SoFunction
Updated on 2025-04-05

vue3 Solution for the parent control to remotely obtain data and cannot be displayed on child components

If the parent component gets data remotely in Vue 3 and the child component cannot display this data, it is usually because the data is delivered or rendered incorrectly, or the child component has been rendered before the data is fully loaded. Here are the possible solutions:

Make sure that the child component is rendered after the data is loaded: If the parent component obtains data through an asynchronous request, make sure that the child component is rendered after the data is loaded. The data can be passed to the child component through props after the data loading is completed or the Promise parsed.

Solution 1: Usev-ifControl the rendering of subcomponents

In the parent component, you can usev-ifDirectives to control the rendering of subcomponents and ensure that subcomponents are rendered after data is loaded.

<template>
  <div>
    <!-- The rendering of the child component is controlled in the parent component based on whether the data is loaded. -->
    <child-component v-if="dataLoaded" :data="loadedData" />
  </div>
</template>
<script setup>
import { ref, onMounted } from 'vue';
const dataLoaded = ref(false);
const loadedData = ref([]);
// Simulate asynchronous data loadingonMounted(() => {
  setTimeout(() => {
     = [/* Loaded data */];
     = true; // Data loading is complete  }, 1000);
});
</script>

Method 2: UseAsynchronous Components

Vue 3 supports asynchronous components, which can reload and render subcomponents when needed. This helps render subcomponents after the data is fully loaded.

<template>
  <div>
    <!-- Use asynchronous components to delay rendering of subcomponents -->
    <async-component :data="loadedData" />
  </div>
</template>
<script setup>
import { ref, onMounted } from 'vue';
const loadedData = ref([]);
// Simulate asynchronous data loadingonMounted(() => {
  setTimeout(() => {
     = [/* Loaded data */];
  }, 1000);
});
</script>
<script>
import { defineAsyncComponent } from 'vue';
// Define asynchronous subcomponentsconst AsyncComponent = defineAsyncComponent(() =>
  import('./')
);
</script>

Solution 3: Trigger the update of subcomponents

If the update of the subcomponent cannot be automatically triggered after the data is loaded, you can try using$forceUpdateMethod to manually trigger the update of the subcomponent.

<template>
  <div>
    <!-- The rendering of the child component is controlled in the parent component based on whether the data is loaded. -->
    <child-component :data="loadedData" />
  </div>
</template>
<script setup>
import { ref, onMounted } from 'vue';
const loadedData = ref([]);
// Simulate asynchronous data loadingonMounted(() => {
  setTimeout(() => {
     = [/* Loaded data */];
    // Manually trigger the update of subcomponents    $.$forceUpdate();
  }, 1000);
});
</script>

This is the article about the remote data acquisition of vue3 parent controls that cannot be displayed on children components. For more related content of vue3 parent controls, please search for my previous articles or continue browsing the related articles below. I hope everyone will support me in the future!