@chimerast/vuex-module-decorators
v0.10.0
Published
Decorators to make class-like Vuex modules
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Readme
vuex-module-decorators
Detailed Guide: https://championswimmer.in/vuex-module-decorators/
Typescript/ES7 Decorators to make Vuex modules a breeze
CHANGELOG
There are major type-checking changes (could be breaking) in v0.9.7
There are major usage improvements (non backwards compatible) in 0.8.0
Please check CHANGELOG
Examples
Read the rest of the README to figure out how to use, or if you readily want to jump into a production codebase and see how this is used, you can check out -
- https://github.com/Armour/vue-typescript-admin-template
- https://github.com/xieguangcai/vue-order-admin
- https://github.com/coding-blocks-archives/realworld-vue-typescript
Installation
npm install -D vuex-module-decorators
Babel 6/7
NOTE This is not necessary for
vue-cli@3
projects, since@vue/babel-preset-app
already includes this plugin
- You need to install
babel-plugin-transform-decorators
TypeScript
- set
experimentalDecorators
to true - For reduced code with decorators, set
importHelpers: true
intsconfig.json
- (only for TypeScript 2) set
emitHelpers: true
intsconfig.json
Configuration
Using with target: es5
NOTE Since version
0.9.3
we distribute as ES5, so this section is applicable only to v0.9.2 and below
This package generates code in es2015
format. If your Vue project targets ES6 or ES2015 then
you need not do anything. But in case your project uses es5
target (to support old browsers), then
you need to tell Vue CLI / Babel to transpile this package.
// in your vue.config.js
module.exports = {
/* ... other settings */
transpileDependencies: ['vuex-module-decorators']
}
Usage
The conventional old & boring way
Remember how vuex modules used to be made ?
const moduleA = {
state: { ... },
mutations: { ... },
actions: { ... },
getters: { ... }
}
const moduleB = {
state: { ... },
mutations: { ... },
actions: { ... }
}
const store = new Vuex.Store({
modules: {
a: moduleA,
b: moduleB
}
})
Hello Decorators !
Well not anymore. Now you get better syntax. Inspired by vue-class-component
import { Module, VuexModule, Mutation, Action } from 'vuex-module-decorators'
@Module
export default class Counter2 extends VuexModule {
count = 0
@Mutation
increment(delta: number) {
this.count += delta
}
@Mutation
decrement(delta: number) {
this.count -= delta
}
// action 'incr' commits mutation 'increment' when done with return value as payload
@Action({ commit: 'increment' })
incr() {
return 5
}
// action 'decr' commits mutation 'decrement' when done with return value as payload
@Action({ commit: 'decrement' })
decr() {
return 5
}
}
async MutationAction === magic
Want to see something even better ?
import { Module, VuexModule, MutationAction } from 'vuex-module-decorators'
import { ConferencesEntity, EventsEntity } from '@/models/definitions'
@Module
export default class HGAPIModule extends VuexModule {
conferences: Array<ConferencesEntity> = []
events: Array<EventsEntity> = []
// 'events' and 'conferences' are replaced by returned object
// whose shape must be `{events: [...], conferences: [...] }`
@MutationAction({ mutate: ['events', 'conferences'] })
async fetchAll() {
const response: Response = await getJSON('https://hasgeek.github.io/events/api/events.json')
return response
}
}
Automatic getter detection
@Module
class MyModule extends VuexModule {
wheels = 2
@Mutation
incrWheels(extra) {
this.wheels += extra
}
get axles() {
return this.wheels / 2
}
}
this is turned into the equivalent
const module = {
state: { wheels: 2 },
mutations: {
incrWheels(state, extra) {
state.wheels += extra
}
},
getters: {
axles: (state) => state.wheels / 2
}
}
Putting into the store
Use the modules just like you would earlier
import Vue from 'nativescript-vue'
import Vuex, { Module } from 'vuex'
import counter from './modules/Counter2'
import hgapi from './modules/HGAPIModule'
Vue.use(Vuex)
const store = new Vuex.Store({
state: {},
modules: {
counter,
hgapi
}
})
Module re-use, use with NuxtJS
If you need to support module reuse
or to use modules with NuxtJS, you can have a state factory function generated instead
of a staic state object instance by using stateFactory
option to @Module
, like so:
@Module({ stateFactory: true })
class MyModule extends VuexModule {
wheels = 2
@Mutation
incrWheels(extra) {
this.wheels += extra
}
get axles() {
return this.wheels / 2
}
}
this is turned into the equivalent
const module = {
state() {
return { wheels: 2 }
},
mutations: {
incrWheels(state, extra) {
state.wheels += extra
}
},
getters: {
axles: (state) => state.wheels / 2
}
}
Dynamic Modules
Vuex allows us to register modules into store at runtime after store is constructed. We can do the following to create dynamic modules
interface StoreType {
mm: MyModule
}
// Declare empty store first
const store = new Vuex.Store<StoreType>({})
// Create module later in your code (it will register itself automatically)
// In the decorator we pass the store object into which module is injected
// NOTE: When you set dynamic true, make sure you give module a name
@Module({ dynamic: true, store: store, name: 'mm' })
class MyModule extends VuexModule {
count = 0
@Mutation
incrCount(delta) {
this.count += delta
}
}
Accessing modules with NuxtJS
There are many possible ways to construct your modules. Here is one way for drop-in use with NuxtJS (you simply need to add your modules to ~/utils/store-accessor.ts
and then just import the modules from ~/store
):
~/store/index.ts
:
import { Store } from 'vuex'
import { initialiseStores } from '~/utils/store-accessor'
const initializer = (store: Store<any>) => initialiseStores(store)
export const plugins = [initializer]
export * from '~/utils/store-accessor'
~/utils/store-accessor.ts
:
import { Store } from 'vuex'
import { getModule } from 'vuex-module-decorators'
import example from '~/store/example'
let exampleStore: example
function initialiseStores(store: Store<any>): void {
exampleStore = getModule(example, store)
}
export {
initialiseStores,
exampleStore,
}
Now you can access stores in a type-safe way by doing the following from a component or page - no extra initialization required.
import { exampleStore } from '~/store'
...
someMethod() {
return exampleStore.exampleGetter
}
Using vuex-persist
If you would like to preserve the state e.g when loading in the state from vuex-persist
...
-- @Module({ dynamic: true, store: store, name: 'mm' })
++ @Module({ dynamic: true, store: store, name: 'mm', preserveState: true })
class MyModule extends VuexModule {
...
Or when it doesn't have a initial state and you load the state from the localStorage
...
-- @Module({ dynamic: true, store: store, name: 'mm' })
++ @Module({ dynamic: true, store: store, name: 'mm', preserveState: localStorage.getItem('vuex') !== null })
class MyModule extends VuexModule {
...