'wasm-pack' generated unexpected JS output!

[Henny022]

generated JavaScript:

let imports = {};
imports['__wbindgen_placeholder__'] = module.exports;
let wasm;

module.exports.__wbindgen_init_externref_table = function() {
    const table = wasm.__wbindgen_export_0;
    const offset = table.grow(4);
    table.set(0, undefined);
    table.set(offset + 0, undefined);
    table.set(offset + 1, null);
    table.set(offset + 2, true);
    table.set(offset + 3, false);
    ;
};

const path = require('path').join(__dirname, 'screeprs_bg.wasm');
const bytes = require('fs').readFileSync(path);

const wasmModule = new WebAssembly.Module(bytes);
const wasmInstance = new WebAssembly.Instance(wasmModule, imports);
wasm = wasmInstance.exports;
module.exports.__wasm = wasm;

wasm.__wbindgen_start();