Luadata by Example: Using the WASM Module

luadata compiles to WebAssembly, letting you convert Lua data to JSON directly in the browser. The luadata.js wrapper provides a clean API.

import { init, convert } from "./luadata.js";

// Initialize the WASM module (do this once)
await init();

// Basic conversion
const json = convert('playerName = "Thrall"');
console.log(json);

output

{
  "playerName": "Thrall"
}

You can pass options as a second argument to convert(). The options mirror the Go API:

const json = convert(luaInput, {
    emptyTable: "array",           // "null", "omit", "array", "object"
    arrayMode: "sparse",           // "none", "index-only", "sparse"
    arrayMaxGap: 10,               // used with "sparse" mode
    stringTransform: {
        maxLen: 100,
        mode: "redact",            // "truncate", "empty", "redact", "replace"
    },
});

Build the WASM module with:

bash

make build-wasm

This produces bin/web/luadata.wasm along with the supporting JavaScript files. Serve the bin/web directory with any HTTP server to use it.

Try it live with the interactive converter tool — it uses the same WASM module under the hood.

Want more flexibility? Open the interactive converter to try any Lua input with all available options.

← Schema String Formats