Answers for "javascript within html"

kill all server 5000 mac

#First run this, to get port information (with the port you want to kill)
sudo lsof -i :3000 

#Then run this, with <PID> replaced by the value in the column returned by previous command.
kill -9 <PID>

port finding in macos

$ lsof -nP -iTCP -sTCP:LISTEN | grep 8000

running ports in mac

sudo lsof -PiTCP -sTCP:LISTEN

include script in html

<script type="text/javascript" src="/path/to/script.js"></script>

how to link javascript to html

<script src = "index.js"></script>

how to enter javascript in html

<script type="text/javascript">
  alert("This alert box was called with the onload event");
</script>