Create a new variable to activate a function within the parent component in Vue

Question

Create a new variable to activate a function within the parent component in Vue

I want to invoke a function in the parent component from its child component.

In my Vue project, I have designed a reusable component that can be used across multiple pages. After the function is executed in this component, I aim to call a specific function in its parent element.

To achieve this, I utilize this.$parent.getLocations(), which effectively triggers the desired function.

However, since the component should be flexible and adaptable, the function name needs to be dynamic - for instance, it could be getPets() or getLunch().

I pass the keyword 'Location' through as a prop, enabling me to use it within the component. But when attempting expressions like

'${this.$parent}.get${this.type}s()}'

(where this.type is 'Location') or

this.$parent + ".get" + this.type +" s()

', the functions fail to execute properly.

How do I set `getLocations` as a variable to run the specified function?

javascript vue.js vuejs2 vue-component

Answer 1

Answer №1

Avoiding an anti-pattern is crucial. It's best practice for a child component not to be aware of its parent's functions.

Example in the child component:

this.$emit('needs-locations', { type: this.type })

And in the parent component:

<child @needs-locations="getLocations" :locations="locations">

getLocations(type) {
  api.then((locations) => this.locations = locations)
}

This approach allows for bidirectional communication between components without creating dependencies.

Answer 2

Avoiding an anti-pattern is crucial. It's best practice for a child component not to be aware of its parent's functions.

Example in the child component:

this.$emit('needs-locations', { type: this.type })

And in the parent component:

<child @needs-locations="getLocations" :locations="locations">

getLocations(type) {
  api.then((locations) => this.locations = locations)
}

This approach allows for bidirectional communication between components without creating dependencies.

Answer 3

Answer №2

Start by dispatching an event from the child component to its parent and include a specified type.

this.$dispatch('executeAction', type)

Next, handle the dispatched event:

<child @executeAction="handleExecution"/>

In the parent component, the method for handling the action would be as follows:

handleExecution(type) {
        switch (type) {
            case 'Tasks':
                performTasks();
            case 'Chores':
                completeChores();
            default:
                break;
        }
    }

An alternative approach using if-else statements can also be used effectively.

Answer 4

Start by dispatching an event from the child component to its parent and include a specified type.

this.$dispatch('executeAction', type)

Next, handle the dispatched event:

<child @executeAction="handleExecution"/>

In the parent component, the method for handling the action would be as follows:

handleExecution(type) {
        switch (type) {
            case 'Tasks':
                performTasks();
            case 'Chores':
                completeChores();
            default:
                break;
        }
    }

An alternative approach using if-else statements can also be used effectively.

Create a new variable to activate a function within the parent component in Vue

Answer №1

Answer №2

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