带值的单选选项默认检查

Question

I have a radio option list as shown below. I want the first option to be selected by default on first render, but it is not giving the desired output:

<label class="radio normalFontWeight">
                <input type="radio" name="Criteria" data-ng-value="EVERYONE_REVIEWED" data-ng-model="stage.completionRule" checked="checked"> 
                option 1
</label>                                              
<label class="radio normalFontWeight">
                    <input type="radio" name="Criteria" data-ng-value="HAS_MIN_REVIEWS" data-ng-model="stage.completionRule"> 
                    option 2
    </label>

i have tried with both checked="checked" && checked but was not successful, as on first render both of the options r unselected

Answer 1

I have figured out the problem: The ng-model value needs to be initialized with corresponding input value of radio button to be checked by default ie in my case stage.completionRule = "EVERYONE_REVIEWED"