App.vue

<template>
    <div id="app">
        <div id="nav">
            <router-link to="/">Home</router-link>
            |
            <router-link to="/about">About</router-link>
        </div>
        <router-view/>
    </div>
</template>
<script>
import Component, { mixins as Mixin } from 'vue-class-component'
import { withFlagProvider } from 'ld-vue'

@Component
export default class App extends Mixin(
  withFlagProvider({ clientSideId: '57df4354dd79c70721bcb507' }),
) {}
</script>
<style>
#app {
  font-family: 'Avenir', Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
}

#nav {
  padding: 30px;
}

#nav a {
  font-weight: bold;
  color: #2c3e50;
}

#nav a.router-link-exact-active {
  color: #42b983;
}
</style>