Can't understand a paragraph in MDN web docs - mistake or not?

Hi,
On page https://developer.mozilla.org/en-US/docs/Web/Guide/Events/Event_handlers there is a paragraph with words ( can be found via Cntr(Cmd)+F ) : Note that onevent handlers are called automatically, not at the programmer’s will (although you can do so, such as with mybutton.onclick(myevent) ) - How can I call it at my will?

@csv5: Thank you for this message! I’ve made a number of updates to the article you mentioned and hopefully they help. There’s clearly tons more that should be done on that page, but I need to get back to other things right now.

If anyone would like to take on finishing a cleanup job and also add the content that’s still missing on that page, it would be great. This is a pretty fundamental topic, after all.