Tips for accessing slot properties within the created lifecycle hook

Question

Tips for accessing slot properties within the created lifecycle hook

I am facing an issue with accessing properties that I pass to my slot, as my slotProps are returning undefined.

Despite carefully reading the Vue docs and being new to Vue, I am unable to understand why I am unable to access the props data.

The Issue

While attempting to retrieve the slotProps in my child component's created hook, it is coming back as undefined.

This problem needs attention.

<template>
  <div>
    <slot :data="data" :loading="loading"></slot>
  </div>
</template>

Child Component

<template v-slot:default="slotProps">

  <div>
  
  </div>
  
</template>

<script>
export default {
  name: "child",
  created: function() {
    console.log("slotProps", slotProps);
  }
};
</script>

javascript vue.js vue-component children

Answer 1

Answer №1

You have the ability to utilize this object in order to track your child property

Check out this demo: https://stackblitz.com/edit/vue-kkhwzc?file=src%2Fcomponents%2FHelloWorld.vue

Code update for Child

<template v-slot:default="slotProps">
  <div >

  </div>
</template>

<script>
export default {
  name: "child"
  created: function() {
    console.log("slotProps", this.slotProps);
  }
};
</script>

Answer 2

You have the ability to utilize this object in order to track your child property

Check out this demo: https://stackblitz.com/edit/vue-kkhwzc?file=src%2Fcomponents%2FHelloWorld.vue

Code update for Child

<template v-slot:default="slotProps">
  <div >

  </div>
</template>

<script>
export default {
  name: "child"
  created: function() {
    console.log("slotProps", this.slotProps);
  }
};
</script>

Answer 3

Answer №2

To achieve what you want, you don't have to rely on the created() life cycle hook. Here are a few clarifications:

The feature you are utilizing is actually known as scoped slots. They come in handy because unlike default and named slots, the parent component cannot access the child component(s) data.
What you refer to as a Child is in fact the parent component.

The Child.vue component should look something like this:

<template>
  <div>
    <main>
      <slot :data="data1" :loading="loading1" />
    </main>
  </div>
</template>

<script>
export default {
  name: 'Page',
  data () {
    return {
      data1: 'foo',
      loading1: 'bar'
    }
  }
}
</script>

In the Parent.vue component, you can access the above component's data like so:

<template>
  <child>
    <template v-slot="slotProps">
      {{ slotProps.data }},
      {{ slotProps.loading }}
    </template>
  </child>
</template>

<script>
import Child from '@/components/Child.vue'

export default {
  components: { Child }
}
</script>

Alternatively, you can also destruct the objects like this:

<template>
  <child>
    <template v-slot="{data, loading }">
      {{ data }},
      {{ loading }}
    </template>
  </child>
</template>

<script>
import Child from '@/components/Child.vue'

export default {
  components: { Child }
}
</script>

This is a neat way to access a child component's data from the parent using scoped slots.

Answer 4

To achieve what you want, you don't have to rely on the created() life cycle hook. Here are a few clarifications:

The feature you are utilizing is actually known as scoped slots. They come in handy because unlike default and named slots, the parent component cannot access the child component(s) data.
What you refer to as a Child is in fact the parent component.

The Child.vue component should look something like this:

<template>
  <div>
    <main>
      <slot :data="data1" :loading="loading1" />
    </main>
  </div>
</template>

<script>
export default {
  name: 'Page',
  data () {
    return {
      data1: 'foo',
      loading1: 'bar'
    }
  }
}
</script>

In the Parent.vue component, you can access the above component's data like so:

<template>
  <child>
    <template v-slot="slotProps">
      {{ slotProps.data }},
      {{ slotProps.loading }}
    </template>
  </child>
</template>

<script>
import Child from '@/components/Child.vue'

export default {
  components: { Child }
}
</script>

Alternatively, you can also destruct the objects like this:

<template>
  <child>
    <template v-slot="{data, loading }">
      {{ data }},
      {{ loading }}
    </template>
  </child>
</template>

<script>
import Child from '@/components/Child.vue'

export default {
  components: { Child }
}
</script>

This is a neat way to access a child component's data from the parent using scoped slots.

Tips for accessing slot properties within the created lifecycle hook

Answer №1

Answer №2

Similar questions

Add option button

Storing socket.io data in an array

What is the method for executing a server-side script without it being transmitted to the browser in any way?

Step-by-step guide on mocking an asynchronous function in nodejs with jest

AngularJS: Error - Angular object is undefined

Error: Google Chrome encountered an unexpected token } that caused a syntax error

Guide on modifying cube material dynamically in WebGL at runtime

Create an image on a node's backdrop using a library of graph theory/networking techniques

Managing Time Before Browser Refresh in AngularLearn how to monitor and examine the time remaining before

I'm getting an error in Vue Router that says "Cannot read property 'push' of undefined"

The Map/Reduce function is producing incorrect results because of null values, causing me to receive NaN or erroneous

JavaScript - retrieve only the domain from the document.referrer

The React application functions smoothly when executed using react-scripts start, but encounters an "Unexpected SyntaxError: Unexpected Token: <" error upon building

When using Rails to render a JSON page remotely, the JavaScript AJAX handler fails to capture the response

The Art of Mass Updating Embedded Documents in MongoDB

Display a partial form in Rails using Ajax

applying classes conditionally in Vue.js

You are unable to insert a variable within the channels.get() method in discord.js

Do you need assistance with downloading files and disconnecting from clients?

having difficulty placing 3 pop-up windows on a single page