# Bug OP-1632 - OpenProject freezes when accessed by unsupported browser

Project: OpenProject
Status: closed
URL: https://community.openproject.org/work_packages/OP-1632

## Open points

_No work packages_

## Details

| Attribute | Value |
| --- | --- |
| Date |  |
| Priority | Medium |
| Module |  |
| Target versions |  |
| Observed in versions |  |
| Sprint |  |
| Backlog bucket |  |
| Bug found in version (deprecated) |  |
| Found in mobile app version |  |
| Follow-up feedback e-mail |  |
| Requires doc change | No |
| Accessibility | No |
| Pull preview |  |
| List |  |
| Labels |  |

## People

| Attribute | Value |
| --- | --- |
| Assignee |  |
| Accountable |  |
| Product manager |  |
| Developers |  |
| Designer |  |
| Ordered by |  |
| Signed off by |  |
| Interest by |  |

## Planning

| Attribute | Value |
| --- | --- |
| Relevance |  |

## Costs

| Attribute | Value |
| --- | --- |
| Votes |  |
| Work |  |
| Labor costs |  |

## Description

**Preconditions**

  - Emoji plugin installed.
  - Unsupported browser (e.g. IE 9) used.

**Steps to reproduce**

1.  Go to openproject.org

**Actual behavior**

  - Error message displayed but browser freezes:

<!-- end list -->

    if(ignoredTags[node.tagName] || node.classList.contains('no-emojify')) {
    Unable to get property 'contains' of undefined or null reference
                                return NodeFilter.FILTER_REJECT;
                            }

**** I tested this using the emulator mode in IE 11. When trying the emulator mode in IE 10 in a VM it was working properly.

**Expected behavior**

  - Only message that browser is not diplayed.
  - When clicking on link: forwarded to wiki page of unsupported browsers.

**QA system**

  - openproject.org
  - OpenProject 4.0.0