How to do local storage in Vue?

Vue is a popular front-end JavaScript framework that provides many convenient features, including local storage. Local storage refers to storing data in the user's browser so that it can be easily retrieved and used on subsequent visits. This article will introduce how to perform local storage in Vue.

Vue provides a variety of local storage options, including cookies, localStorage and sessionStorage. These options have different uses and limitations and need to be selected based on specific needs when using them.

1. Using cookies for local storage

A cookie is a small text file that is stored on the user's computer. They can be used to store basic information such as user preferences or shopping cart contents. Vue provides a plugin vue-cookies that makes it easy to use cookies to store and retrieve data.

First, you need to install the vue-cookies plug-in in the Vue project. You can use the npm command to install:

npm install vue-cookies --save

After the installation is complete, introduce the vue-cookies plug-in into the Vue instance:

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

Now you can use the $cookies object for cookie storage. Here is an example:

// 存储数据
this.$cookies.set('key', 'value', 1)

// 检索数据
this.$cookies.get('key')

2. Using localStorage for local storage

localStorage is an API that stores data in the user's browser, which can be used when the user closes the browser data is still retained. Vue provides a global object $localStorage that can be used to store and retrieve data.

The following is an example:

// 存储数据
this.$localStorage.set('key', 'value')

// 检索数据
this.$localStorage.get('key')

localStorage can store larger data sizes, but each domain name can only store 5MB of data. Therefore, care should be taken not to exceed the limit when storing large amounts of data.

3. Use sessionStorage for local storage

sessionStorage is similar to localStorage. They are both APIs that store data in the user's browser. The difference is that sessionStorage is used when the user closes browsing. will be deleted after the server is installed. Vue provides a global object $sessionStorage, which can be used to store and retrieve data.

The following is an example:

// 存储数据
this.$sessionStorage.set('key', 'value')

// 检索数据
this.$sessionStorage.get('key')

sessionStorage can also store larger data sizes, but each domain name can only store 5MB of data. Therefore, care should be taken not to exceed the limit when storing large amounts of data.

Summary

Vue provides a variety of local storage options, including cookies, localStorage and sessionStorage, which can be selected according to specific needs. When using, you should pay attention to the data size and limit that each option can store, and use it wisely to avoid exceeding the limit. Local storage can be easily done by using the global objects $cookies, $localStorage and $sessionStorage provided by Vue.

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