About the city selector of vue

first of all, the interface looks like this

clipboard.png

:
1.elementUI
2.: -
3.: - Mayabeque
4.Mayabeque

clipboard.png

according to the normal logic, I deleted the country, and the corresponding province should be deleted automatically.

<el-select v-model="countryID" multiple filterable placeholder="" @change="loadRegion()">
    <el-option
        width="100%"
        v-for="item in list_country"
        :key="item.value"
        :label="item.name"
        :value="item.value">
    </el-option>
</el-select>    
{{countryID}}
<el-select v-model="regionID" multiple filterable placeholder="">
    <el-option
        width="100%"
        v-for="item in list_region"
        :key="item.value"
        :label="item.name"
        :value="item.value">
    </el-option>
</el-select> 

function of loadRegion ():

1:
1.
2.this.list_region = 

question : this.countryID is used to save the country selected by the user, but I don"t know how to judge. If the country deletes the corresponding province, it also deletes it.


there is no need to judge. The country has changed, and the content of your province and city is not clear yet.

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-64f5-1be5a46-30cdc.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1be5a46-30cdc.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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