el-dialog设置点击空白处不自动关闭

<template>
  <div>
    <el-dialog
      :visible="dialogVisible"
      :close-on-click-modal="false"
      @close="closeDialog"
    >
      <!-- 对话框内容 -->
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      dialogVisible: false
    };
  },
  methods: {
    showDialog() {
      this.dialogVisible = true;
    },
    closeDialog() {
      this.dialogVisible = false;
    }
  }
};
</script>