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javascript - Tab switching does not take effect, how to solve the asynchronous problem?

Practice delayed tab switching, but an error is reported and the titles cannot be obtained. How to solve it? Help

世界只因有你世界只因有你2753 days ago604

reply all(1)I'll reply

  • 我想大声告诉你

    我想大声告诉你2017-05-16 13:45:51

    $('notice-title') can't get anything
    Also $('notice-title').getElementsByTagName('li') can't get anything either
    I've never seen such a mix

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