Use of Mutation Events is deprecated. Use MutationObserver instead.

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Use of Mutation Events is deprecated. Use MutationObserver instead.

This is the error that I am getting. Please help me out what to do?
My javascript and jquery are not working.

Posted 17-Jan-16 23:58pm

prapti.n3

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Richard MacCutchan 18-Jan-16 7:02am

Do what the message tells you.

prapti.n3 18-Jan-16 10:16am

how can i find where I have used mutation events in my code? I was not having this problem earlier. Plaese help me locate it.

Richard MacCutchan 18-Jan-16 11:16am

Where and when does the message appear? That should tell you where it is.

prapti.n3 19-Jan-16 12:50pm

It appears on the marquee tag. But a want the moving text in my website. I can't remove it.

Richard MacCutchan 19-Jan-16 13:03pm

Sorry, but we really cannot guess what is happening with so little information.

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ZurdoDev · Answer 1 · 2016-01-18T02:12:00

Solution 1

As Richard said, you need to do what the error tells you. You are using Mutation Events somewhere in your code. Those are not allowed anymore (deprecated). The error is telling you to change your Mutation Events code to use MutationObserver instead. If you are unfamiliar with the MutationObserver you can see documentation for it here, MutationObserver - Web APIs | MDN[^].

Posted 18-Jan-16 2:12am

ZurdoDev

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prapti.n3 18-Jan-16 10:13am

how can i find where I have used mutation events in my code? I was not having this problem earlier. Plaese help me locate it.

ZurdoDev 18-Jan-16 10:23am

Doesn't the error message point to a line of code?

If not, I suggest going through the documentation, https://developer.mozilla.org/en-US/docs/Web/Guide/Events/Mutation_events

prapti.n3 18-Jan-16 10:34am

No. Its not showing. I have searched out all the events. None of them is present in my code. Suggest me something where to use mutation observer.