Как сделать ajax запрос в Vue.js?

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<template>
  <div class="container">
    <h1>Test Component</h1>
    <button @click="sendAjax">Сделать ajax запрос</button>
  </div>
</template>

<script>
import axios from 'axios'

export default {
  name: 'Test',
  methods: {
    sendAjax() {
      axios
        .get('https://httpbin.org/get')
        .then((response) => {
          console.log(response.data)
        })
        .catch((e) => {
          console.log(`Ошибка: ${e}`)
        })
    },
  },
}
</script>

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npm install --save axios

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  import axios from 'axios';

  export default {
    data() {
      return {
        posts: [],
      };
    },
    mounted() {
      axios.get('https://jsonplaceholder.typicode.com/posts')
        .then(response => {
          this.posts = response.data;
        })
        .catch(error => {
          console.log(error);
        });
    }
  }

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npm install --save vue-resource

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  import Vue from 'vue';
  import VueResource from 'vue-resource';

  Vue.use(VueResource);

  export default {
    data() {
      return {
        posts: [],
      };
    },
    mounted() {
      this.$http.get('https://jsonplaceholder.typicode.com/posts')
        .then(response => {
          this.posts = response.body;
        })
        .catch(error => {
          console.log(error);
        });
    }
  }