Cerner patient portal does not load on IE11 user agent string (dark blue screen, off VA network)

[mchelen-gov]

What happened?

https://patientportal.myhealth.va.gov/pages/scheduling/upcoming shows only a blank blue screen

Specs:

• Device: Ubuntu 20.04 (non-GFE network)
• Browser: Chromium
• Test User: mhvtestvet01

Steps to Reproduce

1. Go to https://www.va.gov/sign-in
2. Click "Sign in with My Healthevet"
3. Login using credentials mhvtestvet01 ; pw in slack in #vagov-cerner-launch-coordination
4. Go to https://www.va.gov/health-care/schedule-view-va-appointments/
5. Click on go to the blue "Go to My VA Health" button.
6. Browser loads https://patientportal.myhealth.va.gov/pages/scheduling/upcoming successfully
7. Change browser agent string in devtools to IE11

   Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; rv:11.0) like Gecko

8. Reload page (cache disabled)
9. Blank blue screen is shown

Desired behavior

Page should render

Acceptance Criteria

• [ ] Page renders with IE11 user agent string

How to configure this issue

• [ ] Attached to a Milestone (when will this be completed?)
• [ ] Attached to Epic (what body of work is this a part of? possibly Ongoing Maintenance)
• [ ] Labeled with Team (product support, analytics-insights, operations, triage, tools-improvements)
• [ ] Labeled with Practice Area (backend, frontend, devops, design, research, product, ia, qa, analytics, contact center, research, accessibility, content)
• [ ] Labeled with Bug

[mchelen-gov]

Tested user agent strings

Error:

• Win10 IE11

  Mozilla/5.0 (Windows NT 10.0; Trident/7.0; rv:11.0) like Gecko

• IE11 compat mode

  Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 10.0; WOW64; Trident/8.0; .NET4.0C; .NET4.0E)

Working:

• edge (windows)

  Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36 Edg/86.0.100.0

• Chrome (windows)

  Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36

• Safari (Mac)

  Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Safari/605.1.15

[mchelen-gov]

failing user agent strings cause JS errors:

https://polyfill.io/v3/polyfill.min.js?features=Array.prototype.%40%40iterator

polyfill.min.js?features=Array.prototype.%40%40iterator:3 Uncaught TypeError: Cannot convert a Symbol value to a string
    at Object.V [as f] (polyfill.min.js?features=Array.prototype.%40%40iterator:3)
    at t.exports (_hide.js:4)
    at Object.<anonymous> (es6.symbol.js:240)
    at e (bootstrap da85683d5ceac48985b8:19)
    at Object.<anonymous> (shim.js:1)
    at e (bootstrap da85683d5ceac48985b8:19)
    at Object.<anonymous> (index.js:3)
    at Object.<anonymous> (index.js:27)
    at e (bootstrap da85683d5ceac48985b8:19)
    at Object.<anonymous> (polyfills.js:11)
V @ polyfill.min.js?features=Array.prototype.%40%40iterator:3
t.exports @ _hide.js:4
(anonymous) @ es6.symbol.js:240
e @ bootstrap da85683d5ceac48985b8:19
(anonymous) @ shim.js:1
e @ bootstrap da85683d5ceac48985b8:19
(anonymous) @ index.js:3
(anonymous) @ index.js:27
e @ bootstrap da85683d5ceac48985b8:19
(anonymous) @ polyfills.js:11
e @ bootstrap da85683d5ceac48985b8:19
(anonymous) @ bootstrap da85683d5ceac48985b8:62
(anonymous) @ bootstrap da85683d5ceac48985b8:62

ComponentPagelet.js

ComponentPagelet.js:48 Uncaught ReferenceError: regeneratorRuntime is not defined
    at ComponentPagelet.js:48
    at ComponentPagelet.js:47
    at Object.<anonymous> (ComponentPagelet.js:27)
    at o (bootstrap da85683d5ceac48985b8:49)
    at Object.<anonymous> (Pagelet.js:23)
    at o (bootstrap da85683d5ceac48985b8:49)
    at Object.<anonymous> (Page.js:33)
    at o (bootstrap da85683d5ceac48985b8:49)
    at Object.<anonymous> (EAFtoTerraConverter.js:22)
    at o (bootstrap da85683d5ceac48985b8:49)
(anonymous) @ ComponentPagelet.js:48
(anonymous) @ ComponentPagelet.js:47
(anonymous) @ ComponentPagelet.js:27
o @ bootstrap da85683d5ceac48985b8:49
(anonymous) @ Pagelet.js:23
o @ bootstrap da85683d5ceac48985b8:49
(anonymous) @ Page.js:33
o @ bootstrap da85683d5ceac48985b8:49
(anonymous) @ EAFtoTerraConverter.js:22
o @ bootstrap da85683d5ceac48985b8:49
(anonymous) @ Layout.js:27
o @ bootstrap da85683d5ceac48985b8:49
(anonymous) @ HealthelifeFrameworkApplication.js:38
o @ bootstrap da85683d5ceac48985b8:49
(anonymous) @ index.js:7
o @ bootstrap da85683d5ceac48985b8:49
(anonymous) @ index.jsx:4
o @ bootstrap da85683d5ceac48985b8:49
(anonymous) @ bootstrap da85683d5ceac48985b8:144
(anonymous) @ bootstrap da85683d5ceac48985b8:144

[lalexanderson-dsva]

When the user changed their compatibility settings, they were able to load the page properly.