Events are normally used in combination with functions, and the function will not be executed before the event occurs (such as when a user clicks a button).
The onclick event is the most frequently used event type which occurs when a user clicks the button, some type of event will happen.
Example :
These two event types will help you create nice effects with images or even with text as well. The onmouseover event triggers when you bring your mouse over any element and the onmouseout triggers when you move your mouse out from that element.
Example :
onsubmit is an event that occurs when you try to submit a form.
Example :