App.vue

<template>
  <div id="app">
    <base-nav-bar :navBarTitle="currentTitle" />
    <router-view />
  </div>
</template>

<script>
import BaseNavBar from "./components/BaseNavBar.vue";
export default {
  components: {
    BaseNavBar
  },
  data() {
    return {
      currentTitle: ""
    };
  },
  watch: {
    $route(val) {
      this.currentTitle = val.meta.title;
    }
  },
  created() {
    console.log("router", this.$router);
    // this.currentTitle = this.$router.currentRoute.meta.title;
  }
};
</script>

<style lang="scss">
body {
  font-size: 16px;
  font-family: "PingFang-SC-Medium";
  background: #f8f8f8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
</style>