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@webassemblyjs/wasm-edit (1.14.1)

Published 2026-02-24 13:52:22 +00:00 by atheaadmin

Installation

Setup this registry in your project .npmrc file:

@webassemblyjs:registry=

To install the package using npm, run the following command:

npm install @webassemblyjs/wasm-edit@1.14.1

or add it to the package.json file:

"@webassemblyjs/wasm-edit": "1.14.1"

For more information on the npm registry, see the documentation.

About this package

@webassemblyjs/wasm-edit

Rewrite a WASM binary

Replace in-place an AST node in the binary.

Installation

yarn add @webassemblyjs/wasm-edit

Usage

Update:

import { edit } from "@webassemblyjs/wasm-edit";

const binary = [/*...*/];

const visitors = {
  ModuleImport({ node }) {
    node.module = "foo";
    node.name = "bar";
  }
};

const newBinary = edit(binary, visitors);

Replace:

import { edit } from "@webassemblyjs/wasm-edit";

const binary = [/*...*/];

const visitors = {
  Instr(path) {
    const newNode = t.callInstruction(t.indexLiteral(0));
    path.replaceWith(newNode);
  }
};

const newBinary = edit(binary, visitors);

Remove:

import { edit } from "@webassemblyjs/wasm-edit";

const binary = [/*...*/];

const visitors = {
  ModuleExport({ node }) {
    path.remove()
  }
};

const newBinary = edit(binary, visitors);

Insert:

import { add } from "@webassemblyjs/wasm-edit";

const binary = [/*...*/];

const newBinary = add(actualBinary, [
  t.moduleImport("env", "mem", t.memory(t.limit(1)))
]);

Providing the AST

Providing an AST allows you to handle the decoding yourself, here is the API:

addWithAST(Program, ArrayBuffer, Array<Node>): ArrayBuffer;
editWithAST(Program, ArrayBuffer, visitors): ArrayBuffer;

Note that the AST will be updated in-place.

Dependencies

Dependencies

ID	Version
@webassemblyjs/ast	1.14.1
@webassemblyjs/helper-buffer	1.14.1
@webassemblyjs/helper-wasm-bytecode	1.13.2
@webassemblyjs/helper-wasm-section	1.14.1
@webassemblyjs/wasm-gen	1.14.1
@webassemblyjs/wasm-opt	1.14.1
@webassemblyjs/wasm-parser	1.14.1
@webassemblyjs/wast-printer	1.14.1

Development Dependencies

ID	Version
@webassemblyjs/helper-test-framework	1.14.1

Details

npm

2026-02-24 13:52:22 +00:00

0

Sven Sauleau

Project Site

MIT

6.5 KiB

Assets (1)

wasm-edit-1.14.1.tgz 6.5 KiB

Versions (2) View all

1.14.1 2026-02-24

1.9.0 2026-02-24