Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element

Hello Everyone,

On my mobile app i am getting an Error on every page which says "Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'." , Can anyone help me out what is this error and how can i get rid of it.

Thanks ,


Hi Nitesh,

What you have provided is not enough information to even begin to help you.  At the very least, you should include your platform version, service studio version, and the full error message from the error log.  Ideally, you would share a sample application (or the real one) where the error can be recreated.


I am having the same issue, my code is right below, everything looks good, but I can't proceed more than this, its on javascript

<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />

    <title>Mini App</title>

      body {
        background: lavender;
        margin: 0;
        height: 100%;
        overflow: hidden;
      h2 {
        margin-bottom: 2em;
        text-align: center;
      div.user-photo {
        width: 150px;
        height: 150px;
        margin: 1em auto;
        position: auto;
        background: #fff;
      div.details {
        background-color: #6200ee;
        font-size: 2.3em;
        margin: 2.5em 0.2em 0.2em 0.2em;
        color: #fff;
        padding: 1.1em;
        min-height: 6em;
      img {
        width: 150px;
        height: 150px;
        border-radius: 100px;
        display: inline=block;
      footer {
        width: calc(100% - 2em);
        z-index: 500;
        position: absolute;
        bottom: 0;
        overflow: hidden;
        display: flex;
        justify-content: space-between;
        margin: 0 1em;  
      footer button.mdc-icon-button {
        margin: 0.5em;
    <h2>kingsley Okpara</h2>
    <div class="user-photo mdc-elevation--z3">
      <a href=""><img src=""></a>
    <div class="details mdc-elevation--z3"></div>
    <div class="messages"></div>

      <button id="btn-Address" class="mdc-icon-button material-icons" style="color:#ffffff;">Address</button>
   <button id="btn-Phone" class="mdc-icon-button material-icons" style="color:#ffffff;">Phone</button>
     <button id="btn-Birthday" class="mdc-icon-button material-icons" style="color:#ffffff;">Birthday</button>
      const style = window.getComputedStyle(backgroud-color, null);
      const notify = (msg) => {
        const toastr = document.querySelector('.messages');
        if(!toastr) return;
        toastr.textContent = msg;
        if(!toastr.classList.contains('on')) {
      const clearNotice = () => {
        const toastr = document.querySelector('.messages');
        if(!toastr) return;
        toastr.textContent = '';
      const displayUserPhotoAndName = (data) => {
        if(!data) return;
        // add your code here

      const getAUserProfile = () => {
        const api = '';
        // make API call here
        notify(`requesting profile data ...`);
      const startApp = () => {
        // invoke the getAUserProfile here

Hi Stacey ,

This is what i am getting :

Message:Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'.
Environment InformationeSpaceVer: 2579 (Id=10855, PubId=10808, CompiledWith=10.0.828.0)
RequestUrl: (Method: POST)
AppDomain: /LM/W3SVC/1/ROOT/LandusMobile-765-131967901520034718
FilePath: d:\OutSystems\Platform Server\running\LandusMobile.01141413462\
DeviceUUID: f9badfa0febe0edb
Locale: en-US
DateFormat: yyyy-MM-dd
PID: 2532 ('w3wp', Started='2/20/2019 1:20:18 AM', Priv=959Mb, Virt=9850Mb)
TID: 210
Thread Name:
.NET: 4.0.30319.42000
Client-Side Log
Stack:TypeError: Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'.
    at t.getAnimationClassName (
    at t.transition (
    at t.componentWillAppear (
    at t.performAppear (
    at t.componentDidMount (
    at t.o (
    at t.e.(anonymous function) [as componentDidMount] (
    at r.notifyAll (
    at r.close (
    at r.closeAll (

Platform Version: 10.0.828.0

Development Environment Version:10.0.902.0

Screenshot attached.

Hope this helps ..!

Thanks ,



Any news on this error? Started happening to us today. (switched the app and server name with * for client anonimity)

 InformationeSpaceVer: Id=14370, PubId=0, CompiledWith=11.0.614.0
DeviceUUID: 8f8f58fcfdd9c01f
Locale: en-US
DateFormat: dd-MM-yyyy
PID: 3288 ('w3wp', Started='1/23/2020 12:12:58 AM', Priv=1479Mb, Virt=2108609Mb)
TID: 46
Thread Name:
.NET: 4.0.30319.42000
DeviceModel: SM-A505FN
DeviceUUID: 8f8f58fcfdd9c01f
OperatingSystem: Android 9
NativeShell: 8.0.1
AppVersionCode: 32
AppVersionName: 0.24
NetworkStatus: Online
NetworkType: WIFI
Cordova: 8.1.0
Client-Side Log
Stack:TypeError: Failed to execute 'getComputedStyle' on 'Window': parameter 1 is not of type 'Element'.
    at t.getAnimationClassName (https://*/scripts/OutSystemsReactView.js?MIv2P848ETrJCar8mghbTw:6:2462)
    at t.transition (https://*/scripts/OutSystemsReactView.js?MIv2P848ETrJCar8mghbTw:6:35)
    at t.componentWillEnter (https://*/scripts/OutSystemsReactView.js?MIv2P848ETrJCar8mghbTw:6:609)
    at t.performEnter (https://*/scripts/OutSystemsReactView.js?MIv2P848ETrJCar8mghbTw:4:13240)
    at Array.forEach (<anonymous>)
    at t.componentDidUpdate (https://*/scripts/OutSystemsReactView.js?MIv2P848ETrJCar8mghbTw:4:12608)
    at t.o (https://*/scripts/OutSystemsReactView.js?MIv2P848ETrJCar8mghbTw:8:23562)
    at t.e.<computed> [as componentDidUpdate] (https://*/scripts/OutSystems.js?HvtKqoY2S3d44mUghdrcFg:9:20160)
    at r.notifyAll (https://*/scripts/OutSystemsReactView.js?MIv2P848ETrJCar8mghbTw:1:6738)
    at r.close (https://*/scripts/OutSystemsReactView.js?MIv2P848ETrJCar8mghbTw:4:7293)


Any news on this topic?