@webassemblyjs/helper-wasm-bytecode

What is @webassemblyjs/helper-wasm-bytecode?

The @webassemblyjs/helper-wasm-bytecode package is part of the WebAssemblyJS project, which provides tools for compiling, decompiling, and manipulating WebAssembly (Wasm) binaries. This specific package offers utilities for dealing with Wasm bytecode, such as parsing and generating bytecode.

What are @webassemblyjs/helper-wasm-bytecode's main functionalities?

Parsing Wasm Bytecode

This feature allows you to parse WebAssembly bytecode into a more readable and manipulable abstract syntax tree (AST) format. The code sample demonstrates how to read a Wasm file from the filesystem, parse it into an AST using the decode function, and then log the AST to the console.

"use strict";\nconst { decode } = require('@webassemblyjs/wasm-parser');\nconst fs = require('fs');\n\nconst wasmBuffer = fs.readFileSync('path/to/your.wasm');\nconst ast = decode(wasmBuffer);\nconsole.log(ast);

Generating Wasm Bytecode

This feature enables the generation of WebAssembly bytecode from an AST. The code sample shows how to read a Wasm file, parse it into an AST, generate new bytecode from the AST using the encode function, and then write the new bytecode to a file.

"use strict";\nconst { encode } = require('@webassemblyjs/wasm-gen');\nconst fs = require('fs');\nconst { decode } = require('@webassemblyjs/wasm-parser');\n\nconst wasmBuffer = fs.readFileSync('path/to/your.wasm');\nconst ast = decode(wasmBuffer);\nconst newWasmBuffer = encode(ast);\nfs.writeFileSync('path/to/output.wasm', newWasmBuffer);

Other packages similar to @webassemblyjs/helper-wasm-bytecode

wabt

The wabt package is a Node.js binding to the WebAssembly Binary Toolkit. It provides a set of utilities for working with WebAssembly binaries, including parsing, validation, and conversion between Wasm and WAT (WebAssembly Text Format). Compared to @webassemblyjs/helper-wasm-bytecode, wabt offers a broader set of tools directly tied to the official WABT toolkit, making it more comprehensive for certain tasks.

assemblyscript

AssemblyScript compiles a strict subset of TypeScript to WebAssembly. While not a direct alternative for manipulating Wasm bytecode, AssemblyScript is relevant for developers looking to write high-level code that compiles down to WebAssembly. In contrast, @webassemblyjs/helper-wasm-bytecode is more focused on the manipulation of existing Wasm binaries.

README

The README file is missing