# mobx-vue

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Vue2 bindings for MobX, inspired by [mobx-react](https://github.com/mobxjs/mobx-react). Looking for Vue3 support? Please look here [mobx-vue-lite](https://github.com/mobxjs/mobx-vue-lite)

![logo](https://github.com/mobxjs/mobx-vue/blob/master/logo.png?raw=true)

## Support Table
| package | mobx v6 | mobx v2/v3/v4/v5 | vue2 | vue3 | 
| ------  | ------- | ---------------- | ---- | ---- |
| [mobx-vue](https://github.com/mobxjs/mobx-vue) | >= v2.1.0 | * (exclude v2.1.0) | * | - |
| [mobx-vue-lite](https://github.com/mobxjs/mobx-vue-lite) | * | - | - | * |
> `*` means `all` and `-` means `none`
 
## Installation

```bash
npm i mobx-vue -S
```

or

```bash
yarn add mobx-vue
```

## Why mobx-vue 

MobX is an unopinionated, scalable state management, which can make our programming more intuitive.

Unlike the other vue-rx-inspired libraries which based on the plugin mechanism of vue, mobx-vue will be the simplest you ever meet. What you all need is to bind your state in component definition and observe it just like [mobx-react](https://github.com/mobxjs/mobx-react) does,  then your component will react to your state changes automatically which managed by mobx.

And, the most important is that you can build a view-library-free application, if you wanna migrate to another view library(React/Angular) someday, rewrite the template and switch to the relevant mobx bindings([mobx-react](https://github.com/mobxjs/mobx-react),[mobx-angular](https://github.com/mobxjs/mobx-angular),[mobx-angularjs](https://github.com/mobxjs/mobx-angularjs)) is all you have to do.

### Articles: 

* [Build A View-Framework-Free Data Layer Based on MobX — Integration With Vue](https://medium.com/@kuitos/build-a-view-framework-free-data-layer-based-on-mobx-integration-with-vue-1-8b524b86c7b8)

* [Why MobX + movue, instead of Vuex?](https://github.com/nighca/movue/issues/8)
* [基于 MobX 构建视图框架无关的数据层-与 Vue 的结合(1)](https://zhuanlan.zhihu.com/p/37736470)

## Usage

We highly recommend using the bindings with [vue-class-component](https://github.com/vuejs/vue-class-component) decorator, and define the Store/ViewModel independently.

```ts
import { action, computed, observable } from "mobx";
export default class ViewModel {
    @observable age = 10;
    @observable users = [];

    @computed get computedAge() {
        return this.age + 1;
    }

    @action.bound setAge() {
        this.age++;
    }
    
    @action.bound async fetchUsers() {
    	this.users = await http.get('/users')
    }
}
```

```vue
<template>
    <section>
        <p v-text="state.age"></p>
        <p v-text="state.computedAge"></p>
        <p v-for="user in state.users" :key="user.name">{{user.name}}</p>
        <button @click="state.setAge"></button>
    </section>
</template>

<script lang="ts">
    import Vue from "vue";
    import Component from "vue-class-component";
    import { Observer } from "mobx-vue";
    import ViewModel from "./ViewModel";

    @Observer
    @Component
    export default class App extends Vue {
        state = new ViewModel()
        mounted() { 
            this.state.fetchUsers();
        }
    }
</script>
```

Or used with the traditional way:

```vue
<script lang="ts">
    import { observer } from "mobx-vue";
    import ViewModel from "./ViewModel";

    export default observer({
        data() {
            return { state: new ViewModel() }
        },
        mounted() {
            this.state.fetchUsers() 
        }
    })
</script>
```

All you need is to bind your state to component and observe it. No more reactive data definitions in component.

*Tips: If you're tired of instantiating instance manually every time, you might wanna try the [mmlpx](https://github.com/mmlpxjs/mmlpx) library which leveraged a dependency injection system.*

## API

* observer((VueComponent | options): ExtendedVueComponent