JQuery Id selector selects elements with the given id attribute. It represents the tag with the given ID in the document object model. The id selector is a name preceded by a hash character (#). The id selector matches an element based on contents of the given id attribute which match exactly the value given in the selector.
It also possible to set styles for elements by using the id attribute. If we have given element with specially named ID and do not have class name attached that defines what we want to select, then we can make use of ID selection. The id can be used to select one element in the DOM. If we use more than once, that ID will select the first matched element in the DOM.
JQuery Id Selector Syntax
$(“#id”);
It has parameter called id is a required parameter which selects all the elements with specified id attribute.
JQuery Id Selector Example
<!doctype html>
<head>
<title>JQuery Id Selector</title>
<script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
</head>
<h2>JQuery Id Selector Example</h2>
<style>
h4#myval{
border-style:groove;
}
</style>
<script type="text/javascript">
$(document).ready(function(){
$("#myval").css("color", "green");
});
</script>
<body>
<h4>Hello world!!!</h4>
<h4 id="myval">jQuery is a JavaScript Library.</h4>
<h4>The jQuery simplifies JavaScript programming.</h4>
</body>
</html>
- As shown in the above program, we have used the code inside $(document).ready which is an event which fires up when document is ready. It will run once the page document object model is ready for JavaScript code to execute.
- $(“#myclass”).css(“color”, “green”); line defines id selector which selects the element with specific id attribute and display that selected element with green color.
- When we run the above script, we will get the all elements defined under body tag. The id selector manipulates the elements which are assigned to it. Here id attribute is myval which matches the element exactly with value given in the selector and selected element will get display with grooved border.
JQuery Id Selector Demo
When you run the above example, you would get the following output:
JQuery Has Attribute Selector Example