html - Find JavaScript handler connected to a button's click event

During some code investigating, I found a html submit button like
this:

I
know somewhere there is javascript code that handeles the button
click event. How can I find that javascript
code?

Answer

In
Firefox:

1. F12


2. Find
   the line you want to inspect


3. Click on the small
   ev button at the end of the line (if there is nothing then
   no JavaScript is linked)


4. See what is linked to
   it

In
Chrome:

1. F12


2. Click
   on the line you want to inspect


3. Click on the
   "Event Listeners" Tab (where you see the styles by
   default)


4. There you can see the linked
   events

In Edge:

1. F12



2. Click
   on the DOM Explorer tab


3. Click on the line you want to
   inspect


4. Click on the "Events"
   Tab (where you see the styles by default)


5. There you can
   see the linked events