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Uncaught TypeError: Cannot read property 'blur' of null

See original GitHub issue

I captured events on an react app (using the antd component library) and if I change an input text, I get the error during playback (using cdn rr-webplayer@latest with basically just the example code from the guide).

Uncaught TypeError: Cannot read property 'blur' of null
    at e.applyIncremental (index.js:1)
    at i (index.js:1)
    at Object.doAction (index.js:1)
    at r (index.js:1)

It stops the playback, but if I click play again, it will continue (although after I can’t replay it again).

The code base is for a private client so I can’t share for replay events (will try to reproduce with sharable code alter)… Just wondering if you have any ideas why this might happen?

Issue Analytics

  • State:closed
  • Created 5 years ago
  • Comments:8 (5 by maintainers)

github_iconTop GitHub Comments

1reaction
Yuyz0112commented, Jan 6, 2019

@ChuckJonas Yes, you are right. Because we can not find what cause this without a reproducible events log, so the best thing we can do is to add some safe check and prevent an exception stop the whole world. Previously I do not do this because I want to see whether there is some corner case rrweb does not cover, and a not handled error may encourage users to report the bug. But now more people are trying to use rrweb in production, so safe check and warning messages are more suitable.

1reaction
evexoiocommented, Dec 28, 2018

Ill give this a go tomorrow if the author didnt fix it already 🙃

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