<el-cascader

:options="options"
:props="{ multiple: true, checkStrictly: true }"
clearable></el-cascader>


options: [
            {
            value: 1,
            label: '东南',
            children: [{
                value: 2,
                label: '上海',
                children: [
                { value: 3, label: '普陀' },
                { value: 4, label: '黄埔' },
                { value: 5, label: '徐汇' }
                ]
            }, {
                value: 7,
                label: '江苏',
                children: [
                { value: 8, label: '南京' },
                { value: 9, label: '苏州' },
                { value: 10, label: '无锡' }
                ]
            }, {
                value: 12,
                label: '浙江',
                children: [
                { value: 13, label: '杭州' },
                { value: 14, label: '宁波' },
                { value: 15, label: '嘉兴' }
                ]
            }]
            }, 
            {
            value: 17,
            label: '西北',
            children: [{
                value: 18,
                label: '陕西',
                children: [
                { value: 19, label: '西安' },
                { value: 20, label: '延安' }
                ]
            }, {
                value: 21,
                label: '新疆维吾尔族自治区',
                children: [
                { value: 22, label: '乌鲁木齐' },
                { value: 23, label: '克拉玛依' }
                ]
            }]
            }
        ]
       
       
       设置multiple也不可选择多个