How to Display Validation Message for Radio Buttons with Inline Images using Bootstrap 4 ? - GeeksforGeeks

18 Nov, 2021
By Default, Bootstrap 4 has various form features for radio buttons with images inline. Here HTML 5 has default validation features, However, for custom validation, we must use JavaScript or jQuery. The following approaches would help in the display validation message for radio buttons with images inline.Approach 1: First wrap Radio buttons and its label by using form-check-inline class. Then add img tag within the above wrap after label tag. Use default required validation by adding required attribute of radio button. Finally, display message using alert class and trigger it with jQueries attr(), addClass() and html() methods only if radio button not checked. 
Example: The below program illustrates to display validation message for radio buttons with images inline based on the the above approach. 
html
<!DOCTYPE html><html lang="en"> <head>    <meta charset="utf-8">         <meta name="viewport" content=            "width=device-width, initial-scale=1">    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">         <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">    </script>         <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js">    </script>         <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js">    </script>         <style>        body {            text-align: center;        }        h1 {            color: green;        }    </style></head> <body>    <div class="container">        <h1>GeeksforGeeeks</h1>                 <br><br>                  <p>Select Your Gender</p>                  <form>            <div class="form-check form-check-inline">                <input class="form-check-input"                        type="radio"                        name="inlineRadioOptions"                        id="inlineRadio2"                        value="option2" required>                <label class="form-check-label"                                for="inlineRadio2">                    <img id="option2img" src="https://media.geeksforgeeks.org/wp-content/uploads/20200114123932/malelogo.png"                            class="rounded-circle rounded-sm img-fluid img-thumbnail">                </label>            </div>                         <div class="form-check form-check-inline">                <input class="form-check-input"                        type="radio"                        name="inlineRadioOptions"                        id="inlineRadio3"                        value="option3" required>                <label class="form-check-label"                            for="inlineRadio3">                    <img id="option3img" src="https://media.geeksforgeeks.org/wp-content/uploads/20200114123931/femalelogo.png"                            class="rounded-circle rounded-sm img-fluid img-thumbnail">                </label>            </div>            <br>                         <div class="form-check form-check-inline">                <input type="submit"                        class="form-control mt-3 "                        value="Submit"                        name="submit"                        id="checked" />            </div>        </form>                 <br><br>                 <span id="msg"></span>    </div>         <script>             // On clicking submit do following        $("input[type=submit]").click(function() {                         var atLeastOneChecked = false;            $("input[type=radio]").each(function() {                             // If radio button not checked                // display alert message                if ($(this).attr("checked") != "checked") {                                     // Alert message by displaying                    // error message                    $("#msg").html(        "<span class='alert alert-danger' id='error'>"        + "Please Choose atleast one</span>");                }            });        });    </script></body> </html>
Output: 
Approach 2: Wrap the radio buttons along with img tag for inline by using form-inline and input-group class. Then display message using alert class and trigger it with jQuery attr(), addClass() and html() methods only if radio button not checked. Finally, get checked values using jQuery val() function and concatenate it with Bootstrap alert component to display message for successful/failure of form submission. Also, use preventDefault() function to prevent form reset after submission because to display successful/failure message of submission. Don’t forget to add img tag within the above wrap after label tag.Note: Run this code in wider window.Example: The below example illustrates how to display validation message for radio buttons with images inline based on the above approach. 
html
<!DOCTYPE html><html lang="en">  <head>    <meta charset="utf-8">         <meta name="viewport" content=                "width=device-width, initial-scale=1">         <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css">         <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">    </script>         <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js">    </script>         <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js">    </script>      <style>        body {            text-align: center;        }        #option3img {            transform: rotate(270deg);        }                  #option1img {            transform: rotate(180deg);        }        body {            margin: 55px;        }                 input[type=submit] {            position: absolute;            left: 43%;            top: 52%;        }                  h1 {            color: green;        }    </style></head>  <body>    <div class="container">        <h1>GeeksforGeeeks</h1>        <br>                  <p><strong>            Choose the Correct logo for GeeksforGeeks        </strong></p>                  <form>            <div class="form-inline">                                         <!--form group with image inline-->                <div class="input-group mr-sm-2">                    <div class="form-check-inline">                        <label class="form-check-label input-group-text ml-2">                            <input type="radio" aria-label=                                "Radio button for following text input"                                name="Radiobtn" id="option1" value="option1">                                                             <img id="option1img"                                    src="https://media.geeksforgeeks.org/wp-content/uploads/20200108110429/icon4.png"                                    class="bd-placeholder-img rounded-right rounded-sm img-fluid ml-2">                        </label>                    </div>                   </div>                                         <div class="input-group mr-sm-2">                    <div class="form-check-inline">                        <label class="form-check-label input-group-text ">                            <input type="radio"                                aria-label="Radio button for following text input"                                name="Radiobtn" id="option2" value="option2">                                                                  <img id="option2img"                                src="https://media.geeksforgeeks.org/wp-content/uploads/20200108110429/icon4.png"                                         class="bd-placeholder-img rounded-right rounded-sm img-fluid ml-2">                        </label>                    </div>                </div>                                 <div class="input-group mr-sm-2">                    <div class="input-group-prepend">                        <div class="form-check-inline">                            <label class="form-check-label input-group-text ml-2">                                <input type="radio"                                    aria-label="Radio button for following text input"                                    name="Radiobtn" id="option3" value="option3">                                                                          <img id="option3img"                                        src="https://media.geeksforgeeks.org/wp-content/uploads/20200108110429/icon4.png"                                             class=    "bd-placeholder-img rounded-right rounded-sm img-fluid ml-2">                            </label>                        </div>                    </div>                </div>            </div>                                 <div class="form-inline mt-5">                <input class="form-control mr-3 btn btn-info"                        type="submit" value="Submit">            </div>        </form>                 <div class="mt-3" id="msg"></div>        <div class="mt-3" id="ans"></div>    </div>         <script>            // On clicking submit do following        $("input[type=submit]").click(function() {            var atLeastOneChecked = false;                     // If radio button not checked            // display alert message            $("input[type=radio]").each(function() {                if ($(this).attr("checked") != "checked") {                                     // Alert message by displaying                    // error message                    $("#msg").html('<span class="alert alert-danger alert-dismissible fade show" id="alert1">'+'Make atleast one choice'+' <button type="button" class="close" data-dismiss="alert" aria-label="Close">'+'<span aria-hidden="true" >×</span></button></span>');                } else {                    $("#msg").html('<span class="alert alert-success alert-dismissible fade show" id="alert2">'+'Success Choise Made'+'<button type="button" class="close" data-dismiss="alert" aria-label="Close">'+'<span aria-hidden="true" >×</span></button></span>');                }            });        });    </script>     <script>        $(document).ready(function() {                     // Validation message for empty choice submission            $("input[type='submit']").click(function() {                var radioValue = $("input[name='Radiobtn']:checked").val();                                 if (radioValue) {                    $("#msg").html('<span class="alert alert-success alert-dismissible fade show" id="alert3">'+'Success..! You Made your Choise : <strong>' + radioValue + '</strong><button type="button" class="close" data-dismiss="alert" aria-label="Close">'+ '<span aria-hidden="true" >×</span></button></span>');                    if (radioValue == 'option2') {                                            // Validation message for correct choice                        $("#ans").html('<span class="alert alert-success alert-dismissible fade show" id="alert4">'+'You Have Made Correct Choise : <strong>' + radioValue +'</strong><button type="button" class="close" data-dismiss="alert" aria-label="Close">'+'<span aria-hidden="true" >×</span></button></span>');                    } else {                                            // Validation message for wrong choice                        $("#ans").html('<span class="alert alert-warning alert-dismissible fade show" id="alert5">'+'Warning ..! You Have Made Wrong Choise : <strong>' + radioValue +'</strong><button type="button" class="close" data-dismiss="alert" aria-label="Close">'+'<span aria-hidden="true" >×</span></button></span>');                    }                }            });        });            // To avoid form reload after submission//        $("form").submit(function(e) {            e.preventDefault();        });    </script></body>  </html>
Output:  
Reference: https://getbootstrap.com/docs/4.4/components/forms/ 
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