VUEJS unfold fold can you control multiple unfold fold with one method?

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problem description

the environmental background of the problems and what methods you have tried

unfold:function () {

        this.isShow = !this.isShow;
     
            if( this.isShow == true){
                this.number  =  this.bookData.length;
            }else{
                this.number  =  5;
            }



      this.twoNumber  =  this.isRead.length;
      this.threeNumber  =  this.notRead.length;

    },

related codes

< dl class= "user-book-rack" >

    <dt>({{ "{{ bookData.length }}" }})
        <a href="javascript:void(0);"  @click="unfold(1)" v-show="!isShow"></a>
        <a href="javascript:void(0);" @click="unfold" v-show="isShow" ></a>
    </dt>
    <dd class="clearfix">
        <ul v-if="bookData.length != 0">
            <li v-for="(lists,index) in bookData"v-if="index < number ">
                <book-rack :list="lists"></book-rack>
            </li>
        </ul>
        <div class="no-content" v-else>
            <img src="https://cdn1.ishuteng.cn/user/201807/31/b60f0399ad1ba7ad528c27b6a9d727de" />
            <div class="reminder">
                

<a href="/book"></a> </div> </div> </dd> </dl>

/ / Please paste the code text below (do not replace the code with pictures)

what result do you expect? What is the error message actually seen?

Apr.03,2021
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-64f5-1e52a74-451bf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e52a74-451bf.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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