WebAssembly Specification

1. Introduction and overview

   Design goals, concepts and the structure of a WebAssembly module.

2. Structure: types and instructions

   Value types, function types, instructions and module structure.

3. Validation

   Typing rules and validation algorithm.

4. Execution

   Runtime structure: store, stack, instantiation and invocation.

5. Binary format

   Binary encoding of modules, sections and LEB128 integers.

6. Text format

   WAT S-expression text format.

7. JavaScript API

   WebAssembly.Module, Instance, Memory, Table and Global.

8. Web API

   Streaming compilation and instantiation with fetch responses.

9. Appendix

   Embedding interface, implementation limits and custom sections.

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