/Wiki/sources/honojs__hono/2026/https-hono-dev-llms-full-txt-webassembly-w-wasi-f9d8dc9ac54c-webassembly-w-wasi-s0444-c0000.md

WebAssembly (w/ WASI) (1) - hono-docs

WebAssembly (w/ WASI) (1) Source evidence: /Sources/raw/honojs hono/honojs hono.md Canonical citation: https://hono.dev/llms full.txt webassembly w wasi Summ...

WebAssembly (w/ WASI) (1)

Source evidence: /Sources/raw/honojshono/honojshono.md Canonical citation: https://hono.dev/llms-full.txt#webassembly-w-wasi

Summary

[WebAssembly][wasm-core] is a secure, sandboxed, portable runtime that runs inside and outside web browsers. In practice: - Languages (like JavaScript) compile to WebAssembly (.wasm files) - WebAssembly runtimes (like [wasmtime][wa...

Content

[WebAssembly][wasm-core] is a secure, sandboxed, portable runtime that runs inside and outside web browsers.

In practice:

  • Languages (like JavaScript) compile to WebAssembly (.wasm files)
  • WebAssembly runtimes (like [wasmtime][wasmtime] or [jco][jco]) enable running WebAssembly binaries

While core WebAssembly has no access to things like the local filesystem or sockets, the [WebAssembly System Interface][wasi] steps in to enable defining a platform under WebAssembly workloads.

This means that with WASI, WebAssembly can operate on files, sockets, and much more.

::: info Want to peek at the WASI interface yourself? Check out [wasi:http][wasi-http] :::

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