title: How to disable a Field in redux-form?
body: <p>I am simply trying to disable a field in <code>redux-form</code> as shown below but it does not seem to have any effect. This is <code>redux-form</code> version 7.4.2.</p>
  
  <pre><code>  &lt;Field
      name="mu"
      type="text"
      component={renderField}
      label="DRIFT FUNCTION [ μ(X(t),t) ]:"
      disabled={true} 
      validate={[required]}
    /&gt;
  </code></pre>
  
  <p>Also </p>
  
  <pre><code>  &lt;Field
      name="mu"
      type="text"
      component={renderField}
      label="DRIFT FUNCTION [ μ(X(t),t) ]:"
      props={{ disabled: true }}
      validate={[required]}
    /&gt;
  </code></pre>
  
  <p>Any help please</p>