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Reasons for A Default Selection Give people control and align with their expectations (Good): It is better to have a selected radio button by default, given that people cannot deselect and set the button back to its original state once one has been selected. A default selection sets the correct user expectation.
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.
How to check if a radio button is checked?
To find the selected radio button, you use these steps: Select radio buttons by using DOM methods such as querySelectorAll () method. Get the checked property of the radio button. If the checked property is true, the radio button is checked; otherwise, it is not. To know which radio button is checked, you use the value attribute. For example:
Is it possible to unselect a radio button?
You cannot unselect radio buttons. That’s because they’re used if you want the user to select either option1 or option2 or option3 but prohibit selecting multiple values or leaving it empty (e.g. in case of selecting a Gender). See Specification at w3c: when one is switched “on”, all others with the same name are switched “off”.
That’s done by adding the name-attribute: if you wish to give the user the possibility of boxes he can check/uncheck as he likes (e.g. “want to receive our newsletter?”), you should use type=”checkbox”. Radio buttons get their name from the old-style car radios where you physically pushed one of a group of buttons to change the station.
“input type=”radio”> defines a radio button. Radio buttons let a user select ONLY ONE of a limited number of choices” [see Radio Buttons] Following is what I did to resolve the issue. Made sure that the names are distinct for each radio button.