Vue.js 带下拉选项的输入框(Textbox with Dropdown)组件

<script type="text/x-template" id="dropdown">
    <div class="dropdown" v-if="options">
        <!-- Dropdown Input -->
        <input  :type="type"
                :disabled="disabled"
                v-model="input_value"
                @focus="showOptions()"
                @blur="exit()"
                @keyup="keyMonitor"
                @input="input_value = inputRule(type)" />
...
</script>
<script>
    Vue.component('dropdown', {
        template: '#dropdown',
        props: {
            type: String,
            options: Array,
            disabled: Boolean,
            value: String
        },
...
        methods: {
            inputRule:function(type){
                var value;
                switch(type){
                    case 'text':
                        value = this.input_value.replace(/[^a-zA-Z0-9]/g,'');
                        break;
                    case 'number':
                        value = this.input_value.replace(/^(?![+-]?\d+(\.\d+)?$)/g,'');
                        break;
                    case 'percentage':
                        value = this.input_value.replace(/[^\d]/g,'');
                        value = value > 100 ? '100' : value;
                        value = value < 0 ? '0' : value;
                        break;
                    default:
                        console.log("no limitation");
                }
                return value;
            },
...
</script>

<dropdown   type = "text"
            :options = "text_options" 
            :value = "text_value"
            :disabled = "text_disabled" 
            @on_change_input_value = "onTextChange">
</dropdown>

data: function () {
    return {
        text_value: 'ccc',
        text_disabled: false,
        text_options: [
            { id: 1, name: 'a' },
            { id: 2, name: 'bb' },
            { id: 3, name: 'ccc' },
            { id: 4, name: 'DDDd' },
            { id: 5, name: 'eeeee' },
            { id: 6, name: 'fffff ' },
            { id: 7, name: 'gggggg' },
            { id: 8, name: 'hhhhhhh' },
            { id: 9, name: 'iiiiiiii' },
        ],
        ...
    }
},
...
methods: {
    onTextChange: function (new_text_value) {
        this.text_value = new_text_value;
    },
...
},