Edit in JSFiddle

new Vue({
  el: "#app",
  data: {
    html: '<div><a href="http://www.domain.com" target="_blank"><img src="https://www.image.com/image.jpg" alt="a" /></a></div>',
  },
  computed: {
    output() {
      let matched = [];
      const regex = /(\S+)=["']?((?:.(?!["']?\s+(?:\S+)=|[>"']))*.)["']?/g;
      while ((m = regex.exec(this.html)) !== null) {
        matched.push(m);
      }
      return matched;
    }
  },
  methods: {},
  mounted() {}
})