Emit event with parameters in vue

Question

i'm trying to emit function with parameters like that.

template: `
    <div class="searchDropDown">
    <div class="dropdown is-active">
    <div class="dropdown-trigger">
      <button class="button" aria-haspopup="true" aria-controls="dropdown-menu">
        <span>{{selectedItem}}</span>
      </button>
    </div>
    <div class="dropdown-menu" id="dropdown-menu" role="menu">
      <div class="dropdown-content">
        <a class="dropdown-item" v-for="item in drop" @click="$emit('select-menu-item($event)')">
          {{item.name}}
        </a>
      </div>
    </div>
  </div>
    </div>
  `

here is the i'm trying to pass item to method like a parameter.

here is my component which i try to emit function:

<search-component v-bind="searchProps" @select-menu-item="selectedITem($event)"></search-component>

and here is my method:

selectedITem(arg1) {
      console.log("cl")
      console.log(arg1)
    }

here is if i'm not trying to pass parameter everything well work so my method selectedITem is working. When i try to pass parameter like that nothing happened and i'm not getting some error.

Answer 1

The following argument(s) in $emit() are the arguments in your emitted function.

$emit('select-menu-item', $event, 1, 2, 3, 4, "cupcakes")

and in your component method.

selectMenuItem: function(evt, num1, num2, num3, num4, food){

}

And in your actual component markup, you don't need to add arguments, just write the reference to the method without parenthesis.

<search-component v-bind="searchProps" @select-menu-item="selectMenuItem">

---

SAMPLE

window.onload = function(){
 const component = function() {
    return {
       template: `
       <div>
         <button @click="$emit('click-me', 'foobar')">
            Click Me
         </button>
       </div>
       `,
       props: ["data"]
    }
 }

 new Vue({
       el: container,
       data: {},
       components: { "my-component": component(), },
       methods: {
          clickMe: function(str){
            console.log(str);
          }
       }
    });
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>

<div id="container">
  <my-component :data=$data @click-me="clickMe"></my-component>
</div>

Answer 2

just adding more answer from @Albana Clara.

You can merge your parameter along with the event passed.

EXAMPLE:

<search-component v-bind="searchProps" @select-menu-item="selectMenuItem('test', ...arguments)">

selectMenuItem: function(a, b) {
  console.log(a + " " + b);
  // test foobar
}