title: How to use Active Choices Reactive Reference Parameter in Jenkins pipeline(jenkinsfile)
body: <p>I want achieve Picture 3. If no need update, give default value. If need update, then give user input area. </p>
  
  <p>I'd like use active reactive Reference in Jenkins pipeline code, not the jenkins GUI. Checked the <a href="https://stackoverflow.com/questions/43410204/active-choices-reactive-reference-parameter-in-jenkins-pipeline">example</a>, but user cannot input the value by them self, only provide choices. As we can see the Jenkins GUI picture 1 and 2 can use "Formatted HTML" do this, but how can we use it in pipeline or convert it to pipeline? </p>
  
  <p><a href="https://i.stack.imgur.com/tRH0T.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/tRH0T.jpg" alt="enter image description here"></a><a href="https://i.stack.imgur.com/iOcgZ.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iOcgZ.jpg" alt="enter image description here"></a><a href="https://i.stack.imgur.com/dFqbh.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dFqbh.jpg" alt="enter image description here"></a></p>