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How to use jquery data()

青灯夜游

Release： 2022-03-03 15:53:57

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In jquery, the data() method can be used to append data to selected elements, the syntax is "$(selector).data(name,value)"; it can also be used to obtain data from selected elements. , syntax "$(selector).data(name)".

How to use jquery data()

The operating environment of this tutorial: windows7 system, jquery1.10.2 version, Dell G3 computer.

jquery data() method

data() method appends data to the selected element, or obtains data from the selected element.

Syntax:

Return additional data from the selected element.

$(selector).data(name)

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Parameters	Description
name	Optional. Specifies the name of the data to be retrieved. If no name is specified, this method will return all stored data from the element in the form of an object.

Parameters

Description

name

Optional. Specifies the name of the data to be retrieved.

If no name is specified, this method will return all stored data from the element in the form of an object.

Append data to the selected element.

Can be a single name/value pair

$(selector).data(name,value)

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Parameters	Description
name	Required. Specifies the name of the data to be set.
value	Required. Specifies the value of the data to be set.

You can also use objects with name/value pairs to add data to selected elements.

$(selector).data(object)

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Parameters	Description
object	Required . Specifies an object containing name/value pairs.

Example: Append data to an element and then retrieve that data

<!DOCTYPE html>
<html>

	<head>
		<meta charset="UTF-8">
		<script src="js/jquery-1.10.2.min.js"></script>
		<script type="text/javascript">
			$(document).ready(function() {
				$("#btn1").click(function() {
					$("div").data("greeting", "Hello World");
				});
				$("#btn2").click(function() {
					alert($("div").data("greeting"));
				});
			});
		</script>
	</head>
	<body>
		<button id="btn1">把数据添加到 div 元素</button><br />
		<button id="btn2">获取已添加到 div 元素的数据</button>
		<div></div>
	</body>
</html>

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How to use jquery data()