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75 lines
2.7 KiB
Plaintext
75 lines
2.7 KiB
Plaintext
/**
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* An *action* is a plain object that represents an intention to change the
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* state. Actions are the only way to get data into the store. Any data,
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* whether from UI events, network callbacks, or other sources such as
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* WebSockets needs to eventually be dispatched as actions.
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*
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* Actions must have a `type` field that indicates the type of action being
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* performed. Types can be defined as constants and imported from another
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* module. These must be strings, as strings are serializable.
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*
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* Other than `type`, the structure of an action object is really up to you.
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* If you're interested, check out Flux Standard Action for recommendations on
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* how actions should be constructed.
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*
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* @template T the type of the action's `type` tag.
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*/
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// this needs to be a type, not an interface
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// https://github.com/microsoft/TypeScript/issues/15300
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export type Action<T extends string = string> = {
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type: T
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}
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/**
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* An Action type which accepts any other properties.
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* This is mainly for the use of the `Reducer` type.
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* This is not part of `Action` itself to prevent types that extend `Action` from
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* having an index signature.
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*/
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export interface UnknownAction extends Action {
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// Allows any extra properties to be defined in an action.
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[extraProps: string]: unknown
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}
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/**
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* An Action type which accepts any other properties.
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* This is mainly for the use of the `Reducer` type.
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* This is not part of `Action` itself to prevent types that extend `Action` from
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* having an index signature.
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* @deprecated use Action or UnknownAction instead
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*/
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export interface AnyAction extends Action {
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// Allows any extra properties to be defined in an action.
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[extraProps: string]: any
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}
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/* action creators */
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/**
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* An *action creator* is, quite simply, a function that creates an action. Do
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* not confuse the two terms—again, an action is a payload of information, and
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* an action creator is a factory that creates an action.
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*
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* Calling an action creator only produces an action, but does not dispatch
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* it. You need to call the store's `dispatch` function to actually cause the
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* mutation. Sometimes we say *bound action creators* to mean functions that
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* call an action creator and immediately dispatch its result to a specific
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* store instance.
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*
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* If an action creator needs to read the current state, perform an API call,
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* or cause a side effect, like a routing transition, it should return an
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* async action instead of an action.
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*
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* @template A Returned action type.
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*/
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export interface ActionCreator<A, P extends any[] = any[]> {
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(...args: P): A
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}
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/**
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* Object whose values are action creator functions.
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*/
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export interface ActionCreatorsMapObject<A = any, P extends any[] = any[]> {
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[key: string]: ActionCreator<A, P>
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}
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