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Using Input Radio checked property: The Input Radio checked property is used to return the checked status of an Input Radio Button. Use document. getElementById(‘id’). checked method to check whether the element with selected id is check or not.
What you should do is set up two variables, both of them serving as boolean flags. Then loop through each set of radio buttons in order to determine if a button has been selected. If so, set the corresponding flag to true, otherwise false. Then at the end, test to see if both flags have been set to true.
Only one radio button in a group can be checked. You have two radio buttons with different names. This means that you have two radio groups, each containing one radio button. You need to put them in the same group (by making them share a name) if you only want one of them to be selected.
How to validate radio button using JavaScript example?
Here Mudassar Ahmed Khan has explained with an example, how to validate RadioButton i.e checked or unchecked using JavaScript. When the Submit Button is clicked, all the RadioButtons in the Group will be referenced and using FOR loop, it will be validated that one RadioButton is checked from the Group of RadioButtons using JavaScript.
Why are radio buttons not checked in HTML?
Indeed, in general, authors are encouraged to avoid having radio button groups that do not have any initially checked controls in the first place, as this is a state that the user cannot return to, and is therefore generally considered a poor user interface. You can use this code snippet
Now I need to make them “required” There are several other required fields in the form and this piece of JavaScript:
How to use the required attribute with a ” radio “?
TL;DR: Set the required attribute for at least one input of the radio group. Setting required for all inputs is more clear, but not necessary (unless dynamically generating radio-buttons). To group radio buttons they must all have the same name value.