返回值:jQueryon(events,[selector],[data],fn)

示例

描述:

Display a paragraph's text in an alert when it is clicked:

$("p").on("click", function(){

alert( $(this).text() );

});

Pass data to the event handler, which is specified here by name:

function myHandler(event) {

alert(event.data.foo);

}

$("p").on("click", {foo: "bar"}, myHandler)

Cancel a form submit action and prevent the event from bubbling up by returning false:

$("form").on("submit", false)

Cancel only the default action by using .preventDefault().

$("form").on("submit", function(event) {

event.preventDefault();

});

Stop submit events from bubbling without preventing form submit, using .stopPropagation().

$("form").on("submit", function(event) {

event.stopPropagation();

});