Determine from a component whether it is contained within a specific DOM ancestor

Question

Determine from a component whether it is contained within a specific DOM ancestor

In my Vue.js application, I have implemented a custom component. My goal is for the HTML DOM children components to be able to determine whether they are contained within my component or in the main application itself. What would be the most effective approach to achieve this? I attempted using props, but since everything is nested within another application, it doesn't seem feasible.

For example: How can the si-button component identify that it is enclosed within a si-dialog? How can this information be passed to the si-button?

<si-dialog ref="siDialogChildren" name="children">
  <div>
    <h1>Hello children dialog!</h1>
    <p>Click outside the dialog to close this dialog.</p>
  </div>
  <si-button id="test" type="custom" :on-click="buttonPress">
    Click
  </si-button>
</si-dialog>

Sincerely,

Mirijam

javascript typescript vue.js

Answer 1

Answer №1

If you're looking to access the parent component in Vue, you can utilize the $parent as outlined in the official Vue documentation. For instance, you can retrieve the parent component's name by accessing its "$options.name" property.

Take a look at this example:

App.vue

<template>
  <div id="app">
    <ParentComponent>
      <ChildComponent />
    </ParentComponent>
  </div>
</template>

<script>
import ParentComponent from './components/ParentComponent'
import ChildComponent from "./components/ChildComponent";

export default {
  name: 'App',
  components: {
    ParentComponent,
    ChildComponent
  }
}
</script>

<style>
</style>

ParentComponent.vue

<template>
  <div>
    <p>I'm a parent component.</p>
    <slot></slot>
  </div>
</template>

<script>

export default {
  name: "ParentComponent",
  props: {},
  computed: {}
};
</script>

<style scoped>
</style>

ChildComponent.vue

<template>
  <div>
    <p>Parent name: {{componentName}}</p>
    <p>Am I inside a ParentComponent? {{componentName === "ParentComponent" ? "Yes!" : "No."}}</p>
  </div>
</template>

<script>
export default {
  name: "ChildComponent",
  computed: {
    componentName() {
        // Accessing the parent name from the $options.name property of our parent component
        return this.$parent.$options.name
    }
  }
};
</script>

<style scoped>
</style>

NOTE The $parent property also allows you to access other properties on the parent component. Give it a try!

Answer 2

If you're looking to access the parent component in Vue, you can utilize the $parent as outlined in the official Vue documentation. For instance, you can retrieve the parent component's name by accessing its "$options.name" property.

Take a look at this example:

App.vue

<template>
  <div id="app">
    <ParentComponent>
      <ChildComponent />
    </ParentComponent>
  </div>
</template>

<script>
import ParentComponent from './components/ParentComponent'
import ChildComponent from "./components/ChildComponent";

export default {
  name: 'App',
  components: {
    ParentComponent,
    ChildComponent
  }
}
</script>

<style>
</style>

ParentComponent.vue

<template>
  <div>
    <p>I'm a parent component.</p>
    <slot></slot>
  </div>
</template>

<script>

export default {
  name: "ParentComponent",
  props: {},
  computed: {}
};
</script>

<style scoped>
</style>

ChildComponent.vue

<template>
  <div>
    <p>Parent name: {{componentName}}</p>
    <p>Am I inside a ParentComponent? {{componentName === "ParentComponent" ? "Yes!" : "No."}}</p>
  </div>
</template>

<script>
export default {
  name: "ChildComponent",
  computed: {
    componentName() {
        // Accessing the parent name from the $options.name property of our parent component
        return this.$parent.$options.name
    }
  }
};
</script>

<style scoped>
</style>

NOTE The $parent property also allows you to access other properties on the parent component. Give it a try!

Determine from a component whether it is contained within a specific DOM ancestor

Answer №1

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