jenkins_changeset

pipeline {
   agent any
   stages {
    stage('Deploy Web app to Azure'){
      when { changeset "*/component_a/**"} //Will execute your steps if any file change inside the component_a directory
        steps {
            //Your steps
        }
    }

    stage('Deploy API service to Azure portal'){
        when { changeset "*/component_b/**"} //Will execute your steps if any file change inside the component_b directory
         steps {
             //Your steps  
         }
    }
}