Transferring data from a child component to a parent component in Vue without the need for a click

Question

Transferring data from a child component to a parent component in Vue without the need for a click

In my Vue project, I have a parent component called ChangeInfo which contains a child component named ShowWorkInfo. The ShowWorkInfo component includes several input forms for updating job information. To manage the data input, I created an object variable called work_info and used v-model to bind the form fields. However, I'm unsure how to pass this data from the child component to the parent component without any buttons in the child component. I am considering whether it would be better to combine everything into the ChangeInfo component instead of splitting it up. Here is a snippet of my code.

ChangeInfo (parent component)

export default class ChangeInfo extends Vue {
  public isUpdated: boolean = false
 // Rest of the script remains unchanged...

I make use of two functions like so:

<template>
  <div class="d-block">
    <ShowProfile />
    <ShowWorkInfo :isUpdated="isUpdated" @update-work-info="updateWorkInfo" />
    <ShowPersonalInfo
      :isUpdated="isUpdated"
      @update-personal-info="updatePersonalInfo"
    />
    <div class="w--27 mw-100 mx-auto my-9">
      <button
        @click="triggerSubmit"
        v-b-modal="'update-success'"
        class="btn btn-primary w-100"
      >
        {{ $t('common.btn.btn_update') }}
      </button>
    </div>
    <ModalUpdateSuccess />
  </div>
</template>

typescript vue.js vue-class-components

Answer 1

Answer №1

There are several approaches to achieve this:

One quick and simple method is to pass another prop from the parent component to the child component. This prop should be set to true when the common.btn.btn_update button is pressed. In the updateWorkInfo function, you can set up a watcher in the child component for this prop. When the prop changes to true, emit ('submitted', data) to send the data back to the parent component and handle the submit event there.

// Code for Parent script
// Some code here

I'm not particularly fond of this approach, but it does work as intended!

A more traditional way would be to include the submit button within the child component and emit a submitted event along with the data. This approach is cleaner and promotes reusability:

// Code for Parent script
// Some code here

<!-- Parent template -->
// Template code here
<!-- End of Parent template -->

<!-- Child template -->
// Template code here
<!-- End of Child template -->

Please note that there are other variations of achieving this functionality. If you're interested, feel free to ask. The methods mentioned above are some of the most commonly used ones I've encountered.

UPDATE: Form validation has been added in the first block. Feel free to try it out! However, if you require field-level validation, it's recommended to move the submit logic to the child component.

Answer 2

There are several approaches to achieve this:

One quick and simple method is to pass another prop from the parent component to the child component. This prop should be set to true when the common.btn.btn_update button is pressed. In the updateWorkInfo function, you can set up a watcher in the child component for this prop. When the prop changes to true, emit ('submitted', data) to send the data back to the parent component and handle the submit event there.

// Code for Parent script
// Some code here

I'm not particularly fond of this approach, but it does work as intended!

A more traditional way would be to include the submit button within the child component and emit a submitted event along with the data. This approach is cleaner and promotes reusability:

// Code for Parent script
// Some code here

<!-- Parent template -->
// Template code here
<!-- End of Parent template -->

<!-- Child template -->
// Template code here
<!-- End of Child template -->

Please note that there are other variations of achieving this functionality. If you're interested, feel free to ask. The methods mentioned above are some of the most commonly used ones I've encountered.

UPDATE: Form validation has been added in the first block. Feel free to try it out! However, if you require field-level validation, it's recommended to move the submit logic to the child component.

Answer 3

Answer №2

It may not be the conventional approach, but here's an alternative method. Imagine a scenario where you don't have a button to trigger sending information to a parent component. In such cases, we can utilize watch and v-model with lazy loading.

This is just a simple example and not directly related to your code.

ChildComponent:


<template>
  <div class="hello">
    <input type="text" placeholder="Enter something" v-model.lazy="myObj.message">
    <input type="text" placeholder="Enter something" v-model.lazy="myObj.name"> 
  </div>
</template>

<script>
export default {
  name: "HelloWorld",
  props: {
    msg: String
  },
  data () {
    return {
      myObj : {
        message:"",
        name : ""
      }
    }
  },
  watch: {
    myObj : {
      handler (newVal) {
      this.$emit('change', newVal)
    },
    deep: true
    }
  }
};
</script>

ParentComponent:


<template>
  <div id="app">
    <HelloWorld @change="change"/>
  </div>
</template>

<script>
import HelloWorld from "./components/HelloWorld";

export default {
  name: "App",
  components: {
    HelloWorld
  },
  methods: {
    change (obj) {
      console.log(obj)
    }
  }
};
</script>

The console will display your message once you click outside the input field. If v.model.lazy is not used, any changes in the input will trigger data transmission immediately. Feel free to test it out to see if it fits your requirements.

EDIT: I have included deep:true in order to watch the entire object. This allows you to specifically log obj.name or obj.message in the parent component.

Answer 4

It may not be the conventional approach, but here's an alternative method. Imagine a scenario where you don't have a button to trigger sending information to a parent component. In such cases, we can utilize watch and v-model with lazy loading.

This is just a simple example and not directly related to your code.

ChildComponent:


<template>
  <div class="hello">
    <input type="text" placeholder="Enter something" v-model.lazy="myObj.message">
    <input type="text" placeholder="Enter something" v-model.lazy="myObj.name"> 
  </div>
</template>

<script>
export default {
  name: "HelloWorld",
  props: {
    msg: String
  },
  data () {
    return {
      myObj : {
        message:"",
        name : ""
      }
    }
  },
  watch: {
    myObj : {
      handler (newVal) {
      this.$emit('change', newVal)
    },
    deep: true
    }
  }
};
</script>

ParentComponent:


<template>
  <div id="app">
    <HelloWorld @change="change"/>
  </div>
</template>

<script>
import HelloWorld from "./components/HelloWorld";

export default {
  name: "App",
  components: {
    HelloWorld
  },
  methods: {
    change (obj) {
      console.log(obj)
    }
  }
};
</script>

The console will display your message once you click outside the input field. If v.model.lazy is not used, any changes in the input will trigger data transmission immediately. Feel free to test it out to see if it fits your requirements.

EDIT: I have included deep:true in order to watch the entire object. This allows you to specifically log obj.name or obj.message in the parent component.

Transferring data from a child component to a parent component in Vue without the need for a click

Answer №1

Answer №2

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