JQuery中attr属性和jQuery.data()学习笔记【必看】

<div data-mydata="123"></div>
consoloe.log($("div").data("mydata"));
//output 123

<a id="bar" data-foo-bar-baz="fizz-buzz" href="#">fizz buzz!</a>

$('#bar').data().fooBarBaz; //works
$('#bar').data()['fooBarBaz']; //works
$('#bar').data()['foo-bar-baz']; //does not work