CODE EXAMPLE FOR JAVASCRIPT

Vuejs v-model when enter pressed

<input type="text" v-on:keyup.enter="submit" />
<p> {{ outputValueOnEnter }} </p>

//In data() :
outputValueOnEnter = ''

// In methods: 
submit(e) {
 this.outputValueOnEnter = e.target.value
 e.target.value = ''
}