one component to another component in vuejs trigger function

One Component to Another Component in VueJS Trigger Function

VueJS is a popular JavaScript framework that is widely used for building user interfaces. One of the most important features of VueJS is its ability to pass data from one component to another. In this article, we will discuss how to trigger a function in one component from another component in VueJS.

Using Props

The simplest and most common way to pass data between parent and child components in VueJS is by using props. Props are a way of passing data down from a parent component to a child component. To trigger a function in one component from another component using props, we need to define the prop in the child component and pass the function as a prop from the parent component.

<template>
  <div>
    <child-component v-bind:my-func="parentFunction"></child-component>
  </div>
</template>

<script>
import ChildComponent from './ChildComponent.vue';

export default {
  components: {
    ChildComponent
  },
  methods: {
    parentFunction() {
      console.log('Parent function triggered');
    }
  }
}
</script>

<!-- ChildComponent.vue -->
<template>
  <div>
    <button v-on:click="myFunc">Trigger Function</button>
  </div>
</template>

<script>
export default {
  props: ['myFunc']
}
</script>

In this example, we have a parent component that defines a function called "parentFunction". We pass this function as a prop to the child component called "ChildComponent". The child component then uses this prop to trigger the function when a button is clicked.

Using Events

Another way to trigger a function in one component from another component in VueJS is by using events. Events are a way of passing data up from a child component to a parent component. To trigger a function in one component from another component using events, we need to define the event in the child component and emit the event from the child component.

<template>
  <div>
    <child-component v-on:my-event="parentFunction"></child-component>
  </div>
</template>

<script>
import ChildComponent from './ChildComponent.vue';

export default {
  components: {
    ChildComponent
  },
  methods: {
    parentFunction() {
      console.log('Parent function triggered');
    }
  }
}
</script>

<!-- ChildComponent.vue -->
<template>
  <div>
    <button v-on:click="$emit('my-event')">Trigger Function</button>
  </div>
</template>

<script>
export default {
}
</script>

In this example, we have a parent component that defines a function called "parentFunction". We listen to the "my-event" event emitted by the child component called "ChildComponent" and call the parent function when the event is triggered. The child component emits the "my-event" event when a button is clicked.

Conclusion

Passing data from one component to another and triggering functions is an important aspect of building complex user interfaces in VueJS. We can use props and events to accomplish this. Using props is a simpler approach when passing data from parent to child, while using events is a better approach when passing data from child to parent. By understanding these concepts, we can build more dynamic and interactive user interfaces in VueJS.