Learn WAT with Real Code Examples
Updated Nov 25, 2025
Learning Path
Understand Wasm basics
Learn WAT syntax
Use wat2wasm / wasm2wat tools
Write low-level modules
Integrate with JavaScript
Skill Improvement Plan
Week 1: WAT syntax, module structure
Week 2: Instructions & stack machine
Week 3: Memory + tables + imports
Week 4: Host integration & debugging
Week 5: Performance tuning & binary inspection
Interview Questions
What is WAT and why does it exist?
Explain WebAssembly’s stack machine model.
How do you define and export a function in WAT?
What is linear memory in WebAssembly?
How does wat2wasm differ from wasm2wat?
Cheat Sheet
(module ... ) - define module
(func (param i32) (result i32) ... )
(memory 1) - 1 page (64KiB)
i32.load / i32.store - memory ops
export - expose functions
Books
The WebAssembly Specification
WebAssembly: The Definitive Guide
Understanding WebAssembly by Example
Handcrafted WebAssembly
WebAssembly Internals: A Deep Dive
Tutorials
Writing your first WAT module
Memory management in WAT
Import/export patterns
Debugging Wasm using wasm2wat
Building micro-libraries in WAT
Official Docs
https://webassembly.github.io/spec/core/text/
https://webassembly.org/docs/
Community Links
WebAssembly Community Group
WABT GitHub
Mozilla WebAssembly Docs
StackOverflow WebAssembly
WebAssembly Discord
Community Support
W3C WebAssembly Community Group
Mozilla WebAssembly docs
WABT GitHub
StackOverflow Wasm tag
WebAssembly Discord