elemenUI的input框设置了clearable属性，表单里的数据回填，发现清空按钮不起作用
通过调用vue内置的$forceUpdate()函数解决
<el-input
size="medium"
v-model="searchForm.mac"
:placeholder="$t('lang.hint-mac')"
:title="$t('lang.hint-mac')"
@input="change($event)"
clearable></el-input>
change(e){
this.$forceUpdate();
},
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