The data() is an inbuilt method in jQuery which is used to attach data or get data for the selected elements.
Syntax:
$(selector).data(para1);
Parameter : It accepts an optional parameter "para1" which specifies the name of the data to retrieve for the selected element.
Return Value: It returns the retrieved data for the selected element.
jQuery code to show the working of data() method:
Code #1:
In the below code, data is attach to the selected element.
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/
jquery/3.3.1/jquery.min.js">script>
<style>
div {
display: block;
width: 500px;
font-size: 37px;
padding: 50px;
background-color: lightgrey;
}
span {
color: green;
}
style>
head>
<body>
<div>
Welcome to
<span>span>for<span>span>!
div>
<script>
$("div").data("test", {
first: "Geeks",
last: "Geeks !"
});
$("span:first").text($("div").data("test").first);
$("span:last").text($("div").data("test").last);
script>
body>
html>
Output:
Code #2:
In the below code, The data is attaching and retrieving from the "div" element using buttons.
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/
jquery/3.3.1/jquery.min.js">script>
<script>
$(document).ready(function() {
$("#b1").click(function() {
$("div").data("g", "GeeksforGeeks !!!");
});
$("#b2").click(function() {
alert($("div").data("g"));
});
});
script>
<style>
#b1,
#b2 {
padding: 10px;
margin: 5px;
}
style>
head>
<body>
<button id="b1">This will attach data to div
elementbutton>
<br>
<button id="b2">This will retrieve the attached data
to div elementbutton>
<div>div>
body>
html>
Output:
Just after clicking the run button-
After clicking the "This will retrieve the attached data to div element" button just after clicking the "This will attach data to div element" button-
After clicking the "This will retrieve the attached data to div element" button without clicking the "This will attach data to div element" button-
