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)".
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)
| 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)
| 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)
| 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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