Gi•7d ago

lookupService is not a function

Hello. I was looking to rewrite a small NodeJS app with Deno2 to simplify the setup. It uses the node-opcua npm package. but when I import it, it throws an error.

error: Uncaught (in promise) TypeError: dns_1.default.lookupService is not a function
    at GetAddrInfoReqWrap.callback (file:///home/aw/.cache/deno/npm/registry.npmjs.org/node-opcua-hostname/2.128.0/dist/hostname.js:29:23)
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:39:8)
    at ext:deno_node/internal_binding/cares_wrap.ts:78:9
    at eventLoopTick (ext:core/01_core.js:175:7)

error: Uncaught (in promise) TypeError: dns_1.default.lookupService is not a function
    at GetAddrInfoReqWrap.callback (file:///home/aw/.cache/deno/npm/registry.npmjs.org/node-opcua-hostname/2.128.0/dist/hostname.js:29:23)
    at GetAddrInfoReqWrap.onlookup [as oncomplete] (node:dns:39:8)
    at ext:deno_node/internal_binding/cares_wrap.ts:78:9
    at eventLoopTick (ext:core/01_core.js:175:7)

Package was added with deno add npm:node-opcua. This is the deno.json

{
  "tasks": {
    "dev": "deno run --watch --env=.env -A src/main.ts"
  },
  "imports": {
    "@std/assert": "jsr:@std/assert@1",
    "@std/fmt": "jsr:@std/fmt@^1.0.2",
    "@std/log": "jsr:@std/log@^0.224.9",
    "@t3-oss/env-core": "npm:@t3-oss/env-core@^0.11.1",
    "node-opcua": "npm:node-opcua@^2.133.0",
    "zod": "npm:zod@^3.23.8"
  }
}

{
  "tasks": {
    "dev": "deno run --watch --env=.env -A src/main.ts"
  },
  "imports": {
    "@std/assert": "jsr:@std/assert@1",
    "@std/fmt": "jsr:@std/fmt@^1.0.2",
    "@std/log": "jsr:@std/log@^0.224.9",
    "@t3-oss/env-core": "npm:@t3-oss/env-core@^0.11.1",
    "node-opcua": "npm:node-opcua@^2.133.0",
    "zod": "npm:zod@^3.23.8"
  }
}

main.ts looks like this

import { LogLevel, setLogLevel } from "node-opcua";

// OPC-UA logger (default is LogLevel.Warning);
setLogLevel(LogLevel.Error);

import { LogLevel, setLogLevel } from "node-opcua";

// OPC-UA logger (default is LogLevel.Warning);
setLogLevel(LogLevel.Error);

Any thoughts?

2 Replies

marvinh.•7d ago

Looks like a bug. I've filed an issue for that https://github.com/denoland/deno/issues/26300

Gi•7d ago

Ah, thank you 🙃