• jQuery.data() is used to set/return arbitrary data to/from an element.
• Syntax: jQuery.data(element, key, value)
• “element” is the DOM element to which the data is associated.
• “key” is an arbitrary name of the piece of data.
• “value” is value of the specified key.
• Suppose we want to set the data for a span element:

jQuery.data(span, “item”, { val1: 10, val2: “myitem” });

If we want to retrieve the data related to div element and set it to label’s data:

$(“label:val1”).text(jQuery.data(div, “item”).val1);
$(“label:val2”).text(jQuery.data(div, “item”).val2);

See the following links also:

• What is jQuery explain in four steps?
• What is jQuery Selectors? Give some examples.
• In what way can we give fade effect in jQuery?
• Write the animate function in jquery?
• What are the advantages of jquery?
• What is .siblings() method in jQuery ?
• How to mention the css width in jquery code?
• Explain bind() vs live() vs delegate() methods in jquery?
• How to use of jQuery.data()?
• How to write the each() function in jQuery?