How to get value of selected radio button using JavaScript?

20 Jul, 2021
To get the value of selected radio button, a user-defined function can be created that gets all the radio buttons with the name attribute and finds the radio button selected using the checked property. The checked property returns True if the radio button is selected and False otherwise. If there are multiple Radio buttons in a webpage, first, all the input tags are fetched and then the values of all the tags that have type as ‘radio’ and are selected are displayed.
Example 1: The following program displays the value of selected radio button when user clicks on Submit button.
<!DOCTYPE html><html>  <head>    <title>        Get value of selected        radio button    </title></head>  <body>    <p>        Select a radio button and click on Submit.    </p>          Gender:    <input type="radio" name="gender" value="Male">Male    <input type="radio" name="gender" value="Female">Female    <input type="radio" name="gender" value="Others">Others          <br>          <button type="button" onclick="displayRadioValue()">        Submit    </button>          <br>          <div id="result"></div>          <script>        function displayRadioValue() {            var ele = document.getElementsByName('gender');                          for(i = 0; i < ele.length; i++) {                if(ele[i].checked)                document.getElementById("result").innerHTML                        = "Gender: "+ele[i].value;            }        }    </script></body></html>                    
Output :
Example 2: The following program displays values of all the selected radio buttons when submit is clicked.
<!DOCTYPE html><html>  <head>    <title>        Get value of selected radio button    </title></head>  <body>    <p>        Select a radio button and click on Submit.    </p>          Gender:    <input type="radio" name="Gender" value="Male">Male    <input type="radio" name="Gender" value="Female">Female    <input type="radio" name="Gender" value="Others">Others          <br>          Food Preference:    <input type="radio" name="Food" value="Vegetarian">Vegetarian    <input type="radio" name="Food" value="Non-Vegetarian">Non-Vegetarian          <br>          <button type="button" onclick="displayRadioValue()">        Submit    </button>          <br>          <div id="result"></div>          <script>        function displayRadioValue() {            document.getElementById("result").innerHTML = "";            var ele = document.getElementsByTagName('input');                          for(i = 0; i < ele.length; i++) {                                  if(ele[i].type="radio") {                                      if(ele[i].checked)                        document.getElementById("result").innerHTML                                += ele[i].name + " Value: "                                + ele[i].value + "<br>";                }            }        }    </script></body>  </html>                    
Output:
JavaScript is best known for web page development but it is also used in a variety of non-browser environments. You can learn JavaScript from the ground up by following this JavaScript Tutorial and JavaScript Examples.
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