How to introduce Vue through CDN and realize value transfer on different pages

In Web development, the popularity of component-based frameworks allows us to develop front-end pages more efficiently and better maintain and manage code. As one of the best, Vue has been used by more and more front-end developers. When using Vue, it is usually necessary to transfer data between different pages. This article will introduce how to introduce Vue through CDN and realize the transfer of data between different pages.

1. Transferring values ​​between different pages

In the development of the Vue framework, we often need to transfer data between different pages. For example: we fill in certain information in page 1 , need to use these data in page 2. This requires implementing cross-page data transfer in Vue.

In the process of transferring data, we can use Vuex, localStorage, sessionStorage, etc. However, when using CDN, Vuex needs to download related library files, and localStorage and sessionStorage only support storage of string types. And when we use localStorage or sessionStorage, we need to serialize and deserialize the data, which is not only troublesome, but also reduces performance. Therefore, this article will introduce a method that does not require downloading other library files and can store various data types.

2. Use the window object

When CDN introduces Vue, we can use the window object to transfer data between different pages. In the Vue framework, we can define a global variable through the Vue prototype object:

Vue.prototype.$global = {}

As shown in the above code, in the Vue prototype object A $global variable is defined. This variable can be used in any component, and the value of this variable will remain in memory until the browser is closed.

Next, we can access this variable through the window object and assign a value to it:

window.$global = { count: 0 }

Using the above code, we A global variable named $global is defined on the window object and assigned the value {count: 0}.

When we need to pass this variable in different pages, we can obtain and modify its value through the window object. For example, we add 1 to the variable value in a component on page 1 and pass this variable value to a component on page 2.

//Page 1
Vue.component('component1', {
template: <button @click="addCount">{{ count }}</button&gt ;,
data() {

return {
  count: window.$global.count
}

},
methods: {

addCount() {
  window.$global.count++
}

}
})

//Page 2
Vue.component('component2', {
template: <span>{{ count }}</span>,
data() {

return {
  count: window.$global.count
}

}
})

In the above code, we add 1 to the count value in the $global variable in the window object in the component of page 1, and in another component of page 2 Get the value of count.

Summary

The above is a way to transfer data between different pages when using CDN to introduce the Vue framework. By defining a global variable in memory through the window object, and accessing and modifying this variable, data transfer between multiple pages can be achieved. This method does not require downloading other library files, does not require serialization and deserialization of data, and supports storing various data types. Of course, this method also has some disadvantages. For example, it is not suitable for data that needs to be updated frequently, because each page needs to re-read the value of the variable, which may cause performance problems.

Finally, it is important to note that since the data is stored in memory, it will be lost after the browser is closed. If you need to store data persistently, please use localStorage or sessionStorage to achieve this.

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