How to solve the problem 'Error: [vuex] unknown action type: xxx' when using vuex in a Vue application?

In Vue.js projects, vuex is a very useful state management tool. It helps us share state among multiple components and provides a reliable way to manage state changes. But when using vuex, sometimes you will encounter the error "Error: [vuex] unknown action type: xxx". This article will explain the cause and solution of this error.

1. Error reason

When using vuex, we need to define some actions and mutations to change the state of the application. When we distribute an action in a component, if the action is not defined correctly or is spelled incorrectly, the error "Error: [vuex] unknown action type: xxx" will appear. Likewise, if we try to use an undefined mutation type in a mutation, we will get a similar error message.

The following is a sample code that contains code for defining and calling an action. If the action type is not defined correctly, an error will occur.

// 定义action
const actions = {
  incrementCounter({ commit }, payload) {
    commit('INCREMENT_COUNTER', payload)
  }
}

// 调用action
this.$store.dispatch('incrementCount', 10)

In the above code, we try to use the action type named "incrementCount" to update the status. However, what we actually define is an action called "incrementCounter". Therefore, the type name in the call should be corrected to "incrementCounter".

2. Solution

When the error message "Error: [vuex] unknown action type: xxx" appears, we need to carefully check our code to ensure that all action and mutation type names are are defined and used correctly. Here are some methods that may help resolve the issue.

(1) Check the spelling and case of action and mutation type names.

(2) When calling action or mutation, ensure that all required parameters are passed correctly.

(3) Use the auxiliary function provided by vuex to trigger action or mutation, so as to avoid spelling errors.

For the above example, we only need to correct the type name in the call to avoid the error.

// 正确调用action
this.$store.dispatch('incrementCounter', 10)

If you still encounter errors, you can check the console output in the developer console debugger to see if they provide more detailed error information.

In this article, we explain why “Error: [vuex] unknown action type: xxx” error occurs when using vuex in a Vue.js application. We've covered possible causes of this error and provided some workarounds. When using Vuex, memorizing common mistakes can avoid wasting time and debug more efficiently.

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