VUE中使用ElementUI组件的单选按钮el-radio-button实现第二点击时取消选择的功能

页面样式为：

html 代码为：

日志等级：
<el-radio-group v-model="logLevel"><el-radio-button label="DEBUG" @click.native.prevent="changeLogLevel('DEBUG')">DEBUG</el-radio-button><el-radio-button label="INFO" @click.native.prevent="changeLogLevel('INFO')">INFO</el-radio-button><el-radio-button label="ERROR" @click.native.prevent="changeLogLevel('ERROR')">ERROR</el-radio-button>
</el-radio-group>

js代码为：（记得在data中声明loglevel:""）

    changeLogLevel(val) {if (this.logLevelChecked && val == this.logLevel) {this.logLevelChecked = "";this.logLevel = "";this.getLogAggregation();} else {this.logLevelChecked = 1;this.logLevel = val;this.getLogAggregation();}}