02-VUserSearchForm.vue

<script>
export default {
  name: 'UserSearchForm',
  data() {
    return {
      username: ''
    }
  }
}
</script>

<template>
  <form @submit.prevent="$emit('submitted', username)">
    <input type="text" v-model="username" />
    <button type="submit">Enviar</button>
  </form>
</template>