Ways to transfer data through customized events utilizing an event bus in Vue.js 2

Question

Ways to transfer data through customized events utilizing an event bus in Vue.js 2

I'm currently utilizing Vue.js version 2.5.x.

Within my small project, I have set up an event bus (similar to the example provided here). The event bus has been globally registered in the Vue prototype as $eventBus.

Next, I developed a component that emits an event using the following code snippet:

this.$eventBus.$emit('actionCompleted')

Additionally, I created another component that listens for this event and triggers its own function (myMethod) upon receiving it, as demonstrated below:

export default {
  created: function () {
      this.$eventBus.$on('actionCompleted', this.myMethod)
  },
  methods: {
    myMethod () {
        console.log('myMethod called')
    }
  }
}

Everything is functioning correctly so far, but now I am facing a question: how can I include an object when emitting my custom event in order to pass additional information to the listeners?

javascript vue.js vuejs2

Answer 1

Answer №1

To pass your parameter as the second argument, use the following code:

this.$eventBus.$emit('actionCompleted', objectParams)

export default {
  created: function () {
      this.$eventBus.$on('actionCompleted', this.myMethod)
  },
  methods: {
    myMethod (objectParams) {
        console.log('myMethod called', objectParams)
    }
  }
}

If you want to learn more about this concept, check out this helpful tutorial.

Answer 2

To pass your parameter as the second argument, use the following code:

this.$eventBus.$emit('actionCompleted', objectParams)

export default {
  created: function () {
      this.$eventBus.$on('actionCompleted', this.myMethod)
  },
  methods: {
    myMethod (objectParams) {
        console.log('myMethod called', objectParams)
    }
  }
}

If you want to learn more about this concept, check out this helpful tutorial.

Answer 3

Answer №2

If you need to create an event for a single argument, you can do it like this:

this.$eventBus.$emit('actionCompleted',args)

To pass multiple arguments, separate them by commas.

Here is how you can pass multiple arguments:

this.$eventBus.$emit('actionCompleted',args1, args2 ...)

After passing the arguments, you can retrieve them as shown below [for a single argument]:

export default {
  created: function () {
      this.$eventBus.$on('actionCompleted', this.myMethod)
  },
  methods: {
    myMethod (args) {
        console.log('myMethod called', args)
    }
  }
}

Answer 4

If you need to create an event for a single argument, you can do it like this:

this.$eventBus.$emit('actionCompleted',args)

To pass multiple arguments, separate them by commas.

Here is how you can pass multiple arguments:

this.$eventBus.$emit('actionCompleted',args1, args2 ...)

After passing the arguments, you can retrieve them as shown below [for a single argument]:

export default {
  created: function () {
      this.$eventBus.$on('actionCompleted', this.myMethod)
  },
  methods: {
    myMethod (args) {
        console.log('myMethod called', args)
    }
  }
}

Answer 5

Answer №3

To send an object through your event bus, you can simply emit it like so:

this.$eventBus.$emit('completedAction', this.myObject)

Then, to catch the emitted object, you can use the following method:

export default {
  created: function () {
      this.$eventBus.$on('completedAction', this.handleCompletedAction)
  },
  methods: {
    handleCompletedAction (object) {
        console.log('Handling completed action:', object)
    }
  }
}

Answer 6

To send an object through your event bus, you can simply emit it like so:

this.$eventBus.$emit('completedAction', this.myObject)

Then, to catch the emitted object, you can use the following method:

export default {
  created: function () {
      this.$eventBus.$on('completedAction', this.handleCompletedAction)
  },
  methods: {
    handleCompletedAction (object) {
        console.log('Handling completed action:', object)
    }
  }
}

Ways to transfer data through customized events utilizing an event bus in Vue.js 2

Answer №1

Answer №2

Answer №3

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