const newRadio = document.createElement("input"); newRadio.type = "radio"; newRadio.name = "choice"; newRadio.value = "Option 3"; newRadio.id = "radio3"; const label = document.createElement("label"); label.htmlFor = "radio3"; label.innerText = "Option 3"; document.getElementById("myForm").appendChild(newRadio); document.getElementById("myForm").appendChild(label); Use code with caution. Copied to clipboard 4. Key Attributes for Radio Buttons HTML attribute value - MDN Web Docs

You can use the DOM Selector API to find which radio button is currently checked.

This is the most modern and concise method. javascript

Radio buttons are defined using the tag with type="radio" . To group them (so only one can be selected at a time), they must share the same name attribute.