Using Vue.js: Executing a method in one component from another

Question

Using Vue.js: Executing a method in one component from another

Currently working with Vue.Js version 2 and looking to achieve a functionality where I can call the method c1method from component1 within the method c2method in component2 in order to reload data post submission.

Vue.component('component1', {
  methods: {
    c1method: function(){
     alert('Executing c1method')
    },
  }
})
Vue.component('component2', {
  methods: {
    c2method: function(){
     component('component1').c1method()//example
    },
  }
})

javascript vue.js vuejs2 vue-component

Answer 1

Answer №1

When dealing with non-parent-child relationships in components, the process involves calling methods from one component to another. By adding a $on function to the $root instance and using the $emit function, components can communicate effectively.

In the first component:

$emit function on the $root:

    ...
    c2method: function(){
     this.$root.$emit('component1') //like this
    },


This communication method resembles a socket connection. More information can be found here.

Answer 2

When dealing with non-parent-child relationships in components, the process involves calling methods from one component to another. By adding a $on function to the $root instance and using the $emit function, components can communicate effectively.

In the first component:

$emit function on the $root:

    ...
    c2method: function(){
     this.$root.$emit('component1') //like this
    },


This communication method resembles a socket connection. More information can be found here.

Answer 3

Answer №2

// Creating Vue Components A and B
Vue.component('A', {
    created() {
        this.$root.$refs.A = this;
    },
    methods: {
        foo: function() {
            alert('this is A.foo');
        }
    }
});

Vue.component('B', {
    methods: {
        bar: function() {
            this.$root.$refs.A.foo();
        }
    }
});

Answer 4

// Creating Vue Components A and B
Vue.component('A', {
    created() {
        this.$root.$refs.A = this;
    },
    methods: {
        foo: function() {
            alert('this is A.foo');
        }
    }
});

Vue.component('B', {
    methods: {
        bar: function() {
            this.$root.$refs.A.foo();
        }
    }
});

Answer 5

Answer №3

No need for complicated workarounds.
Vue.js allows us to create events that can be listened to globally.
This means that whenever we want to invoke a specific function, all we have to do is emit this event.
Then, we simply listen for this event within the component and execute the desired method when it occurs.

It's as straightforward as this:

To implement this feature, navigate to main.js and add the following line before creating the Vue instance:

export const eventBus = new Vue(); // added line


new Vue({
    ...
    ...
    ...
    render: h => h(App)
}).$mount('#app');

Instead of directly calling the target function, emit the specified event wherever necessary:

eventBus.$emit('fireMethod');

In the component containing the target function, always listen for this global event:

created() {
    eventBus.$on('fireMethod', () => {
            this.myBelovedMethod();
    })
}

And don't forget to import eventBus at the top of your file.

import {eventBus} from "path/to/main.js";

That's all there is to it - just a few lines of clean code harnessing the power of Vue.js.

Answer 6

No need for complicated workarounds.
Vue.js allows us to create events that can be listened to globally.
This means that whenever we want to invoke a specific function, all we have to do is emit this event.
Then, we simply listen for this event within the component and execute the desired method when it occurs.

It's as straightforward as this:

To implement this feature, navigate to main.js and add the following line before creating the Vue instance:

export const eventBus = new Vue(); // added line


new Vue({
    ...
    ...
    ...
    render: h => h(App)
}).$mount('#app');

Instead of directly calling the target function, emit the specified event wherever necessary:

eventBus.$emit('fireMethod');

In the component containing the target function, always listen for this global event:

created() {
    eventBus.$on('fireMethod', () => {
            this.myBelovedMethod();
    })
}

And don't forget to import eventBus at the top of your file.

import {eventBus} from "path/to/main.js";

That's all there is to it - just a few lines of clean code harnessing the power of Vue.js.

Answer 7

Answer №4

Guidelines provided in the documentation can help resolve this issue

For more information, visit: https://v2.vuejs.org/v2/guide/components.html#Non-Parent-Child-Communication

In cases where components share the same parent, emitting an event that the parent listens to can be a useful approach. By setting the ref property, you can then invoke the c1method from the parent component.

Additional details available at: https://v2.vuejs.org/v2/guide/components.html#Child-Component-Refs

Answer 8

Guidelines provided in the documentation can help resolve this issue

For more information, visit: https://v2.vuejs.org/v2/guide/components.html#Non-Parent-Child-Communication

In cases where components share the same parent, emitting an event that the parent listens to can be a useful approach. By setting the ref property, you can then invoke the c1method from the parent component.

Additional details available at: https://v2.vuejs.org/v2/guide/components.html#Child-Component-Refs

Answer 9

Answer №5

Give this a shot.

<template>
 ...
 <component1 ref='componentOne'>
...
</template>
<script>
  Vue.component('component2', {
    methods: {
     secondaryMethod: function(){
       this.$refs.componentOne.primaryMethod();
     }
   }
  });
</script>

Answer 10

Give this a shot.

<template>
 ...
 <component1 ref='componentOne'>
...
</template>
<script>
  Vue.component('component2', {
    methods: {
     secondaryMethod: function(){
       this.$refs.componentOne.primaryMethod();
     }
   }
  });
</script>

Answer 11

Answer №6

If you're seeking a solution using Vue.js version 3, consider the following:

Visit this link for more information on handling events in Vue.js v3

Click here to see installation instructions for mitt library

    import mitt from 'mitt'
    
    const emitter = mitt()
    
    // listen to an event
    emitter.on('foo', e => console.log('foo', e) )
    
    // listen to all events
    emitter.on('*', (type, e) => console.log(type, e) )
    
    // fire an event
    emitter.emit('foo', { a: 'b' })
    
    // clearing all events
    emitter.all.clear()

Answer 12

If you're seeking a solution using Vue.js version 3, consider the following:

Visit this link for more information on handling events in Vue.js v3

Click here to see installation instructions for mitt library

    import mitt from 'mitt'
    
    const emitter = mitt()
    
    // listen to an event
    emitter.on('foo', e => console.log('foo', e) )
    
    // listen to all events
    emitter.on('*', (type, e) => console.log(type, e) )
    
    // fire an event
    emitter.emit('foo', { a: 'b' })
    
    // clearing all events
    emitter.all.clear()

Answer 13

Answer №7

I stumbled upon a fantastic solution for Vue 3 in this insightful question and answer on Stack Overflow

One key aspect is utilizing Vue3's defineExpose function to expose an internal function outside of the component.

For instance, if you have a setup like this in ComponentA

<template>
    <div>
       <ComponentB ref="componentb" />
    </div>
</template>

where ComponentB contains:

<script setup>
defineExpose( {internal_function} )

function internal_function() {
    console.log( 'hello' )
}
</script>

then, ComponentA can execute:

<script setup>
const componentb = ref(null)

componentb.value.internal_function()
</script>

resulting in hello being displayed in the console.

Answer 14

I stumbled upon a fantastic solution for Vue 3 in this insightful question and answer on Stack Overflow

One key aspect is utilizing Vue3's defineExpose function to expose an internal function outside of the component.

For instance, if you have a setup like this in ComponentA

<template>
    <div>
       <ComponentB ref="componentb" />
    </div>
</template>

where ComponentB contains:

<script setup>
defineExpose( {internal_function} )

function internal_function() {
    console.log( 'hello' )
}
</script>

then, ComponentA can execute:

<script setup>
const componentb = ref(null)

componentb.value.internal_function()
</script>

resulting in hello being displayed in the console.

Answer 15

Answer №8

When working with Vue3, follow these steps:

In the parent component:

    <template>
      <ChildComponent @created="handleCreate" />
    </template>

    export default {
      methods: {
        handleCreate() {
          console.log('The child component has been created.');
        }
      }
    }

In the child component:

    // ChildComponent
    export default {
      created() {
        this.$emit('created');
      }
    }

Answer 16

When working with Vue3, follow these steps:

In the parent component:

    <template>
      <ChildComponent @created="handleCreate" />
    </template>

    export default {
      methods: {
        handleCreate() {
          console.log('The child component has been created.');
        }
      }
    }

In the child component:

    // ChildComponent
    export default {
      created() {
        this.$emit('created');
      }
    }

Using Vue.js: Executing a method in one component from another

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

Answer №7

Answer №8

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