Waiting for a radio button selection to be made

Question

Waiting for a radio button selection to be made

I am working on a submission form that needs to have at least one radio button selected. In my code, I am able to retrieve the value of the selected radio button:

let myQuery = document.querySelector('input[name="#myName"]:checked').value;

If this value is returned (which is a string of text), can I proceed with the following:

document.getElementById("#ButtonID").removeAttribute("disabled");

Currently, my submit button is disabled, but by removing the attribute, users are able to submit their form after selecting a radio button.

How can I incorporate this into the querySelector? I already have a set of variables extracted from the .value for the selected radio button.

Thank you for your assistance :)

javascript twitter-bootstrap radio-button

Answer 1

Answer №1

Assuming you haven't provided your HTML template, here is a possible example:

let input = document.querySelector('input[name="Name"]');

input.addEventListener("change", () => {
 console.log(input.value)
 document.getElementById("ButtonId").removeAttribute("disabled");
});

<form>
  <p>Please click on the Name:</p>
  <fieldset>
    <input type="radio" name="Name" value="Name">
    <label for="Name"> Name</label> 
  </fieldset>
  
  <button id="ButtonId" disabled>
    Submit
  </button>
</form>

If you are looking for information on how to use addEventListener, check out this link.

Answer 2

Assuming you haven't provided your HTML template, here is a possible example:

let input = document.querySelector('input[name="Name"]');

input.addEventListener("change", () => {
 console.log(input.value)
 document.getElementById("ButtonId").removeAttribute("disabled");
});

<form>
  <p>Please click on the Name:</p>
  <fieldset>
    <input type="radio" name="Name" value="Name">
    <label for="Name"> Name</label> 
  </fieldset>
  
  <button id="ButtonId" disabled>
    Submit
  </button>
</form>

If you are looking for information on how to use addEventListener, check out this link.

Answer 3

Answer №2

Expanding on previous responses, a form can be created where no radio buttons are selected by default but a selection is required for form submission:

The HTML structure:

<h1>test form</h1>
<form>
  <div>
    <label>
      <input type="radio" name="a-radio-group" value="first" />
      first
    </label>
    <label>
      <input type="radio" name="a-radio-group" value="second" />
      second
    </label>
    <label> 
      <input type="radio" name="a-radio-group" value="third" />
      third
    </label>
  </div>
  <div>
    <button id="button" disabled>submit</button>
  </div>
</form>

The JavaScript logic:


document.querySelector('form')
  .addEventListener('click', 
    function(event) {
      const checkedRadioInputs =
        document.querySelectorAll('input[name="a-radio-group"]:checked');

        if(checkedRadioInputs.length) {
          document
            .querySelector('button')
            .removeAttribute('disabled');
        }
    }
  );

While some aspects may already be implemented, let's focus on three key points:

Radio buttons should have the same 'name' attribute within a group to function correctly. This ensures that selecting one option deselects others. Explore more about radio buttons.
By attaching a 'click' listener to the form element, changes in the entire form can be monitored. Using this approach simplifies tracking compared to adding onChange handlers to individual radio inputs.
Utilizing querySelectorAll returns an array, enabling easy testing based on the array's length: absence of selection is indicated by a length of 0. Discover further details on querySelectorAll.

Answer 4

Expanding on previous responses, a form can be created where no radio buttons are selected by default but a selection is required for form submission:

The HTML structure:

<h1>test form</h1>
<form>
  <div>
    <label>
      <input type="radio" name="a-radio-group" value="first" />
      first
    </label>
    <label>
      <input type="radio" name="a-radio-group" value="second" />
      second
    </label>
    <label> 
      <input type="radio" name="a-radio-group" value="third" />
      third
    </label>
  </div>
  <div>
    <button id="button" disabled>submit</button>
  </div>
</form>

The JavaScript logic:


document.querySelector('form')
  .addEventListener('click', 
    function(event) {
      const checkedRadioInputs =
        document.querySelectorAll('input[name="a-radio-group"]:checked');

        if(checkedRadioInputs.length) {
          document
            .querySelector('button')
            .removeAttribute('disabled');
        }
    }
  );

While some aspects may already be implemented, let's focus on three key points:

Radio buttons should have the same 'name' attribute within a group to function correctly. This ensures that selecting one option deselects others. Explore more about radio buttons.
By attaching a 'click' listener to the form element, changes in the entire form can be monitored. Using this approach simplifies tracking compared to adding onChange handlers to individual radio inputs.
Utilizing querySelectorAll returns an array, enabling easy testing based on the array's length: absence of selection is indicated by a length of 0. Discover further details on querySelectorAll.

Answer 5

Answer №3

Typically, when using radio buttons, we often select one button by default. However, if you want the radio button to remain unselected initially, you can achieve this with the following code:

function hello() {
            // body...
            let button1 = document.getElementsByName("a").checked;
            console.log(button1); 

            document.getElementById("gn").disabled=false; 
             }

<form>
                <input type="radio" value="a" name="a" onclick="hello()">daknd<br>
                <input type="radio" value="b" name="a" onclick="hello()">hmm
                
                <button id="gn" type="submit" disabled>hmm</button>
            </form>

Answer 6

Typically, when using radio buttons, we often select one button by default. However, if you want the radio button to remain unselected initially, you can achieve this with the following code:

function hello() {
            // body...
            let button1 = document.getElementsByName("a").checked;
            console.log(button1); 

            document.getElementById("gn").disabled=false; 
             }

<form>
                <input type="radio" value="a" name="a" onclick="hello()">daknd<br>
                <input type="radio" value="b" name="a" onclick="hello()">hmm
                
                <button id="gn" type="submit" disabled>hmm</button>
            </form>

Answer 7

Answer №4

Your code seems correct, but there is a mistake in using '#' within the getElementById() method. Remember that while jQuery requires the '#' sign, in vanilla JavaScript, you only need to provide the ID name.

document.getElementById("ButtonID").removeAttribute("disabled");

<script>

function checkStatus(obj)
{
  
  if(obj.value != "")
  {
     document.getElementById("button").removeAttribute("disabled");
  }
}

</script>


<form id="" name="" action="" method="">

       <li><input type="radio" name="a" id="RAD_1" value="RAD_1" 
       onclick="checkStatus(this);">Hello 1</input></li>

       <li><input type="radio" name="a" id="RAD_2" value="RAD_2" 
      onclick="checkStatus(this);">Hello 2</input></li>

      <li><input type="submit" name="submit" id="button" value="Submit" disabled> 
</input>
</form>

Answer 8

Your code seems correct, but there is a mistake in using '#' within the getElementById() method. Remember that while jQuery requires the '#' sign, in vanilla JavaScript, you only need to provide the ID name.

document.getElementById("ButtonID").removeAttribute("disabled");

<script>

function checkStatus(obj)
{
  
  if(obj.value != "")
  {
     document.getElementById("button").removeAttribute("disabled");
  }
}

</script>


<form id="" name="" action="" method="">

       <li><input type="radio" name="a" id="RAD_1" value="RAD_1" 
       onclick="checkStatus(this);">Hello 1</input></li>

       <li><input type="radio" name="a" id="RAD_2" value="RAD_2" 
      onclick="checkStatus(this);">Hello 2</input></li>

      <li><input type="submit" name="submit" id="button" value="Submit" disabled> 
</input>
</form>

Waiting for a radio button selection to be made

Answer №1

Answer №2

Answer №3

Answer №4

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