webassembly | minimal toolkit and runtime to produce and run | Binary Executable Format library
kandi X-RAY | webassembly Summary
kandi X-RAY | webassembly Summary
An experimental, minimal toolkit and runtime on top of node to produce and run WebAssembly modules. To run compiled WebAssembly modules, you'll either need a recent version of your browser with WebAssembly enabled or node.js 8 - but you probably already know that. For development, node.js 6 upwards is sufficient.
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Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of webassembly
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webassembly Examples and Code Snippets
Lines of Code : 78License : Strong Copyleft (CC BY-SA 4.0)
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$(ADDITIONAL_CSS)
$(ADDITIONAL_HEAD)
This application requ
{
"Google": {
"Authority": "https://accounts.google.com/",
"ClientId": "11111111111-11111111111111111111111111111111.apps.googleusercontent.com",
"DefaultScopes": [ "email" ], // The Blazor WebAssembly template automatically using System;
namespace MyAppName.Services
{
public delegate void MyEventHandler();
public class MyService
{
public event MyEventHandler MyEvent;
public string CircleClass = "danger";
public void Chan(module
(func $i (import "imports" "imported_func") (param i32))
(func (export "exported_func")
i32.const 42
call $i
)
)
0x00, 0x61, 0x73, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x01, 0x08, 0x02, 0x60,
0x0Community Discussions
Trending Discussions on webassembly
QUESTION
I have some rust code that compiles to web assembly using wasm-pack and wasm-bindgen. I want to call into this code from a web worklet/worker. The entire app should eventually be just one single *.js file, with everything else inlined.
This is what I imagine my build process to look like:
- Use
wasm-packto compile the rust code to *.wasm and *.js bindings (this step works just fine) - Use
webpackto build a self-contained *.js file that I can load as a worklet/worker. The *.wasm must be included in this file. (this step fails) - Use
webpackagain to build my final app/package, inlining the worklet/worker file from step 2. (this step works just fine)
My problem is in step 2: I can't make webpack inline the *.wasm into the worklet/worker file.
I tried this in my webpack config:
ANSWER
Answered 2022-Mar-30 at 07:38- Build the wasm itself:
cargo build --target=wasm32/unknown/unknown - Build the JS-bindings:
wasm-bindgen --out-dir=dist --target=web --omit-default-module-path my-wasm-package.wasm. - Consume the wasm in your worklet script like this:
QUESTION
I would like to be able to robustly stop a video when the video arrives on some specified frames in order to do oral presentations based on videos made with Blender, Manim...
I'm aware of this question, but the problem is that the video does not stops exactly at the good frame. Sometimes it continues forward for one frame and when I force it to come back to the initial frame we see the video going backward, which is weird. Even worse, if the next frame is completely different (different background...) this will be very visible.
To illustrate my issues, I created a demo project here (just click "next" and see that when the video stops, sometimes it goes backward). The full code is here.
The important part of the code I'm using is:
...ANSWER
Answered 2022-Jan-21 at 19:18The video has frame rate of 25fps, and not 24fps:
After putting the correct value it works ok: demo
The VideoFrame api heavily relies on FPS provided by you. You can find FPS of your videos offline and send as metadata along with stop frames from server.
The site videoplayer.handmadeproductions.de uses window.requestAnimationFrame() to get the callback.
There is a new better alternative to requestAnimationFrame. The requestVideoFrameCallback(), allows us to do per-video-frame operations on video.
The same functionality, you domed in OP, can be achieved like this:
QUESTION
Hey @all I was playing with WebAssembly Studio and created an empty Rust project.
In my Rust code, I'm returning the pointer and the length for my "Hello World" string. Compiling worked fine, but I was expecting the resulting WASM to have a function returning two i32. But I found a function taking one i32 and returning nothing.
Why is the function not having the signature fn () -> (i32,i32) ?
How am I supposed to extract the two values from the WASM module? (Using Rust-wasmtime)
Below you can find the code snippets I'm talking about. Thanks in advance!
...ANSWER
Answered 2022-Jan-18 at 09:48WebAssembly got the ability to return multiple values just recently. The compiler used doesn't seem to support this yet or doesn't use it for compatibility reasons, i.e. for runtimes that don't know this feature yet.
Therefore, the compiler rewrites the code as follows:
QUESTION
Followed Dynamically set the culture from the Accept-Language header to localize my blazor wasm app.
WebUI.csproj
...ANSWER
Answered 2022-Jan-06 at 10:47You only specified an English localization file: Shared.en.resx.
When you specify @loc["countries"] in the component, it attempts to use the browser locale to translate the text "countries".
The localizer looks for a resource file Shared.de.resx but that doesn't exist, so it defaults to the base translation, in this case English.
QUESTION
I'm looking to do some in-browser video work using good-ol' FFmpeg and Rust. Simple examples, where the caller is interacting with the ffmpeg command-line abound. More complex examples are harder to find. In my case I wish to extract, process and rotate discrete frames.
Clipchamp makes impressive use of WASM and FFmpeg, however the downloaded WASM file (there's only one) will not reveal itself to wasm-nm nor wasm-decompile, both complaining about the same opcode:
- wasm-nm:
Unknown opcode 253 - wasm-decompile:
unexpected opcode: 0xfd 0x0
Has anyone wisdom to share on how I can (1) introspect the WASM module in use or (2) more generally advise on how I can (using WASM and Rust, most likely) work with video files?
...ANSWER
Answered 2021-Dec-25 at 14:45The WASM module uses SIMD instructions (prefixed with 0xfd, and also known as vector instructions), which were merged into the spec just last month. The latest release of wasm-decompile therefore doesn't have these enabled by default yet, but will in the next release. Meanwhile, you can enable them manually with the --enable-simd command line option. This invocation works for me with the latest release:
QUESTION
For testing purpose, I would like to 'catch' any error occuring in my app and displaying it on the page (not in the console). For that purpose I discovered the ErrorBoundary component in the .Net 6 framework.
ErrorBoundaries doc from Microsoft
At first, I successfully tested this component inside a Bazor WebAssembly project.
Steps:
- Create a newBlazor WebAssembly project
- Create the component CustomErrorBoundary.razor (see code below)
- In MainLayout.razor surround the @Body instruction with the component CustomErrorBoundary
- In FetchData.razor throw an exception in the code (see below)
CustomErrorBoundary
...ANSWER
Answered 2021-Dec-07 at 14:22Trying to decipher the error, on first look, it seems that the type ErrorBoudary that you inherit needs a dependency that is not injected in your MAUI project.
I have found a post that seems to explain your issue Githubmemory on this issue Basically, you need to implement the interface and then register that new class as an available service.
I would guess the Blazor Wasm implements this by default?
QUESTION
The C source of my wasm module has to use global variables because it's using code that's common to the server which does so. But I get:
...ANSWER
Answered 2021-Oct-10 at 21:23I don't have this software installed, but it seems that you have to remove the -s SIDE_MODULE flag, and instead of -o daft.wasm use -o daft.html. According to this the extension .wasm generates only .wasm file (as when -s STANDALONE_WASM is used). But you will need more.
The problem is that at this time the WebAssembly needs JavaScript glue code to "make it work". When you use -o draf.html you will get .html, .js and .wasm files (so care not to overwrite some of your files). In your case that is a linking error. Check this for a very simple example.
For short you should use just this emcc daft.c -s WASM=1 -o daft.html.
QUESTION
I updated my Asp.net core Blazor WebAssembly app to .net 6. Everything is fine, but the deploy from github actions doesn't work and throws this error:
...ANSWER
Answered 2021-Nov-15 at 05:26On Linux, it's important that any bash deployment scripts that get run have Unix line endings (LF) and not Windows line endings (CRLF).
Kuduscript will generate scripts with platform-appropriate line endings, but if those scripts are modified, or if you provide your own custom deployment scripts, it's important to make sure that your editor doesn't change the line endings.
If something seems off with your deployment script, you can always use the Kudu console to delete the contents of /home/site/deployments/tools.
This is the directory where Kudu caches kuduscript-generated deployment scripts. On the next deployment, the script will be regenerated.
The error you're currently seeing is a Kudu issue with running node/npm for deployments.
The easiest and fastest resolution for what you are currently seeing is to specify engines.node in your package.json.
Error: EISDIR: illegal operation on a directory, open '/home/site/wwwroot/wwwroot/Identity/lib/bootstrap/LICENSE'
EISDIR stands for "Error, Is Directory". This means that NPM is trying to do something to a file but it is a directory. In your case, NPM is trying to "read" a file which is a directory. Since the operation cannot be done the error is thrown.
Three things to make sure here
- Make sure the file exists. If it does not, you need to create it. (If NPM depends on any specific information in the file, you will need to have that information there).
- Make sure it is in fact a file and not a directory.
- It has the right permissions. You can change the file to have all permissions with "sudo chmod 777 FILE_NAME".
Note: You are giving Read, Write and Execute permissions to every one on that file.
QUESTION
How does Task.Yield work under the hood in Mono/WASM runtime (which is used by Blazor WebAssembly)?
To clarify, I believe I have a good understanding of how Task.Yield works in .NET Framework and .NET Core. Mono implementation doesn't look much different, in a nutshell, it comes down to this:
ANSWER
Answered 2021-Nov-28 at 11:17It’s setTimeout. There is considerable indirection between that and QueueUserWorkItem, but this is where it bottoms out.
Most of the WebAssembly-specific machinery can be seen in PR 38029. The WebAssembly implementation of RequestWorkerThread calls a private method named QueueCallback, which is implemented in C code as mono_wasm_queue_tp_cb. This in invokes mono_threads_schedule_background_job, which in turn calls schedule_background_exec, which is implemented in TypeScript as:
QUESTION
I'm new to Rust and WASM and struggling to get a first program running.
...ANSWER
Answered 2021-Nov-23 at 12:35When using WebInstantiate in node without more boilerplate, just like you did, I got the same result (undefined). What works seamlessly in the browser doesn't work so well in node.
But I got string exchange working when specifically building a node module with
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