[рони]

fori,

<input type="text" value="123&nbsp;123">
<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<input id = "vue" type="text" v-model="message">
<script>
        var vue = new Vue({
    el: '#vue',
    data: { message : "123\xa0123"
    },
    methods: {
    }
})
</script>