title: How to trigger blur event of "select" using element-ui and vuejs after selecting an option?
body: <p>I am using element-ui and vuejs.
  I have a select element that looks like this</p>
  
  <pre><code>&lt;el-form-item label="City" prop="city"&gt;
       &lt;el-select 
              v-model="form.city" 
              multiple 
              filterable
              remote
              auto-complete = "address-level2"
              no-match-text = "No data found"
              :remote-method = "remoteMethod"
              :loading = "loading"
              placeholder="Select City"&gt;
            &lt;el-option
              v-for = "(item,index) in cities"
              :key = "index"
              :label = "item.name"
              :value = "item.key"
            &gt;&lt;/el-option&gt;
       &lt;/el-select&gt;
  &lt;/el-form-item&gt;
  </code></pre>
  
  <p>Now I want to trigger the blur event of this select after user selects an option so that the dropdown option collapses.</p>
  
  <p>This is my remote method</p>
  
  <pre><code>remoteMethod: _.throttle(function(query) {
          this.loading = true;
          axios({
              method: 'get',
              url: someUrl
          }).then(response =&gt;{
              if(response.data.status === false){
                  this.$notify.error({
                      title: 'Error',
                      message: response.data.message
                  });
              }
              else if(response.data.status === true &amp;&amp; response.data.data.length != 0){
                  this.loading = false;
                  this.cities = response.data.data;
              }
          })            
      }, 1500),
  </code></pre>