The click event is the most device-independent event we
have. All JavaScript-capable browsers and devices have a means of firing
click events, which might be (among others): clicking
with the mouse, pressing Enter with the keyboard, touching
a touch-screen interface, pressing the Fire button on a
Sony PSP, pressing the OK button on a Web-TV remote, or
nodding in front of a head-gesture recognition interface.
The click event can be thought of as the canonical
activation event, because it always require an
explicit user action. By contrast, events like
focus or mouseover are merely tangential
to the actions that trigger them, so they should not be used as
activation events.
Activate the button below and its click event
will fire:
The JavaScript code for this example can be found in: JS_C_A2.js