JavaScript | Focus()

JavaScript focus method is used to give focus to a html element. It sets the element as the active element in the current document. It can be applied to one html element at a single time in a current document. The element can either be a button or a text field or a window etc. It is supported by all the browsers.
Syntax:

HTMLElementObject.focus()

Parameters: It does not accept any parameters.
Return Value: This method does not return any value.

JavaScript code to show the working of this function:

Code:
Focuses on an input field on hovering over that field.

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<html>
  
<head>
    <script type="text/javascript">
        function myFunction() {
            document.getElementById("focus").focus();
        }
    </script>
</head>
  
<body>
    <form action="#">
        <br>
        <br>
        <label>
            Hover me: </label>
        <input type="text" onmousemove=myFunction() id="focus">
        
        <!-- onmousemove is an event which occurs when somenone 
        hovers the mouse on that particular element and calls 
        the function of javascript -->
        <br>
        <br>
        <label>Without Focus: </label>
        <input type="text">
        <br>
        <br>
        <input type="button" value="submit">
    </form>
</body>
</html>

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Output:



Focus field can be removed with the help of blur() method in javascript.

Syntax:


HTMLElementObject.blur()


Parameters: This method does not accept any parameter.

Illustration of blur method on clicking a field:

Code:











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<html> 


  


<head> 


    <script type="text/javascript"> 


        function setFocus() { 


            document.getElementById("focus").focus(); 


        } 


  


        function removeFocus() { 


            document.getElementById("focus").blur(); 


        } 


    </script> 


</head> 


  


<body> 


    <input type="button" onclick="setFocus()" value="set focus"> 


    <input type="button" onclick="removeFocus()" value="remove focus"> 


    <br> 


    <br> 


    <input type="text" id="focus"> 


</body> 


  


</html> 



















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Output:

After clicking on set focus-



After clicking on remove focus-




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