wazero

Files

Takeshi Yoneda b68ee641cc ci: update TinyGo to 0.27 (#1120 )

Signed-off-by: Takeshi Yoneda <takeshi@tetrate.io>

2023-02-13 17:38:53 +09:00

testdata

ci: update TinyGo to 0.27 (#1120 )

2023-02-13 17:38:53 +09:00

add_test.go

Redirects users to tested example (#791 )

2022-09-01 09:12:37 +08:00

add.go

examples/basic: parse positional arguments with flags (#1028 )

2023-01-14 07:07:26 +08:00

README.md

Stops using "ex." to abbreviate "for example" (#827 )

2022-10-24 11:51:48 +09:00

README.md

Basic example

This example shows how to extend a Go application with an addition function defined in WebAssembly.

$ go run add.go 7 9
7 + 9 = 16

Compilation

wazero is a WebAssembly runtime, embedded in your host application. To run WebAssembly functions, you need access to a WebAssembly Binary (Wasm), typically a %.wasm file.

add.wasm was compiled from add.go with TinyGo, as it is the most common way to compile Go source to Wasm. Here's the minimal command to build a %.wasm binary.

cd testdata; tinygo build -o add.wasm -target=wasi add.go

Notes

Many other languages compile to (target) Wasm including AssemblyScript, C, C++, Rust, and Zig!
The embedding application is often called the "host" in WebAssembly.
The Wasm binary is often called the "guest" in WebAssembly. Sometimes they need imports to implement features such as console output. TinyGo's wasi target, requires WASI imports.