如何仅在关闭浏览器（VueJs）后清理 localeStorage？答案

【问题标题】：How to clean localeStorage only after closing the browser (VueJs)?如何仅在关闭浏览器（VueJs）后清理 localeStorage？
【发布时间】：2020-09-15 06:53:50
【问题描述】：

问题是：“如何仅在关闭浏览器（而不是关闭浏览器选项卡并重新加载页面）后清理 localeStorage。这必须在 Vue 组件中实现。找到以下解决方案（Clear localStorage on tab/browser close but not on refresh）：

window.onbeforeunload = function (e) {
    window.onunload = function () {
            window.localStorage.isMySessionActive = "false";
    }
    return undefined;
};

window.onload = function () {
            window.localStorage.isMySessionActive = "true";
};

但我不明白如何正确以及在哪里调用这些侦听器。

【问题讨论】：

标签： vue.js events vuejs2 vue-component

【解决方案1】：

您可以在main.js 文件或App.vue 文件中简单地注册您的听众

main.js

import Vue from "vue";
import App from "./App.vue";

Vue.config.productionTip = false;

new Vue({
  beforeMount() {
    window.addEventListener("load", this.onLoad);
    window.addEventListener("beforeunload", this.onUnload);
  },
  beforeDestroy() {
    window.removeEventListener("load", this.onLoad);
    window.removeEventListener("beforeunload", this.onUnload);
  },
  methods: {
    onLoad(event) {
      window.localStorage.setItem("isMySessionActive", true);
    },
    onUnload(event) {
      window.localStorage.setItem("isMySessionActive", false);
    }
  },
  render: (h) => h(App)
}).$mount("#app");

App.vue

<template>
  <div id="app">
    <img alt="Vue logo" src="./assets/logo.png" width="25%">
    <HelloWorld msg="Hello World!"/>
  </div>
</template>

<script>
import HelloWorld from "./components/HelloWorld";

export default {
  name: "App",
  components: {
    HelloWorld
  },
  beforeMount() {
    window.addEventListener("load", this.onLoad);
    window.addEventListener("beforeunload", this.onUnload);
  },
  beforeDestroy() {
    window.removeEventListener("load", this.onLoad);
    window.removeEventListener("beforeunload", this.onUnload);
  },
  methods: {
    onLoad(event) {
      window.localStorage.setItem("isMySessionActive", true);
    },
    onUnload(event) {
      window.localStorage.setItem("isMySessionActive", false);
    }
  }
};
</script>

<style>
#app {
  font-family: "Avenir", Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-align: center;
  color: #2c3e50;
  margin-top: 60px;
}
</style>

【讨论】：

感谢您的回答，无论是否有效，我都会尽快添加）