How to get the value of Select Option in Javascript?

Question

A select html look like this:
<select id="mine">
<option value="1">Hello</option>
<option value="2">World</option>
</select>

How do i get the value in javascript? I always got an error message and I'm desperate right now :)

Answer 1

https://code.sololearn.com/W13U1WbQHTcl/?ref=app

here's a demo

Answer 2

👌

Answer 3

Thank you very much @Burey :)