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返回值:jQuery
data([key],[value])
概述
在元素上存放或读取数据,返回jQuery对象。
当参数只有一个key的时候，为读取该jQuery对象对应DOM中存储的key对应的值，值得注意的是，如果浏览器支持HTML5，同样可以读取该DOM中使用 data-[key] = [value] 所存储的值。参见最后一个示例。
当参数为两个时，为像该jQuery对象对应的DOM中存储key-value键值对的数据。
如果jQuery集合指向多个元素，那将在所有元素上设置对应数据。 这个函数不用建立一个新的expando，就能在一个元素上存放任何格式的数据，而不仅仅是字符串。
V1.4.3 新增用法, data(obj) 可传入key-value形式的数据。
参数
keyStringV1.23
存储的数据名.
key,valueString,AnyV1.2.3
key:存储的数据名
value:将要存储的任意数据
objobjectV1.4.3
一个用于设置数据的键/值对
data()V1.4.3
示例
描述:
在一个div上存取数据
HTML 代码:
<div></div>
jQuery 代码:
$("div").data("blah"); // undefined
$("div").data("blah", "hello"); // blah设置为hello
$("div").data("blah"); // hello
$("div").data("blah", 86); // 设置为86
$("div").data("blah"); // 86
$("div").removeData("blah"); //移除blah
$("div").data("blah"); // undefined描述:
在一个div上存取名/值对数据
HTML 代码:
<div></div>
jQuery 代码:
$("div").data("test", { first: 16, last: "pizza!" });
$("div").data("test").first //16;
$("div").data("test").last //pizza!;描述:
在HTML5规范中div中读取预存的data-[key]值
HTML 代码:
<div data-test="this is test" ></div>
jQuery 代码:
$("div").data("test"); //this is test!;