runtime of the XS JavaScript engine: https://github.com/Moddable-OpenSource/moddable/blob/public/...
In XS7 – A compact JavaScript engine for embedded applications

MAKE YOURSELF AT HOME

A few shortcuts

/
Search the collection
?
Open this guide
Esc
Close dialogs and navigation

Your saved repositories and interests stay in this browser.