There are three ul, on my page. I switch the contents of the ul when I click, but when I switch, I will see the content of the previous ul flash. How to solve the problem of flashing?

there are three ul, on my page. I switch the contents of the ul when I click, but when I switch, I will see the content of the last ul flash. How to solve the problem of flashing?
my code is like this 

          <ul>
            <li v-for="(item,index) in shebeide">
                <span class="span_three" :title="item.deviceName">{{item.deviceName}}</span>
                <button @click="tianjianshei(item,index)" class="tianjian_lei"></button>
            </li>
            </ul>
The effect of the

page is like this

clipboard.png

clipboard.png

when I click to add a device, the text in my last ul will flash and become current. It feels like it should be reused, but I don"t know how to solve this problem

Html html5 javascript
Mar.01,2021

ide/list.html-sharpkey" rel=" nofollow noreferrer "> vue list rendering in-place reuse

this is probably the problem.

to put it simply, when you open a page, you have already rendered a layer of data. When you leave the pop-up page, you do not empty the data, and the data still exists. Of course, you can also add a loading, to cover the data loading before the new data is re-rendered, adding a transition. Of course, the suggestion on the first floor should also be adopted. It is best to add key

.

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-429c550-5ae5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-429c550-5ae5.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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