问Vue JS出生日期选取器

EN

    <template>
    <div class="styled-form__field">
        <label class="styled-form__label">{{ label }}</label>
        <span
            :class="['styled-form__error', {'is-visible': error}]"
        >{{ error }}</span>

        <date-picker
            :value="value"
            lang="en"
            :format="'DD MMMM YYYY'"
            :placeholder="' '"
            :width="'auto'"
            :input-class="datePickerClass"
            :not-before="datePicker.start"
            :not-after="datePicker.finish"
            @input="changeHandler"
        ></date-picker>
    </div>
</template>

<script>
    import moment from 'moment';
    import DatePicker from '../common/DatePicker.vue';

    export default {
        components: {
            DatePicker
        },
        props: {
            value: {
                required: true
            },
            label: String,
            error: String
        },
        data() {
            return {
                datePicker: {
                    start: moment().subtract(115, 'years').toDate(),
                    finish: moment().subtract(1, 'days').toDate()
                }
            };
        },
        computed: {
            datePickerClass() {
                return this.error ? 'styled-form__date-picker is-invalid' : 'styled-form__date-picker';
            }
        },
        methods: {
            changeHandler(newValue) {
                let parsedValue = '';
                if (newValue !== '') {
                    parsedValue = moment(newValue).format('YYYY-MM-DD');
                }
                this.$emit('input', parsedValue);
            }
        }
    };
</script>