JavaScript VueJS 2 input filter groups vuejs input filter,vuejs filter input value,vuejs v-model

I have an input:

<input type="text" placeholder="filter by country name" />
Answer:1

Firstly, you need to grab the string from the input field and use it as your search query. This is done by the v-model directive, which keeps the view and data in sync.

So, in your template:

<input type="search" v-model="query">

And the model:

data() {
  return {
    query: '',
    countryList: [], // empty while data arrives
  }
}

When we load the data, we're gonna keep the original list. We're not doing anything with it yet. We'll group it later, while we also filter it.

xhr.onload = function() {
  self.countryList = JSON.parse(xhr.responseText);
};

Now, the continents you want to display are not just _.groupBy'd anymore -- instead, they are also filtered. Furthermore, this filtering needs to happen whenever query changes, too. A perfect candidate for a computed property.

computed: {
  continents() {
    const filtered = this.countryList.filter(({name}) => {
      return name.toLowerCase().includes(this.query.toLowerCase())
    });
    return _.groupBy(filtered, "subregion");
  },
},

Now we just need to loop over this computed property continents.

<li v-for="subregion in continents">
    {{ subregion[0].subregion }}
    <ul>
      <li v-for="country of subregion">
          {{ country.name }} ({{ country.callingCodes[0]}})</label>
      </li>
    </ul>
  </li>
</ul>
Answer:2

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