jQuery focusin() Method

Last Updated : 07 Jul, 2023

The jQuery focusin() is an inbuilt method that is used to gain focus on the selected element.

Syntax:

$(selector).focusin(function);

Parameter: It accepts an optional parameter “function” which gain focus on the selected element.

jQuery examples to show the working of focusin() method:
Example 1: In the below code, parameter function is passed.

HTML

<!DOCTYPE html>
<html>
 
<head>
    <script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
    </script>
 
    <!-- jQuery code to show the working of this method -->
    <script>
        $(document).ready(function () {
            $("div").focusin(function () {
                $(this).css("background-color", "green");
            });
        });
    </script>
 
    <style>
        div {
            border: 2px solid black;
            width: 50%;
            padding: 20px;
        }
 
        input {
            padding: 5px;
            margin: 10px;
        }
    </style>
</head>
 
<body>
    <!-- click inside the field focusin will take place -->
    <div>
        Enter name:
        <input type="text">
        <br>
    </div>
</body>
 
</html>

Output:

Example 2: In the below code, no parameter is passed.

HTML

<!DOCTYPE html>
<html>
 
<head>
    <script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js">
    </script>
 
    <!-- jQuery code to show the working of this method -->
    <script>
        $(document).ready(function () {
            $("#foc").click(function () {
                $(this).focusin().css(
                    "background-color", "lightgreen");
            });
        });
    </script>
 
    <style>
        div {
            border: 2px solid black;
            width: 50%;
            padding: 20px;
        }
 
        input {
            padding: 5px;
            margin: 10px;
        }
    </style>
</head>
 
<body>
    <!-- click inside the field focusin will take place and
    background color becomes change -->
    <div>
        Enter name:
        <input id="foc" type="text">
        <br>
    </div>
</body>
 
</html>