vue-select/docs/.vitepress/components/CustomHandlers.vue

<template>
  <v-select
    taggable
    multiple
    no-drop
    :map-keydown="handlers"
    placeholder="enter an email"
  />
</template>

<script>
export default {
  name: 'CustomHandlers',
  methods: {
    handlers: (map, vm) => ({
      ...map,
      50: (e) => {
        e.preventDefault()
        if (e.key === '@' && vm.search.length > 0) {
          vm.search = `${vm.search}@gmail.com`
        }
      },
    }),
  },
}
</script>