props: {
    demoString: {
        type: String,
        default: ''
    },
    demoNumber: {
        type: Number,
        default: 0
    },
    demoBoolean: {
        type: Boolean,
        default: true
    },
    demoArray: {
        type: Array,
        default: () => []
    },
    demoObject: {
        type: Object,
        default: () => ({})
    },
    demoFunction: {
        type: Function,
        default: function () { }
    }
}