title: Remove validation error upon change on the input field
body: <p>I'm new to using Vue and wondering how I can get a validation error removed from its associated input field as the input field value changes. I store my input field values in an object called <code>fields</code> inside <code>data()</code> as below (small snippet):</p>
  
  <pre><code> fields: {
    email_type: '',
    date_of_birth: '',
    country_of_birth: '',
  }
  </code></pre>
  
  <p>I also store my validation errors inside an object called <code>errors</code>. </p>
  
  <p>When the user submits the form and gets validation errors, the error object fills up. An example is below:</p>
  
  <pre><code>{"email_type":["The email type field is required."],
  "date_of_birth":["The date of birth field is required."],
  "country_of_birth":["The country of birth field is required."]
  </code></pre>
  
  <p>To display the validation error under the input, I do:</p>
  
  <p><code>&lt;small class="font-weight-bold help text-danger" v-if="errors.{{$name}}" v-text="errors.{{$name}}[0]"&gt;&lt;/small&gt;</code></p>
  
  <p>A sample of my inputs are (I use Laravel blade to insert the "name" of the field) with <code>{{$name}}</code>:</p>
  
  <p><code>&lt;input @change="removeValidationError(errors.{{$name}})" v-model="fields.{{$name}}" class="form-control" value=""&gt;</code></p>
  
  <p>The <code>removeValidationError()</code> method is what should be removing that specific validation error from the <code>errors</code> object however this is not working. My <code>removeValidationError</code> method is below:</p>
  
  <pre><code>removeValidationError : function(errorField){
  
      if(errorField !== undefined){
          console.log(errorField);
          errorField = "";
          delete errorField;
      }
  
  },
  </code></pre>
  
  <p>As you can see I have tried both to empty the field as well as delete it but this has no effect. I do not even get any error messages in the console however when I console.log <code>errorField</code> it does display the error message. </p>
  
  <p>(Additional info, I get my validation using Laravel) </p>
  
  <p>What is the best approach for this? Thanks</p>