fernandoescolar

Types vue

Vue typescript decorators

Version Version: 1.1.0 Version Updated: 11/06/2019 By: fernandoescolar License: MIT

DownloadsLast30Days: 366

https://github.com/fernandoescolar/types-vue

npm i types-vue
yarn add types-vue

types-vue

Binding helpers for Vuex and vue-class-component on steroids

Dependencies

Based on

Installation

$ npm install --save types-vue
# or
$ yarn add types-vue

Usage

There are these decorators for a component:

  • Component (from 'vue-class-component')
  • Prop
  • Watch
  • MapGetter
  • MapAction

And these decorators for a vuex module:

  • Module
  • Getter
  • Mutation
  • Action

Component

@Prop

This decorator adds the field to "props" component collection. It can be invoked in different ways:

  1. Without parameters
  2. With the type constructor (ex. Number, String, Boolean...)
  3. With PropOptions:
    • type: type constructor (ex. Number, String, Boolean...)
    • required: boolean
    • default: defaul value of the prop
    • validator: a validator function
import { Vue, Component, Prop } from 'types-vue';

@Component
export default class MyComponent extends Vue {
    @Prop()
    title!: string;

    @Prop(Number)
    count!: number;

    @Prop({
        type: String,
        required: false,
        default: 'someone@mail.com',
        validator(value: string): boolean {
            return true;
        }
    })
    email!: string;
}

This is like:

export default {
  props: {
    title: { },
    count: Number,
    email: {
        type: String,
        required: false,
        default: 'someone@mail.com',
        validator(value: string): boolean {
            return true;
        }
    },
  }
}

@Watch

This decorator adds the method to "watch" component collection. It can be invoked in different ways:

  1. With the name of the property to watch.
  2. With the name of the property to watch and WatchOptions:
    • deep: boolean
    • inmediate: boolean
import { Vue, Component, Watch } from 'types-vue';

@Component
export default class MyComponent extends Vue {
    title: string = 'hello';
    counter: number = 0;

    @Watch('title')
    onTitleChanged(value: string): void {
        console.log('title is ' + value);
    }

    @Watch('counter', { deep: true, immediate: true })
    onCounterChanged(value: number, oldValue: number): void {
        console.log('counter is ' + value.toString());
    }
}

This is like:

export default {
    data() {
        return {
            title: 'hello',
            counter: 0
        };
    }
    watch: {
        'title': {
            handler: 'onTitleChanged',
            immediate: false,
            deep: false
        },
        'counter': {
            handler: 'onCounterChanged',
            immediate: true,
            deep: true
        }
    },
    methods: {
        onTitleChanged(value) {  
            console.log('title is ' + value);
        },
        onCounterChanged(value, oldValue) {
            console.log('counter is ' + value.toString());
        }
    }
  }
}

@Filter

This decorator adds the method to "filters" component collection.

import { Vue, Component, Watch } from 'types-vue';

@Component
export default class MyComponent extends Vue {

    @Filter()
    static withExclamation(value: string): string {
        return '!' + value;
    }
}

This is like:

export default {
    filters: {
        withExclamation(value) {  
            return '!' + value;
        }
    }
  }
}

@MapGetter

When you are using Vuex, this decorator adds the field to "computed" as a vuex mapGetter in the component. It can be invoked in different ways:

  1. Without parameters
  2. With MapGetterOptions:
    • namespace: the name of the module namespace
import { Vue, Component, MapGetter } from 'types-vue';

@Component
export default class MyComponent extends Vue {
    @MapGetter()
    title: string;

    @MapGetter({ namespace: 'counter' })
    count: number;
}

This is like:

export default {
  computed: {
    ...mapGetters(['title']),
    ...mapGetters('counter', ['count'])
  }
}

@MapAction

When you are using Vuex, this decorator adds the field to "methods" as a vuex mapAction in the component. It can be invoked in different ways:

  1. Without parameters
  2. With MapActionOptions:
    • namespace: the name of the module namespace
import { Vue, Component, MapAction } from 'types-vue';

@Component
export default class MyComponent extends Vue {
    @MapAction()
    changeTitle: any;

    @MapAction({ namespace: 'counter' })
    increment: (val: number) => void;
}

This is like:

export default {
  methods: {
    ...mapActtions(['changeTitle']),
    ...mapActtions('counter', ['increment'])
  }
}

Vuex Module

@Module

If you are using Vuex, and you want to create a new module, you can use the Module decorator and extends the VuexModule class. You can call the Module decorator:

  1. Without parameters
  2. With ModuleOptions:
    • name: the namespace name of the module;
    • namespaced: a boolean value to set if you are going to use namespacing in this vuex module;
import { Module, VuexModule } from 'types-vue';

@Module({ namespaced: true })
export default class extends VuexModule {
    counter: number = 0;
}

This is like:

export default {
  namespaced: true,
  state: {
      counter: 0
  }
}

@Getter

This decorator adds the method to "getters" vuex module collection.

import { Module, VuexModule, Getter } from 'types-vue';

@Module({ namespaced: true })
export default class extends VuexModule {
    _counter: number = 0;

    @Getter()
    counter(): number {
        return this._counter;
    }
}

This is like:

export default {
  namespaced: true,
  state: {
      _counter: 0
  },
  getters: {
      counter: function(state) {
          return state._counter;
      }
  }
}

You can determine the access mode to the vuex store Getter:

import { Module, VuexModule, Getter } from 'types-vue';

@Module({ namespaced: true })
export default class extends VuexModule {
    _list: string[] = []];

    @Getter({ mode: 'value'})
    listValue(): string[] {
        return this._list;
    }

    @Getter({ mode: 'reference'})
    listReference(): string[] {
        return this._list;
    }
}

This is like:

export default {
  namespaced: true,
  state: {
      _counter: 0
  },
  getters: {
      listValue: function(state) {
          return state._list;
      },
      listReference: function(state) {
          return Object.assign({}, state._list);
      }
  }
}

@Mutation

This decorator adds the method to "mutations" vuex module collection.

import { Module, VuexModule, Mutation } from 'types-vue';

@Module({ namespaced: true })
export default class extends VuexModule {
    _counter: number = 0;

    @Mutation()
    increment(value: number): void {
        this._counter += value;
    }
}

This is like:

export default {
  namespaced: true,
  state: {
      _counter: 0
  },
  mutations: {
      increment: function(state, value) {
          state._counter += value;
      }
  }
}

@Action

This decorator adds the method to "actions" vuex module collection.

import { Module, VuexModule, Mutation, Action } from 'types-vue';

@Module({ namespaced: true })
export default class extends VuexModule {
    _counter: number = 0;

    @Mutation()
    increment(value: number): void {
        this._counter += value;
    }

    @Mutation()
    decrement(value: number): void {
        this._counter -= value;
    }

    @Action({ commit: 'increment' })
    incr(value: number): number {
        if (value < 0) {
            return 0;
        }

        return value;
    }

    @Action({ useContext: true })
    decr(context: ActionContext<any, any>, value: number): void {
        if (value < 0) {
            return 0;
        }

        context.commit('decrement', value);
    }
}

This is like:

export default {
  namespaced: true,
  state: {
      _counter: 0
  },
  mutations: {
      increment: function(state, value) {
          state._counter += value;
      },
      decrement: function(state, value) {
          state._counter += value;
      }
  },
  actions: {
      incr: function(context, value) {
          let result = (value) => {
                if (value < 0) {
                    return 0;
                }

                return value;
          }();
          context.commit('increment', result);
      },
      decr: function(context, value) {
          let result = (value) => {
                if (value < 0) {
                    return 0;
                }

                return value;
          }();
          context.commit('decrement', result);
      }
  }
}

Examples

You can see a complete demo project in the demo folder of this project. The code is like the following:

Component

// header-panel.ts
import { Vue, Component, Prop, Watch } from 'types-vue';

@Component
export default class Header extends Vue {
    @Prop()
    title!: string;

    @Watch('title')
    onTitleChanged(value: string) {
        console.log('title is ' + value);
    }
}
<!-- header-panel.vue -->
<template>
    <div>
        <h1>{{ title }}</h1>
    </div>
</template>
<script src="./header-panel.ts"></script>
// demo.ts
import { Vue, Component, Watch } from 'types-vue';
import HeaderPanel from './header-panel.vue';

@Component({
    components: {
        'header-panel': HeaderPanel
    }
})
export default class NotificationPanelComponent extends Vue {
    title: string = 'Hello Vue from typescript';

    @Watch('title')
    onTitleChanged(value: string) {
        console.log('in demo the title is ' + value);
    }
}
<!-- demo.vue -->
<template>
    <div>
        <header-panel :title="title" :kk="title" />
        <p>
            <span>Change the title:</span>
            <input type="text" v-model="title" />
        </p>
    </div>
</template>
<script src="./demo.ts"></script>

Vuex

// counterModule.ts
import { Module, VuexModule, Mutation, Action, Getter } from 'types-vue';

@Module({ namespaced: true })
export default class extends VuexModule {
    _counter: number = 0;

    @Getter()
    counter(): number {
        return this._counter;
    }

    @Mutation()
    increment(value: number): void {
        this._counter += value;
    }

    @Mutation()
    decrement(value: number): void {
        this._counter -= value;
    }

    @Action({ commit: 'increment' })
    incr(value: number): number {
        if (value < 0) {
            return 0;
        }

        return value;
    }

    @Action({ commit: 'decrement' })
    decr(value: number): number {
        if (value < 0) {
            return 0;
        }

        return value;
    }
}
// store.ts
import Vue from 'vue';
import Vuex, { Store } from 'vuex';
import counter from './counterModule';

Vue.use(Vuex);

const store = new Store({
    state: {},
    modules: {
        counter
    }
});

export default store;
// counter-panel.ts
import { Vue, Component, MapGetter, MapAction } from 'types-vue';

@Component
export default class NotificationPanelComponent extends Vue {
    @MapGetter({ namespace: 'counter' })
    counter;

    @MapAction({ namespace: 'counter' })
    incr;
}
<!-- counter-panel.ts -->
<template>
    <div>
        <p>The counter is {{ counter }}</p>
        <button v-on:click="incr(1)">Add 1</button>
    </div>
</template>
<script src="./counter-panel.ts"></script>

License

MIT

Categories: UtilitiesTypescript