getElementsByClassName, getElementsByTagName and getElementById TypeError: is not a function

[fabiopolimeni]

Hi,

I am trying to use the plugin in its simplest form. Unfortunately, it seems that despite I can build an android app, as soon as I execute the code that contains one of these functions I get an error similar to this:

System.err: com.tns.NativeScriptException:
System.err: Calling js method onTouch failed
System.err: TypeError: DOM.getElementsByClassName is not a function

Neither of these importing methods work.

import * as DOM from "nativescript-dom"
//const DOM = require("nativescript-dom");

I use it like this const navBarItems = DOM.getElementsByTagName("nav-bar-item");

This is my packege.json

"dependencies": {
    "nativescript-dom": "^2.0.2",
    "nativescript-geolocation": "^4.3.1",
    "nativescript-google-maps-sdk": "^2.6.1",
    "nativescript-pager": "^8.0.2",
    "nativescript-theme-core": "~1.0.4",
    "tns-core-modules": "4.2.1",
    "tslib": "^1.9.3"
  },
  "devDependencies": {
    "eslint": "^5.9.0",
    "nativescript-dev-typescript": "^0.7.4",
    "nativescript-dev-webpack": "^0.18.0",
    "tslint": "^5.11.0",
    "typescript": "~2.7.2"
  },

Any idea what can be causing this? Thanks, Fabio

[NathanaelA]

1. Have you tried downloading the demo project from this repo and verifying it is not working?
2. Which version of NativeScript? (tns --version)

[fabiopolimeni]

1. No, I was looking for some demo, but I couldn't find one. On this repo, I can only see the source code of the plugin itself. What am I missing?
2. tns says 4.2.4

[hettiger]

Hi @NathanaelA I'm having a similar issue. Since migrating to NativeScript 4 the plugin no longer works when bundling with Webpack. (tns run ios still works flawlessly.)

I'm using getElementsByTagName() and I'm importing at the top of my app.module.ts file like this:

import "nativescript-dom";

I think the way I import it is the right one. I don't get the mentioned is not a function errors. However getElementsByTagName() always returns an empty array when bundling with Webpack like this:

tns run ios --bundle --env.uglify --env.aot

Can you please take a look at it? I'm pretty sure something's broken here. If you cannot reproduce it in a Webpack build: Can you please share where and how you import?