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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:
First, we need to use npm to install Vuex: npm install vuex --save
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: '578d07aa9e36ca6b43806c9706879c6d',
components: { App }
})
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.
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.
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:
163be9d00220f7d75b178fb6f4dc4c83Increment65281c5ac262bf6d81768915a4a77ac0
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:
e388a4556c0f65e1904146cc1a846bee{{ $store.state.count }}94b3e26ee717c64999d7867364b1b4a3
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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