jQuery : scrollheight of an element gives undefined value

jQuery : scrollheight of an element gives undefined value
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

So here is a secret hidden feature I promissed to tell you.
This is a YouTube's feature which works on Desktop.
First, Make sure this video is playing.
Then, type the letters 'awesome' on the keyboard.
You will see a flashing rainbow instead of a regular progress bar on YouTube.

A brief introduction of myself,
Hello, I am Delphi.
I help you answer your questions.
jQuery : scrollheight of an element gives undefined value
Let me know if you have more specific queries by commenting or chatting with me.
If you have an answer or any additional information on the answer, please leave a comment below.
I will 'heart' your answer to show my gratitude for your contribution.
element : of value undefined an jQuery scrollheight gives

Видео jQuery : scrollheight of an element gives undefined value канала Hey Delphi