jQuery | focus() with Examples

The focus() is an inbuilt method in jQuery which is used to focus on an element. The element get focused by the mouse click or by the tab-navigating button.
Syntax:

$(selector).focus(function)

Here selector is the selected element.
Parameter: It accepts an optional parameter “function” which specifies the function to run when the focus event occurs.
Return Value: It returns the selected element which get focused.

jQuery code to show the working of focus() method:
Code #1:
In the below code, a function is passed to this method.

<html> 
  
<head> 
    <style> 
        span { 
            display: none; 
        } 
          
        body { 
            width: 35%; 
            height: 50px; 
            border: 2px solid green; 
            padding: 35px; 
            margin: 10px; 
        } 
    </style> 
    <script src="https://code.jquery.com/jquery-1.10.2.js"> 
    </script> 
</head> 
  
<body> 
    <!-- this paragraph element get focused -->
    <p> 
        <input type="text"> <span>focused</span></p> 
  
    <!-- jQuery cdee to show working of this method -->
    <script> 
        $("input").focus(function() { 
            $(this).next("span").css("display", "inline"); 
        }); 
    </script> 
  
</body> 
  
</html> 

Output:
Before the mouse clicking inside of the input field-

After the mouse clicking inside of the input field with text “GeeksforGeeks”-

Code #2:
In the below code, no parameter is passed to this method.

<html> 
  
<head> 
    <style> 
        span { 
            display: none; 
        } 
          
        body { 
            width: 30%; 
            height: 50px; 
            border: 2px solid green; 
            padding: 35px; 
            margin: 10px; 
        } 
    </style> 
    <script src="https://code.jquery.com/jquery-1.10.2.js"> 
    </script> 
</head> 
  
<body> 
    <!-- this paragraph element get focused -->
    <p> 
        <input type="text"> <span>focused</span></p> 
  
    <!-- jQuery code to show working of this method -->
    <script> 
        $("input").focus(); 
    </script> 
  
</body> 
  
</html> 

Output:
Before the mouse is clicked inside of the input field-

After the mouse is clicked inside of the input field with text “GeeksforGeeks”-

My Personal Notes

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