Jenkins parameter value not displaying - html

Question

Goal: Declare a conditional multi-line string parameter
Approach:
I have defined two jenkins parameters.
Active choices parameter
Active choices reactive reference parameter(Choice type: Formatted HTML)
In the pipeline, I am just looping over both parameters and printing them
pipeline {
agent any
stages {
stage('print each paramter') {
steps {
script{
params.each {param ->
println "${param.key} -> ${param.getValue()} "
}
}
}
}
}
}
and this is the output
Second parameter is not printed. I have also tried echoing it with
echo ${inventory}
echo ${param.inventory}
echo ${params.inventory}
but it's not working.
Any suggestions how I can declare a conditional multi-line string parameter?

Answer 1

Active choice reactive parameters rendered as HTML can be passed to build only if is hidden and formatted as input. See Behavior and Rendering Summary in the official documentation.
The HTML parameters are only for visualization purposes, not for returning a user input value. For build parameters, use active choice and active choice reactive parameters.