Vue components / elements in v-html

What you want to do sortof breaks the normal Vue paradigm, but it can be done using Vue.compile. You'll need to use Vue.compile to generate the render functions and then manually create a new Vue instance once your component has been mounted.

Here's an example:

Vue.component('post', {
  template: `<div></div>`,
  props: { text: String },
  mounted() {
    let regex = /\B\@([\w\-]+)/gim;
    let username = this.text.match(regex)[0];
    let linkText = this.text.replace(regex, `<a href="#">${username}</a>`);
    let res = Vue.compile(`<p>${linkText}</p>`);
    
    let { render, staticRenderFns } = res;
    new Vue({ el: this.$el, render, staticRenderFns })
  }
})

new Vue({
  el: '#app',
  data() {
    return { text: `Hi @user1, how are you?` }
  }
})
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.4.4/vue.min.js"></script>
<div id="app">
  <post :text="text"></post>
</div>