How is the menu at the bottom of Wechat official account realized?

how is the menu at the bottom of the official account of Wechat realized?
also tried to write it myself, but I always feel uncomfortable and smooth. What plug-in does Wechat use?
Thank you! ![![][2]][1]

Apr.10,2022

learn about the popover bubble pop-up plug-in. Wechat should use webui-popover


Wechat official account bottom menu is configured through the Wechat public platform backstage.
you can apply for an official Wechat account to play.


if it is hover, pure css can solve this kind of display effect. If there is no hover on the phone, bind events with js, and there should be no extra performance consumption

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