CSS | :required Selector

The required selector is used to select the required element with the required attribute and set the CSS property. Required attributes of Form elements are defined as required.

Note: This selector is used with form elements, eg. <input>, <select> and <textarea>.

Syntax:

:required {
    // CSS Property
}

Example:

<!DOCTYPE html> 
<html> 
    <head> 
        <title>:required Selector</title> 
        <style>          
            h1 { 
                color: green; 
            } 
            body { 
                text-align:center; 
            } 
            input:required { 
                background-color: green; 
                color: white; 
            } 
            form div { 
                padding: 10px; 
            } 
            label { 
                display: block; 
                font-size: 18px; 
            } 
            input { 
                border: 1px solid black; 
                padding: 9px; 
                font-size: 18px; 
            } 
        </style> 
    </head> 
    <body> 
        <h1>GeeksforGeeks</h1> 
        <h2>:required selector</h2> 
        <form> 
            <div> 
                <label for="name">Name</label> 
                <input type="text" name="name" id="name"/> 
            </div> 
            <div> 
                <label for="email">Email</label> 
                <input type="email" name="email" id="email" required /> 
            </div> 
            <div> 
                <input type="submit" value="Submit" /> 
            </div> 
        </form>  
    </body> 
</html>                     

Output:
required

Supported Browsers: The browser supported by :required Selector are listed below:

Apple Safari 5.0
Google Chrome 10.0
Firefox 4.0
Opera 10.0
Internet Explorer 10.0

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