Strategies for sending data to child components in Vue

Within my parent component, I am making an API call and receiving a response. My goal is to pass this response as a prop to a child component in Vue. Below is the snippet of the parent component and the API call:

<button class="btn button col-2" @click="addToCart()">
  Add to cart
</button>
addToCart: function () {
  let amount = this.itemsCount !== "" ? this.itemsCount : 1;
  if(this.variationId != null) {
    this.warningMessage = false;
    cartHelper.addToCart(this.product.id, this.variationId, amount, (response) => {
      this.cartItems = response.data.attributes.items;
    });
  } else {
    this.warningMessage = true;
  }
},

I aim to pass the "this.cartItems" to the child component shown below:

<template>
    <div
        class="dropdown-menu cart"
        aria-labelledby="triggerId"
    >
        <div class="inner-cart">
            <div v-for="item in cart" :key="item.product.id">

                <div class="cart-items">
                    <div>
                        <strong>{{ item.product.name }}</strong>
                        <br/> {{ item.quantity }} x $45
                    </div>
                    <div>
                        <a class="remove" @click.prevent="removeProductFromCart(item.product)">Remove</a>
                    </div>
                </div>
            </div>
            <hr/>
            <div class="cart-items-total">
                <span>Total: {{cartTotalPrice}}</span>
                <a href="#" @click.prevent="clearCartItems()">Clear Cart</a>
            </div>
            <hr/>
            <router-link :to="{name: 'order'}" class="btn button-secondary">Go To Cart</router-link>
        </div>
    </div>
</template>

<script>

export default {
    computed: {

    },
    methods: {

    }
};
</script>

As a beginner in Vue, any assistance with this would be greatly appreciated.

Answer №1

Sharing data through props is a straightforward process. If you want to pass the variable cartItems as a prop, you can achieve this by:

<my-child-component :cartItems="cartItems"></my-child-component>

In this scenario, the child component is named myChildComponent. The cartItems variable is passed using :cartItems="cartItems". Inside the child component, you define the prop like so:

props: {
    cartItems: Object
  }

Subsequently, you can access the data using this.cartItems within your methods or {{cartItems}} in your template.

Answer №2

Vue.component('Child', {
  template: `
    <div class="">
      <p>{{ childitems }}</p>
    </div>
  `,
  props: ['childitems']
})

new Vue({
  el: '#demo',
  data() {
    return {
       items: []
    }
  },
  methods: {
    getItems() {
      //your API call
      setTimeout(() => {
        this.items = [1, 2]
      }, 2000);
    }
  }
  
})

Vue.config.productionTip = false
Vue.config.devtools = false
<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="demo">
  <button @click="getItems">get data</button>
  <Child v-if="items.length" :childitems="items" />
</div>

To render the child component with a condition

v-if="this.cartItems.length"
, wait for the response and make sure to check if you have received this.cartItems.

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