redux-class-action v1.0.1

Redux class action

This module lets you declare actions using classes, where the type string of the actions is equivalent to the class's constructor name. More importantly, the module has a facility for handling those actions in a type-safe way while allowing types to be inferred. All together, this lets you use redux actions without any code duplication, and with as little boilerplate as possible.

Here's an example of a super simple reducer:

import { Action, startingFrom } from "redux-class-action";

export class Add extends Action {
    constructor(public readonly amount: number) {
        super();
    }
}

export class Reset extends Action { }

export const counter = 
    startingFrom({ counter: 10 })
        .when(Add, (state, action) => { counter: state.counter + action.amount })
        .when(Reset, (state, action) => { counter: 0 })
        .done;

Every function parameter in the reducer is typed as expected. The system figures out the type expected via the first parameter, the class constructor, which also gives the runtime enough information to know the action's type (the constructor's name).

Redux doesn't allow actions to be anything other than plain records, so this libary also provides the classMiddleware to strip away the class information.