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It’s 32 bit, meaning that we can allocate a maximum of 4Gb of RAM for our WebAssembly application (until WASM64 comes around).
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The reference implementations and the most mature WebAssembly development pipeline called Bynarien is still built around C/C++, mainly because the amount of useful code people want to run in the browser was built with C/C++. The Rust community is building it’s own WebAssembly pipeline, however it’s in a state of Tier 2 without Host Tooling at the beginning of 2025. This means that while it is easily and safely used by developers even for production purposes, it lacks some native tooling. This is where we will rely on the Bynarien toolbox to patch in the holes where the Rust WASM pipeline is lacking.
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It’s clear WebAssembly is one of the more popular up-and-coming technologies out there. Its promise, a universal executable format, is not new. In fact it dates back to 1995 (almost thirty years ago!) with Java. Arguably, Java was successful in some areas, many enterprise software is built on Java after all, it tried for a brief time (Java Web Start) and eventually failed to ride the stellar rise of the world wide web. Microsoft .NET is a younger contender, but it arguably suffering from the same adoption challenge as Java. While it can run on most systems now, the web is still not one of them.
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> cd wasm-on-web > yarn install > cargo generate \ --init \ --name wasm-on-web \ --overwrite \ --git https://github.com/rustwasm/wasm-pack-template
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Start a new TypeScript project called ‘wasm-on-web’ with Vite (or your framework of choice, if any)
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> git clone https://github.com/zebp/wasi-example-swc
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Note: This guide heavily relies on the excellent Rust WASM Book, which contain a lot more examples and details than this article. I recommend checking it out after finishing this one.
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