JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.16/vue.min.js"></script>
<script src="https://unpkg.com/vue-multiselect@2.1.0/dist/vue-multiselect.min.js"></script>
<link rel="stylesheet" href="https://unpkg.com/vue-multiselect@2.1.0/dist/vue-multiselect.min.css">
<div id="app">
  <multiselect 
    v-model="value" 
    :options="options"
    track-by="library"
    :custom-label="customLabel"
    :show-labels="false"
    >
  </multiselect>
  <pre>{{ value }}</pre>
</div>

CSS

* {
  font-family: 'Lato', 'Avenir', sans-serif;
}

.multiselect {
  width: fit-content
}

.multiselect__content-wrapper, .multiselect__element {
  width: fit-content; 
}

 .multiselect__option {
  width: 100%; 
}

JavaScript

new Vue({
	components: {
  	Multiselect: window.VueMultiselect.default
	},
	data: {
  	value: { language: 'JavaScript', library: 'Vue-Multiselect' },
  	options: [
    	{	language: 'JavaScript', library: 'Vue.js' },
      { language: 'JavaScript', library: 'Vue-Multiselect 12345' },
      { language: 'JavaScript', library: 'Vuelidate' }
    ]
	},
  methods: {
  	customLabel (option) {
      return `${option.library} - ${option.language}`
    }
  }
}).$mount('#app')