Solve Vue error: Unable to correctly use dynamic component for dynamic component loading

Solution to Vue error: Unable to correctly use dynamic component for dynamic component loading

During the Vue development process, we often encounter situations where components need to be loaded dynamically. Vue provides the function of dynamic component to achieve this requirement. However, sometimes we encounter errors when using dynamic components, causing the components to fail to load correctly. This article will introduce two common error situations and solutions, and provide code examples.

1. Error message: "Unknown custom element: - did you register the component correctly?"

This error message indicates that Vue cannot recognize the loaded s component. Normally, we need to ensure that the component has been registered through the Vue.component() method. But when using dynamic component to load components, we cannot use this method to register. Instead, we need to use Vue's components option to register components globally or locally.

The following is a sample code to register a component globally:

// main.js
import Vue from 'vue'
import ComponentA from './ComponentA.vue'

Vue.component('component-a', ComponentA)

<!-- App.vue -->
<template>
  <div>
    <dynamic-component :component="currentComponent"></dynamic-component>
  </div>
</template>

<script>
import DynamicComponent from './DynamicComponent.vue'
import ComponentA from './ComponentA.vue'
import ComponentB from './ComponentB.vue'

export default {
  components: {
    DynamicComponent,
    ComponentA,
    ComponentB
  },
  data() {
    return {
      currentComponent: 'component-a'
    }
  }
}
</script>

In the above code, we globally register the ComponentA component in the main file main.js, and then use it in App.vue Use dynamic component to load the current component. Doing this ensures that Vue can correctly identify and load the component.

2. Error message: "Invalid dynamic reference in "

This error message indicates that we are in the component attribute of dynamic component An invalid component is referenced. Normally, we need to ensure that when using dynamic components, the value of the component attribute is a legal component name or component option.

The following is a sample code for partially registering components:

<!-- App.vue -->
<template>
  <div>
    <dynamic-component :component="currentComponent"></dynamic-component>
  </div>
</template>

<script>
import DynamicComponent from './DynamicComponent.vue'

export default {
  components: {
    DynamicComponent
  },
  data() {
    return {
      currentComponent: 'component-a'
    }
  }
}
</script>

In the above code, we did not register the ComponentA and ComponentB components in the components option, but used the components directly in the data The name is used as the value of the component property of the dynamic component. This works because Vue automatically looks for the component name in locally registered components.

This is how to solve two common errors encountered when using dynamic component to load components in Vue. By registering components globally or locally and ensuring that the component name or component options referenced are legal, we can successfully use dynamic component to implement dynamic component loading. Hope this article is helpful to everyone!

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