Vue version

3.4.21

Link to minimal reproduction

Steps to reproduce

use defineComponent in @element-plus/icons-vue@2.3.1

What is expected?

No errors

What is actually happening?

Error that breaks the application.

Uncaught TypeError: isFunction is not a function
    at defineComponent (runtime-core.esm-bundler.js:2440:10)
    at index.js:7:80

file:@vue+runtime-core@3.4.21/node_modules/@vue/runtime-core/dist/runtime-core.esm-bundler.js

/*! #__NO_SIDE_EFFECTS__ */
// @__NO_SIDE_EFFECTS__
function defineComponent(options, extraOptions) {
  return isFunction(options) ? (
    // #8326: extend call and options.name access are considered side-effects
    // by Rollup, so we have to wrap it in a pure-annotated IIFE.
    /* @__PURE__ */ (() => extend({ name: options.name }, extraOptions, { setup: options }))()
  ) : options;
}

System Info

System:
    OS: Windows 10 10.0.19045
    CPU: (8) x64 Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
    Memory: 2.17 GB / 15.83 GB
  Binaries:
    Node: 18.12.1 - C:\Program Files\nodejs\node.EXE      
    Yarn: 1.22.19 - ~\AppData\Roaming\npm\yarn.CMD        
    npm: 8.19.2 - C:\Program Files\nodejs\npm.CMD
    pnpm: 8.6.11 - ~\AppData\Local\pnpm\pnpm.CMD
  Browsers:
    Internet Explorer: 11.0.19041.3636

Any additional comments?

No response

The reproduction you provided doesn't occur any errors, did you paste the wrong link?

sorry, it's not my use defineComponent, it's in @element-plus/icons-vue@2.3.1

/*! Element Plus Icons Vue v2.3.1 */


// unplugin-vue:/home/runner/work/element-plus-icons/element-plus-icons/packages/vue/src/components/add-location.vue?vue&type=script&setup=true&lang.ts
import { defineComponent as _defineComponent } from "vue";
import { createElementVNode as _createElementVNode, openBlock as _openBlock, createElementBlock as _createElementBlock } from "vue";
var add_location_vue_vue_type_script_setup_true_lang_default = /* @__PURE__ */ _defineComponent({
  name: "AddLocation",
  __name: "add-location",
  setup(__props) {
    return (_ctx, _cache) => (_openBlock(), _createElementBlock("svg", {
      xmlns: "http://www.w3.org/2000/svg",
      viewBox: "0 0 1024 1024"
    }, [
      _createElementVNode("path", {
        fill: "currentColor",
        d: "M288 896h448q32 0 32 32t-32 32H288q-32 0-32-32t32-32"
      }),
      _createElementVNode("path", {
        fill: "currentColor",
        d: "M800 416a288 288 0 1 0-576 0c0 118.144 94.528 272.128 288 456.576C705.472 688.128 800 534.144 800 416M512 960C277.312 746.688 160 565.312 160 416a352 352 0 0 1 704 0c0 149.312-117.312 330.688-352 544"
      }),
      _createElementVNode("path", {
        fill: "currentColor",
        d: "M544 384h96a32 32 0 1 1 0 64h-96v96a32 32 0 0 1-64 0v-96h-96a32 32 0 0 1 0-64h96v-96a32 32 0 0 1 64 0z"
      })
    ]));
  }
});

This didn't help, can you provide a minimal reproduction?

This didn't help, can you provide a minimal reproduction?

https://stackblitz.com/edit/vitejs-vite-95kqzr?file=package.json,src%2Fmain.js,src%2FApp.vue&terminal=dev it's happen when i use "@element-plus/icons-vue": "^2.3.1", and "@form-create/element-ui": "^2.5.33", but @form-create/element-ui@2.x is used for Vue2, there's no error when i update @form-create/element-ui to the 3.x version.

So the problem was a dependency that is not for Vue 3? Then we don't have a bug. Closing this.

yes, thank u!