There seems to be an issue with the Angular zone.js and zone-evergreen.js files showing an error that reads:

My Angular 11 app suddenly started showing errors across all browsers and environments (local, staging, prod) about an hour ago without any updates:

Uncaught TypeError: t.getElementsByTagName is not a function
    at computeStackTrace.js:338
    at Array.forEach (<anonymous>)
    at computeStackTrace.js:338
    at Array.forEach (<anonymous>)
    at MutationObserver.<anonymous> (computeStackTrace.js:338)
    at l.invoke (polyfills.98c82c2662d9589ab04d.js:formatted:278)
    at a.runGuarded (polyfills.98c82c2662d9589ab04d.js:formatted:119)
    at MutationObserver.<anonymous> (polyfills.98c82c2662d9589ab04d.js:formatted:98)

The dependencies listed in our package.json are as follows:

    "dependencies": {
        //List of dependencies here
    },

We have tried multiple solutions to fix the issue, including upgrading locally to Angular 12, but nothing has solved it so far.

Has anyone encountered a similar problem before?

angulartypescriptzone.js

Answer №1

Success! It took us 2 hours, but we were able to identify the issue: an unexpected Hubspot (CRM) script was causing disruptions in our index.html file... (seems like it was messing up the HTML layout)

By removing the <script> tag, everything reverted back to its original state immediately... Remembering this experience for future reference in case someone encounters a similar obstacle someday!

Answer №2

HubSpot has confirmed that the problem has been resolved, as stated here:

This issue was affecting my project as well, and we last encountered it in production on December 1st, 2021 at 1:10pm EST.

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