get radio button value javascript
document.querySelector('input[name="rate"]:checked').value;
get radio button value javascript
document.querySelector('input[name="rate"]:checked').value;
radio button set value in javascript
//must have a condition to select a value and
//then get the element of that value individually to set it to checked.
//-you can take the value in var or get it from an object for ex.
<div class="form-check">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="Gender" id="male" value="Male">
Male
</label>
<label class="form-check-label">
<input type="radio" class="form-check-input" name="Gender" id="female" value="Female">
Female
</label>
</div>
var targetOption='male'
if(targetOption=='female') document.getElementById("female").checked=true;
if(targetOption=='male') document.getElementById("male").checked=true;
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