Radio checked JS

1. How to make a radio button checked in JavaScript?
2. How do you check a radio button?
3. How to check multiple radio button in JavaScript?

How to make a radio button checked in JavaScript?

getElementById('id'). checked method to check whether the element with selected id is check or not. If it is checked then display its corresponding result otherwise check the next statement. If no one radio button is selected then it returns 'No one selected'.

How do you check a radio button?

You can check a radio button by default by adding the checked HTML attribute to the <input> element. You can disable a radio button by adding the disabled HTML attribute to both the <label> and the <input> .

How to check multiple radio button in JavaScript?

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.