I am trying to explore Jmeter for API testing.

I am able to add Assert using response assertion of Jmeter.

But I like a platform in Jmeter where we can write our code to assert more complex scenario of testing API tests on API.

Similar as we can say we do use of groovy scripts in SOAP-UI or javascript in postman tests using Newman node module.

Is it possible in Jmeter? 

Is there any plug-in available to achieve same in Jmeter.

I have tried to found out any tutorial or blog regarding same but land with no success. 

If anyone has tried then please do share your experience, way, blog or tutorials which can lead me to achieve same in Jmeter that would really help.

Any workaround will be helpful and appreciated in advance!!!