动作的 Context 参数（Vue.js前端应用开发实践）

View store actions support a parameter like text x.
You can inspect this parameter to see its contents.
In the gts name action, you can output its context to the console and check it in the browser's console.
The context parameter contains a commit method, which is used to commit mutations to modify store data.
There is also a dispatch method to dispatch other actions within the store.
Inside the store, there are getters (like one called name) and root getters for accessing the store's data.
When stores are modular, each module may have its own state and getters.
rules state represents the combined state of all store modules.
The state referred to at the end is the current module's state.
If you only want to use some parts of the context in an action, you can destructure it into an object.
By adding commit to the object, you can directly use the commit method within the action.

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