# Apm-rum-angular not works

**URL:** <https://discuss.elastic.co/t/apm-rum-angular-not-works/245405>\
**Category:** APM\
**Tags:** rum\
**Created:** [August 18, 2020, 11:19am UTC](https://discuss.elastic.co/t/apm-rum-angular-not-works/245405 "2020-08-18T11:19:50Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![suikast42](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/suikast42/32/29865_2.png) [@suikast42](https://discuss.elastic.co/u/suikast42)\
**Post date:** [August 18, 2020, 11:19am UTC](https://discuss.elastic.co/t/apm-rum-angular-not-works/245405/1 "2020-08-18T11:19:50Z")

</div>

I try to setup simple angular project with apm. Biut I got the error ERROR in Cannot read property '0' of undefined on ng b or ng s.

[Sample Project link](https://github.com/suikast42/ApmTest)

My angular env:  
npm version is 6.14.8

![image](https://us1.discourse-cdn.com/elastic/original/3X/5/4/543d63896f26fa8bb47d2c330f2457008f18181d.png)

---

<div class="post-metadata">

**Author:** ![suikast42](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/suikast42/32/29865_2.png) [@suikast42](https://discuss.elastic.co/u/suikast42)\
**Post date:** [August 18, 2020, 1:43pm UTC](https://discuss.elastic.co/t/apm-rum-angular-not-works/245405/2 "2020-08-18T13:43:57Z")

</div>

So I solved the issue.

1. The polyflile.js needs two imports

```auto
import 'core-js/es/reflect';
import 'reflect-metadata'

```

1. tsconfig.base.json needs to be modified.

```auto
 {
  "angularCompilerOptions": {
    "enableIvy": false
  },
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es5",
    "module": "esnext",
    "typeRoots": ["node_modules/@types"],
    "lib": [
      "es2018",
      "dom"
    ]
  }
}

```

[Link to working project.](https://github.com/suikast42/ApmTest)

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [September 8, 2020, 9:44am UTC](https://discuss.elastic.co/t/apm-rum-angular-not-works/245405/3 "2020-09-08T09:44:04Z")

</div>

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