el-cascader----------element联级菜单回显

//映射后台的字段显示

ruleForm:[], options: [{ value: 'zhinan', label: '指南', children: [{ value: 'shejiyuanze', label: '设计原则', children: [{ value: 'yizhi', label: '一致' }, { value: 'fankui', label: '反馈' } , { value: 'kekong', label: '可控' }] } ] }],

回显设置数据 this.ruleForm = ['zhinan','shejiyuanze','yizhi']

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