Learn TINYGO-WASM with Real Code Examples

TinyGo compiles Go code into highly optimized WebAssembly modules.

Reduces binary size drastically compared to the standard Go compiler.

Targets browsers, WASI runtimes, embedded boards, and microcontrollers.

Optimized for low memory, low-power, and real-time environments.

Makes it possible to write Go applications that run safely inside Wasm sandboxes.

Compiles Go -> WebAssembly efficiently

Supports Web APIs via WebAssembly syscalls

Works with WASI imports/exports

Supports coroutines and async-style goroutines

Cross-compilation for many Wasm targets

Wasm module -> compiled Go program

Imports/exports -> functions exposed to JS or host runtime

WASI -> standard system interface

emscripten-like APIs replaced by TinyGo shims

JS bridge used for DOM/Web APIs

main.go - application entry point

go.mod - module metadata

build.sh / Makefile - build scripts

dist/ - output .wasm files

examples/ - sample TinyGo Wasm code

Write Go code using TinyGo-supported subset

Compile to Wasm with TinyGo

Bind to JavaScript or WASI runtime

Test in browser or host environment

Optimize via wasm-opt if needed

Beginner: print output via WASI

Intermediate: browser DOM manipulation through JS bindings

Advanced: interactive graphics or audio processing

Expert: IoT firmware targeting Wasm

Auditor: performance profiling of Wasm modules

TinyGo vs Standard Go (wasm): much smaller and faster binaries

TinyGo vs Rust/Wasm: easier syntax, slightly less performance

TinyGo vs AssemblyScript: more mature language, bigger binary

TinyGo vs C/C++ Emscripten: simpler toolchain, less low-level

TinyGo vs Zig Wasm: similar size, Go is higher-level

2018 – TinyGo initial release

2019 – WebAssembly support stabilized

2020 – WASI and browser enhancements

2021 – Coroutine-based goroutines

2022–2025 – Heavy optimization, stdlib improvements & edge runtime adoption

TinyGo - lightweight Go compiler

WASI - WebAssembly System Interface

syscall/js - JS <-> Go interop package

wasm32 - 32-bit Wasm architecture

wasm-opt - WebAssembly optimizer