~~~ <input type="radio" id="one" value="One" v-model="picked"> <label for="one">One</label> <br> <input type="radio" id="two" value="Two" v-model="picked"> <label for="two">Two</label> <br> <span>Picked: {{ picked }}</span> data: { picked: 'One' } ~~~ 如果不设置默认值的话，就算给了radio：checked，它的状态也不会选中。设置默认值之后radio就不用给checked了。