DBdbrgn·Mar 15, 2019
https://github.com/chinedufn/percy/ already has a virtualdom implementation and a procedural macro for JSX like HTML.
In Fast, Bump-Allocated Virtual Doms with Rust and Wasmchinedufn
percy
Rust2018–2019
chinedufn / percy
percy
Build frontend browser apps with Rust + WebAssembly. Supports server side rendering.
2Distinct people
4Mentions
0Explicit recommenders
2.3KGitHub stars
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What it is
Build frontend browser apps with Rust + WebAssembly. Supports server side rendering.
GitHub
Where it is used
No documented product use has been verified yet.
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This week on Hacker News
Nov 7–Nov 14 UTC · Direct repository links and separately labeled related project stories. Indexed through 11/14/2026, 5:04:57 PM UTC.
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Mentions over time
HN mentions by month4 dated mentions
Observed mentions: 2018-07-26 12:23:59 UTC to 2019-03-15 07:15:00 UTC.
Counts come from the repository’s dated source evidence. Index cutoff: 2026-11-02 08:16:59 UTC.
View mention counts and date ranges
| Period | Start (UTC) | End (exclusive, UTC) | Mentions | Submissions | Comments |
|---|---|---|---|---|---|
| Jul 2018 | 2018-07-01 00:00:00 UTC | 2018-08-01 00:00:00 UTC | 3 | 1 | 2 |
| Aug 2018 | 2018-08-01 00:00:00 UTC | 2018-09-01 00:00:00 UTC | 0 | 0 | 0 |
| Sep 2018 | 2018-09-01 00:00:00 UTC | 2018-10-01 00:00:00 UTC | 0 | 0 | 0 |
| Oct 2018 | 2018-10-01 00:00:00 UTC | 2018-11-01 00:00:00 UTC | 0 | 0 | 0 |
| Nov 2018 | 2018-11-01 00:00:00 UTC | 2018-12-01 00:00:00 UTC | 0 | 0 | 0 |
| Dec 2018 | 2018-12-01 00:00:00 UTC | 2019-01-01 00:00:00 UTC | 0 | 0 | 0 |
| Jan 2019 | 2019-01-01 00:00:00 UTC | 2019-02-01 00:00:00 UTC | 0 | 0 | 0 |
| Feb 2019 | 2019-02-01 00:00:00 UTC | 2019-03-01 00:00:00 UTC | 0 | 0 | 0 |
| Mar 2019 | 2019-03-01 00:00:00 UTC | 2019-04-01 00:00:00 UTC | 1 | 0 | 1 |
What Hacker News says
4 sourcesSure!
The backend is pretty much this (messy) file - https://github.com/chinedufn/percy/blob/master/examples/isom... .
It
1. Pulls in your application crate
2. Initializes your app (more or less sets initial state
3. Renders your app's virtual DOM into an HTML string
4. Serves the HTML to the client, along with the initial state serialized into JSON in a script tag (using serde-json)
5.Also serves the WASM script and the JS that initializes the WASM
So that's your server crate. Then your client crate also pulls in your same application crate and you compile it to WebAssembly and that's what runs browser side.
Feel free to let me know if any of that was poorly explained!
In Show HN: Percy – A Rust and WebAssembly isomorphic virtual DOM implementationAs in an example app?
If you don't need server side rendering you can have one Rust file but you also need a JS file to initialize the WebAssembly module. So just one file isn't reasonably possible.
For a server side rendered app you need to have a cargo workspace with 3 crates (they can be in the same repo so not a huge deal).
One crate is a `cdylib` that you compile to WebAssembly to serve your app to the client. This is a light wrapper around your actual application.
One crate is your actual application.
And one crate is your server, which is also a light wrapper around your actual application.
That server side rendering structure can be found here - https://github.com/chinedufn/percy/tree/master/examples/isom...
But in terms of a super minimal example without server side rendering.. I'll be working on adding one (along with updating t
Read the rest
he current example)!
Show HN: Percy – A Rust and WebAssembly isomorphic virtual DOM implementation
234 points · Open discussion