# Ep08#09 - Truyền dữ liệu components con cùng cấp, Ep08#10 - Sử dụng sự kiện Bus (ok)

### Part 1: Truyền dữ liệu components con cùng cấp sử dụng $emit, hoặc callbackfunction

C:\Users\Administrator\OneDrive\Desktop\vuejs2\src\components\HelloWorld.vue

```html
<template>
  <div class="container">
    <h1>{{ name }}</h1>
    <h1>{{ age }}</h1>
    <p>
      For a guide and recipes on how to configure / customize this project,<br>
      check out the
      <a href="https://cli.vuejs.org" target="_blank" rel="noopener">vue-cli documentation</a>.
    </p>
    <button @click="changeName">changeName</button>
    <hr>
    <div class="row">
      <div class="col-md-6">
        <hitest @resetNameParent="name=$event" :resetNameFn="resetNameCallback"  :myAge="age" :myAgeFn="changeAge"></hitest>
      </div>
      <div class="col-md-6">
        <pitest :myAge="age" :myAgeFn="changeAge" @editAgeParent="age=$event"></pitest>
      </div>
    </div>
  </div>
</template>
<script>
import Hitest from "./Hitest.vue";
import Pitest from "./Pitest.vue";
export default {
  name: 'HelloWorld',
  data: function() {
    return {
      name: "Skype",
      age: 18
    }
  },
  components: {
    Hitest,
    Pitest
  },
  methods: {
    changeName() {
      this.name = "change Name";
    },
    resetNameCallback() {
      this.name = 'resetNameCallback';
    },
    changeAge() {
      this.age = 34;
    }
  }
}
</script>

```

C:\Users\Administrator\OneDrive\Desktop\vuejs2\src\components\Hitest.vue

```html
<template>
  <div class="hello">
    <h1>{{ name }}</h1>
    <h2>{{myAge}}</h2>
    <button @click="resetName">ResetName</button>
    <button @click="resetNameFn">resetNameCallback</button>
  </div>
</template>
<script>
export default {
  name: 'Hitest',
  data: function() {
    return {
      name: "Hiiii"
    }
  },
  props: {
    resetNameFn: Function,
    myAge: Number,
  },
  methods: {
    resetName() {
      this.name = "Reseted";
      this.$emit('resetNameParent',this.name);
    }
  }
}
</script>

```

C:\Users\Administrator\OneDrive\Desktop\vuejs2\src\components\Pitest.vue

```html
<template>
  <div class="hello">
    <h1>{{ name }}</h1>
    <h2>{{myAge}}</h2>
    <button @click="myAgeEmit">Change Age by myAgeEmit</button>
    <button @click="myAgeFn">Change Age</button>
  </div>
</template>
<script>
export default {
  name: 'Pitest',
  data: function() {
    return {
      name: "Piiii"
    }
  },
  props: {
    myAge: Number,
    myAgeFn: Function
  },
  methods: {
    myAgeEmit() {
      this.myAge = 33;
      this.$emit('editAgeParent',this.myAge);
    }
  }
}
</script>

```

### Part 2: Sử dụng eventBus

C:\Users\Administrator\OneDrive\Desktop\vuejs2\src\main.js

```javascript
import Vue from 'vue'
import Hello from './components/HelloWorld.vue'
import App from './App.vue'
Vue.config.productionTip = false
export const eventBus = new Vue();
Vue.component('test',Hello)
new Vue({
  render: h => h(App),
}).$mount('#app')

```

C:\Users\Administrator\OneDrive\Desktop\vuejs2\src\components\Hitest.vue

```html
<template>
  <div class="hello">
    <h1>{{ name }}</h1>
    <h2>{{myAge}}</h2>
    <button @click="resetName">ResetName</button>
    <button @click="resetNameFn">resetNameCallback</button>
  </div>
</template>
<script>
import {eventBus} from '../main.js';
export default {
  name: 'Hitest',
  data: function() {
    return {
      name: "Hiiii"
    }
  },
  props: {
    resetNameFn: Function,
    myAge: Number,
  },
  methods: {
    resetName() {
      this.name = "Reseted";
      // this.$emit('resetNameParent',this.name);
      eventBus.$emit('resetNameParent',this.name);
    }
  },
  created() {
    eventBus.$on('editAgeParent',(age)=> {
      this.myAge = age;
    })
  }
}
</script>

```

C:\Users\Administrator\OneDrive\Desktop\vuejs2\src\components\Pitest.vue

```html
<template>
  <div class="hello">
    <h1>{{ name }}</h1>
    <h2>{{myAge}}</h2>
    <button @click="myAgeEmit">Change Age by myAgeEmit</button>
    <button @click="myAgeFn">Change Age</button>
  </div>
</template>
<script>
import {eventBus} from '../main.js';
export default {
  name: 'Pitest',
  data: function() {
    return {
      name: "Piiii"
    }
  },
  props: {
    myAge: Number,
    myAgeFn: Function
  },
  methods: {
    myAgeEmit() {
      this.myAge = 33;
      // this.$emit('editAgeParent',this.myAge);
      eventBus.$emit('editAgeParent',this.myAge);
    }
  }
}
</script>

```


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