SOURCE

new Vue({
    el: '#app',
    template: `
    <van-cell-group>
        <van-field v-model="value" label="文本" placeholder="请输入用户名" clearable/>
    </van-cell-group>`,
    data () {
        return {
            value: 'Demo'
        }
    }
});
Vue.use(vant.Lazyload);

<div id="app"></div>