HTML | DOM onfocus Event

The HTML DOM onfocus event occurs when an element gets focus. The onfocus event is mostly used with <input>, <select>, and <a>. The onfocus event is the opposite of the onblur event.

The HTML DOM onfocus event support all HTML tag EXCEPT:

<base>
<bdo>
<br>
<head>
<html>
<iframe>
<meta>
<param>
<script>
<style>
<title>

Syntax:

In HTML:
```
<element onfocus="myScript">
```
In JavaScript:
```
object.onfocus = function(){myScript};
```
In JavaScript, using the addEventListener() method:
```
object.addEventListener("focus", myScript);
```

Note: The onfocus event different from onfocusin event, because the onfocus event does not bubble.

Example 1:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
      HTML DOM onfocus Event 
  </title> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green"> 
          GeeksforGeeks 
      </h1> 
        <h2> 
          HTML DOM onfocus Event 
      </h2> 
        <br> Name: 
        <input type="text" 
               onfocus="geekfun(this)"> 
        <script> 
            function geekfun(gfg) { 
                gfg.style.background = "green"; 
            } 
        </script> 
  </center> 
</body> 
  
</html> 

Output:

Example 2:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
      HTML DOM onfocus Event 
  </title> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green"> 
          GeeksforGeeks 
      </h1> 
        <h2>HTML DOM onfocus Event</h2> 
        <br> Name: 
        <input type="text" id="fname"> 
  
        <script> 
            document.getElementById( 
              "fname").onfocus = function() { 
                geekfun() 
            }; 
  
            function geekfun() { 
                document.getElementById( 
                  "fname").style.backgroundColor = 
                  "green"; 
            } 
        </script> 
    </center> 
</body> 
  
</html> 

Output

Example 3:

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
      HTML DOM onfocus Event 
  </title> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green"> 
          GeeksforGeeks 
      </h1> 
        <h2>HTML DOM onfocus Event</h2> 
        <br> Name: 
        <input type="text" id="fname"> 
  
        <script> 
            document.getElementById( 
              "fname").addEventListener( 
              "focus", Geeksfun); 
  
            function Geeksfun() { 
                document.getElementById( 
                  "fname").style.backgroundColor = "green"; 
            } 
        </script> 
    </center> 
</body> 
  
</html> 

Output:

Supported Browsers: The browsers supported by HTML DOM onfocus Event are listed below:

Google Chrome
Internet Explorer
Firefox
Apple Safari
Opera

My Personal Notes

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