How can I change data-id value in class with a script?

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I need to set random data-id with two value A y B. I need a script that can do this

What I have tried:

<div class="demo" data-id="A" />
....
</div>

Posted 23-Feb-22 8:40am

Member 15545780

Updated 24-Feb-22 8:56am

v10

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Andre Oosthuizen 24-Feb-22 15:16pm

Luckily we can not read minds here otherwise we would have had a dull communicating species on hand! No code, no explanation, even stackoverflow stopped helping you...

if I read your mind correctly, which I doubt!!!! see THIS

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