Implementation steps of global state management function in Vue documentation

Vue.js is a popular JavaScript framework with powerful data binding and componentization capabilities. In Vue.js, global state management is a very important task, which allows different components to share data and maintain data consistency. This article will introduce the steps to implement the global state management function in the Vue.js document.

In Vue.js, global state management is usually implemented using the Vuex library. Vuex is a state management model specially designed for Vue.js. It allows us to easily manage the data layer and avoid data interaction between components.

The implementation steps are as follows:

1. Install Vuex

First, we need to use npm to install Vuex: npm install vuex --save

2. Create store

In Vue.js, store is a place used to store state and data. We need to create a new store in main.js and pass it the Vue instance.

import Vue from 'vue'
import Vuex from 'vuex'

Vue.use(Vuex)

const store = new Vuex.Store({
state: {

count: 0

},
mutations: {

increment(state) {
  state.count++
}

}
})

new Vue({
el: '#app ',
store,
template: '',
components: { App }
})

3. Set status

We can use state objects to store data. In the above example, we set up a state called count and set its initial value to 0. When we need to change the state, we need to call mutation to change the state.

4. Writing mutations

Mutation is the only place where state can be changed. We must update the state through mutations rather than directly changing the values ​​in the state. Doing this helps us keep track of state changes.

In the above example, we wrote a mutation named increment that can increase the value of count.

5. Call mutation

When we need to change the state, we need to call mutation. We can call mutation using this.$store.commit(mutationName).

Example of calling mutation in component:

methods: {
increment() {

this.$store.commit('increment')

}
}

In template Example of calling mutation in:

Increment

6. Get status

To get the state, we can use this.$store.state.stateName.

Example of getting status in component:

computed: {
count() {

return this.$store.state.count

}
}

In template Example of getting status in:

{{ $store.state.count }}

Summary:

By creating store, setting Status, writing mutations, calling mutations, and getting status, we can implement global status management in Vue.js. Vuex can not only be used to manage simple data, but can also be used to deal with complex application scenarios, such as asynchronous operations, data caching, modularization, etc. I hope this article can help beginners better understand the implementation steps of Vuex.

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