mixins is wrong

[cshenger]

The mixins here don't need

const app = new Vue({
    el: '#app',
    template: '<router-view></router-view>',
    router,
    mixins: [VueRouter], // No need
});

[TTtuntuntutu]

Yeah, after I removed the mixin, index.html displayed normally. And many packages seemed to be very old!