proposal-top-level-await
async-std
proposal-top-level-await | async-std | |
---|---|---|
13 | 19 | |
1,005 | 3,837 | |
- | 0.6% | |
7.0 | 5.3 | |
almost 3 years ago | 3 months ago | |
HTML | Rust | |
Apache License 2.0 | Apache License 2.0 |
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proposal-top-level-await
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Unveiling Breakthroughs Found In The State Of JS 2022 Survey
For more info about this feature, you can refer to the official proposal repo.
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Write program in assembly, decompile to TypeScript, convert to JavaScript, run in Node
This one is Stage 4 (complete)
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Open Source Adventures: Episode 29: Using D3 with old school tooling to visualize Russian Tank Losses
But browsers don't support top-level await yet. So we need to put it all inside as async function.
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Configuring CommonJS & ES Modules for Node.js
Note that ESM is not “backwards” compatible with CJS: a CJS module cannot require() an ES Module; it is possible to use a dynamic import (await import()), but this is likely not what consumers expect (and, unlike ESM, CJS does not support Top-Level Await).
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ES2022 Preview: 10 Exciting JavaScript Language Features From 2021
top-level await feature for ES modules
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How to save fetch JSON result to global variable?
That said, ES2022 does introduce a top-level await that works in the top level scope, but only in modules, not global scope. So if in a module this could work:
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Node v14.8+: Top Level Async Await
With the latest node version(s) (v14.8+), we should be able to rewrite the above code to something like this. proposal-top-level-await
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What is a practical example of using a Promise? These Youtube tutorials are bogus
Now a days, you'll likely mostly use async/await. The few cases where you'll need the Promise API (then()'s etc.) is when you're outside of an async function. With the new top-level await feature coming to modules, you wouldn't even need it outside of async functions in module code which will make its usage even less common.
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Basic import question
The await is in top level. The top level await proposal is in stage 3. Currently, the browser support is also not good enough but should work in latest version of the google chrome browser.
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Rust's async isn't f#@king colored!
There is a proposal for top-level await in JS. I'm guessing this would effectively kinda do the same thing? Or am I wrong there?
async-std
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Stabilizing async fn in traits in 2023 | Inside Rust Blog
But maybe check out the discussion here https://github.com/async-rs/async-std/pull/631 or something (the blog post was linked on the end of it)
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Anyone using io_uring?
Have a look at these: https://github.com/async-rs/async-std/tree/main/examples
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Any plans for built-in support of Vec2/Vec3/Vec4 in Rust?
In fact, there are a lot of crates in Rust where in other programming languages, it would be included in the standard library. Examples are regex, random number generators, additional iterator methods, macros for other collections, num traits, loggers, HTTP libraries, error handling, async runtimes, serialization and deserialization, date and time, and many more.
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18 factors powering the Rust revolution, Part 2 of 3
Two major projects (non std lib but extremely commonly used) stand out in the area of async programming: Async std and Tokio - no doubt familiar to anyone that has turned an eye towards Rust for a second too long. Async architecture in general is likely very familiar to JavaScript programmers but in Rust there are some extra considerations (like ownership of the data that is thrown into an async function). Tokio is fast becoming a heavily supported and road tested async framework, with a thread scheduling runtime "baked in" that has learned from the history of Go, Erlang, and Java thread schedulers.
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What are the side-effects of using different runtimes in the same codebase?
Ah... https://github.com/tokio-rs/tokio and https://github.com/async-rs/async-std ?
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Hey Rustaceans! Got an easy question? Ask here (51/2021)!
async-std: Basically a Tokio alternative with a few different design decisions.
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Why asynchronous Rust doesn't work
Go's solution is for the scheduler to notice after a while when a goroutine has blocked execution and to shift goroutines waiting their turn to another thread. async-std pondered a similar approach with tasks, but it proved controversial and was never merged.
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Building static Rust binaries for Linux
This indicates curl, zlib, openssl, and libnghttp2 as well as a bunch of WASM-related things are being dynamically linked into my executable. To resolve this, I looked at the build features exposed by surf and found that it selects the "curl_client" feature by default, which can be turned off and replaced with "h1-client-rustls" which uses an HTTP client backed by rustls and async-std and no dynamically linked libraries. Enabling this build feature removed all -sys dependencies from androidx-release-watcher, allowing me to build static executables of it.
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Rust async is colored, and that’s not a big deal
And also, the actual PR never got merged.
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Rust's async isn't f#@king colored!
Async in rust needs a runtime (aka executor) to run. You can maybe get a better description from the rust docs. As an example, Tokio attempts to provide an interface for a developer that is minimal change to the more common blocking code. So you'd end up putting #[tokio::main] above your main function to spin up the executor and most of the rest of the code is similar to a non-async version with a few sprinkles of .await, which you can see in the hello world for tokio. In contrast, async-std provides a more hands-on/low-level approach. If you are unlucky enough to have libraries that choose different stacks to work on, you'll possibly (probably?) have to handle both.
What are some alternatives?
esbuild - An extremely fast bundler for the web
tokio - A runtime for writing reliable asynchronous applications with Rust. Provides I/O, networking, scheduling, timers, ...
Rollup - Next-generation ES module bundler
actix-web - Actix Web is a powerful, pragmatic, and extremely fast web framework for Rust.
rust-async-bench - The cost of Rust async/await
smol - A small and fast async runtime for Rust
regexp-match-indices - Polyfill for the RegExp Match Indices proposal
futures-rs - Zero-cost asynchronous programming in Rust
webpack - A bundler for javascript and friends. Packs many modules into a few bundled assets. Code Splitting allows for loading parts of the application on demand. Through "loaders", modules can be CommonJs, AMD, ES6 modules, CSS, Images, JSON, Coffeescript, LESS, ... and your custom stuff.
reqwest - An easy and powerful Rust HTTP Client
zx - A tool for writing better scripts
embassy - Modern embedded framework, using Rust and async.