jQuery : Twitter Bootstrap. Why do modal events work in JQuery but NOT in pure JS?

jQuery : Twitter Bootstrap. Why do modal events work in JQuery but NOT in pure JS?
To Access My Live Chat Page,
On Google, Search for "hows tech developer connect"

I have a hidden feature that I promised to tell you about.
This is a YouTube's feature which works on Desktop.
First, Make sure the video is currently in playing mode.
Then, type the letters 'awesome' on your keyboard as the next step.
Your YouTube progress indicator will turn into a shimmering rainbow.

A brief introduction of myself,
Hey, I am Delphi.
Allow me to provide support in answering your questions.
jQuery : Twitter Bootstrap. Why do modal events work in JQuery but NOT in pure JS?
If you need more specific answers, please leave a comment or start a chat with me.
We appreciate your participation, so please feel free to comment below with your answer or insights.
Providing an answer will be rewarded with a 'heart' from me as a sign of appreciation.
pure Bootstrap. jQuery : in in modal JQuery JS? do Twitter events but work NOT Why