Vuex - state management pattern in Vue applications
In Vue applications, multiple components often need to share state. The traditional way is that Props transfer data from parent components to child components. This method works well in simple applications. But when the application becomes very complex, with a nested component tree containing dozens of components, it is difficult to ensure that data can be accurately passed to each descendant component. At this time, Vuex comes in handy!
Vuex is a state management pattern developed specifically for Vue.js applications. It uses a centralized storage to manage the state of all components of the application, and uses corresponding rules to ensure that the state changes in a predictable manner.
The main problems Vuex solves are:
1. Communication between components
Vuex enables remote components to continue to communicate, all data is stored centrally in the Store, and any component can change the state in the store and trigger view updates.
2. Code debugging
Finding bugs becomes easier as the flow of data becomes clear and traceable.
3. State Sharing
The state of state in Vuex can be shared among all components, which ensures the consistency of the project.
The workflow of Vuex:
1. Define state: used to store state, similar to data in components.
2. Define mutations: used to modify the state synchronously, including two parameters state and payload.
3. Define actions: used for asynchronous operations and can contain multiple mutations.
4. Define getters: used to derive some states from state, similar to computed in vue.
5. Use in the component:
- this.$ store.state.xxx read state
- this.$store.commit('mutation name', payload) commit mutation
- this.$store.dispatch('action name', payload) dispatch action
- this.$store.getters.xxx 使用getter
Vuex makes it easier for us to manage the state of the application, so that we can develop Vue applications in a clearer and more transparent way. If your application is complex and contains a lot of components and states, then Vuex is almost essential.