An article to talk about the usage of session data in Vue.js

Vue.js is a popular JavaScript framework that has many features, one of which is handling session data in web applications. Vue.js provides options that help you manage user logins and logouts and save user sessions between different routes. In this article, we will introduce the usage of session data in Vue.js.

1. Overview of Sessions in Vue.js

Sessions are a mechanism in web applications that help save the user's state and data on the server. In a Vue.js application, we can take advantage of the browser's local storage feature to save session data to the user's local computer. This is usually achieved through the use of cookies, sessionStorage and localStorage.

2. Using Cookies

Cookies are data exchanged between a web browser and a web server. Cookies in Vue.js are saved as strings in the browser's local storage and sent to the server on every HTTP request. Vue.js provides a plug-in called vue-cookies, which can help us handle cookies.

First, we need to install vue-cookies:

npm install vue-cookies --save

Next, we can import and use vue-cookies in the main.js file of the Vue.js application:

import VueCookies from 'vue-cookies'
Vue.use(VueCookies)

In the component, we can use the VueCookies object to set, get and delete cookies:

export default {
  data () {
    return {
      cookieKey: 'my-cookie-key',
      cookieValue: 'my-cookie-value'
    }
  },
  methods: {
    setCookie () {
      this.$cookies.set(
        this.cookieKey,
        this.cookieValue
      )
    },
    getCookie () {
      this.$cookies.get(
        this.cookieKey
      )
    },
    deleteCookie () {
      this.$cookies.delete(
        this.cookieKey
      )
    }
  }
}

In the above code, we use the $cookies object to set, get and delete cookies.

3. Using sessionStorage

sessionStorage is a local storage mechanism provided by the browser, which allows us to save data to the current session. This means that the stored data will be deleted when the user closes the browser tab or browser window. In Vue.js applications, we can use vue-session plugin to handle sessionStorage.

First, we need to install the vue-session plug-in:

npm install vue-session --save

Next, import and use vue-session in the main.js file:

import VueSession from 'vue-session'
Vue.use(VueSession)

In the component, We can use the $session object to set, get and delete session data:

export default {
  data () {
    return {
      sessionKey: 'my-session-key',
      sessionValue: 'my-session-value'
    }
  },
  methods: {
    setSession () {
      this.$session.set(
        this.sessionKey,
        this.sessionValue
      )
    },
    getSession () {
      this.$session.get(
        this.sessionKey
      )
    },
    deleteSession () {
      this.$session.delete(
        this.sessionKey
      )
    }
  }
}

In the above code, we use the $session object to set, get and delete session data.

4. Using localStorage

localStorage is a local storage mechanism provided by the browser, which allows us to save data to the browser. Unlike sessionStorage, data stored in localStorage will persist even if the user closes the browser tab or browser window. In Vue.js applications, we can use the vue-localstorage plugin to handle localStorage.

First, we need to install the vue-localstorage plug-in:

npm install vue-localstorage --save

Next, import and use vue-localstorage in main.js:

import VueLocalStorage from 'vue-localstorage'
Vue.use(VueLocalStorage)

In the component, we You can use the $localStorage object to set, get and delete data in localStorage:

export default {
  data () {
    return {
      localStorageKey: 'my-localstorage-key',
      localStorageValue: 'my-localstorage-value'
    }
  },
  methods: {
    setLocalStorage () {
      this.$localStorage.set(
        this.localStorageKey,
        this.localStorageValue
      )
    },
    getLocalStorage () {
      this.$localStorage.get(
        this.localStorageKey
      )
    },
    deleteLocalStorage () {
      this.$localStorage.remove(
        this.localStorageKey
      )
    }
  }
}

In the above code, we use the $localStorage object to set, get and delete data in localStorage.

Summary:

In Vue.js applications, we can use cookies, sessionStorage and localStorage to handle session data. Vue.js provides many plugins to help us handle this data and provides simple APIs to set, get and delete session data. If you need to handle user logins, cookies, OAuth, etc., these tools will be your great help.

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