Trigger a child-mounted event and retrieve it from the parent component

Question

Trigger a child-mounted event and retrieve it from the parent component

Imagine I have a component named child. There is some data stored there that I need to retrieve in the parent component. To accomplish this, I plan to emit an event in the childs mount using

this.$emit('get-data', this.data)

, and then receive it in the parent mount. Is it actually achievable and practical? If so, how can one go about implementing it? If not, what are some superior alternatives?

Cheers.

javascript vue.js

Answer 1

Answer №1

It's uncertain whether you can listen for emitted data from a child component's mount() function inside the parent component's mount(). To achieve this, you need to bind the listener to the child component within the parent template. Here is a common example using Single File Components (SFC):

Child.vue:

export default{
   name: 'child',
   mount(){
     this.$emit('get-data', this.data);
   }
}

Parent.vue:

<template>
   <div>
      <child v-on:get-data="doSomething"></child>
   </div>
</template>
<script>
import Child from './Child';
export default{
   name: 'parent',
   components: { Child },
   methods(){
     doSomething(data){
       //Do something with data.
     }
   }
}
</script>

Answer 2

It's uncertain whether you can listen for emitted data from a child component's mount() function inside the parent component's mount(). To achieve this, you need to bind the listener to the child component within the parent template. Here is a common example using Single File Components (SFC):

Child.vue:

export default{
   name: 'child',
   mount(){
     this.$emit('get-data', this.data);
   }
}

Parent.vue:

<template>
   <div>
      <child v-on:get-data="doSomething"></child>
   </div>
</template>
<script>
import Child from './Child';
export default{
   name: 'parent',
   components: { Child },
   methods(){
     doSomething(data){
       //Do something with data.
     }
   }
}
</script>

Answer 3

Answer №2

One interesting method for sending information from a child component to its parent is through the use of scoped slots. This approach might be more suitable in scenarios where data needs to be passed without any direct correlation to an event. However, I'm uncertain if I have grasped your situation completely.

Answer 4

One interesting method for sending information from a child component to its parent is through the use of scoped slots. This approach might be more suitable in scenarios where data needs to be passed without any direct correlation to an event. However, I'm uncertain if I have grasped your situation completely.

Answer 5

Answer №3

For optimal performance, I recommend utilizing the created hook instead of mounted, as you only require access to reactive data and events. You can emit the entire child component and then navigate through its data as necessary.

template

<child-component @emit-event="handleEvent">
  {{ parentData }}
</child-component>

child

Vue.component('child-component', {
  template: '<div><slot/></div>',
  data() {
    return {
      childData: 'childData', 
    }
  },
  created() {
    this.$emit('emit-event', this)
  }
})

parent

new Vue({
  el: "#app",
  data: {
    parentData: undefined,
  },
  methods: {
    handleEvent({ childData }) {
      this.parentData = childData
    }
  }
})

Feel free to explore this demonstration

Answer 6

For optimal performance, I recommend utilizing the created hook instead of mounted, as you only require access to reactive data and events. You can emit the entire child component and then navigate through its data as necessary.

template

<child-component @emit-event="handleEvent">
  {{ parentData }}
</child-component>

child

Vue.component('child-component', {
  template: '<div><slot/></div>',
  data() {
    return {
      childData: 'childData', 
    }
  },
  created() {
    this.$emit('emit-event', this)
  }
})

parent

new Vue({
  el: "#app",
  data: {
    parentData: undefined,
  },
  methods: {
    handleEvent({ childData }) {
      this.parentData = childData
    }
  }
})

Feel free to explore this demonstration

Trigger a child-mounted event and retrieve it from the parent component

Answer №1

Answer №2

Answer №3

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