[SOLVED] Why does addEventListener not work on onChange event?

Question

Why does Range 1 work but not Range 2? Why does Range 2 call log2() without user changing it's value?

https://code.sololearn.com/WjVSpkAi8Rfj/?ref=app

Answer 1

It's:
r2.addEventListener('change' , log2);

instead of log2(), you need to write log2, because otherwise you're just calling the function first time and that's it, you need to pass the function itself