Implement the use of an instance method within a click event handler

Question

Implement the use of an instance method within a click event handler

I have a Todo module with a delete function. I want to utilize the delete function as an event handler for @click:

<div v-for="todo in todos">
    <v-btn @click="todo.delete">Delete</v-btn>
</div>

However, I am encountering this error:

Invalid handler for event "click": got undefined

javascript vue.js

Answer 1

Answer №1

Check out this codepen demonstration to see the main concept in action: https://codepen.io/nickforddesign/pen/YYwgKx

The problem arises from the fact that the elements in your todos array are missing the necessary method.

<div class="app">
  <ul>
    <li v-for="todo in todos">
      {{ todo }}
      <button @click="todo.delete">Delete</button>
    </li>
  </ul>
</div>

Here's the associated JavaScript:

new Vue({
  el: '.app',
  data() {
    return {
      todos: [{
        name: '1',
        delete() {
          alert(`delete`)
        }
      },{
        name: '2',
        delete() {
          alert(`delete`)
        }
      }]
    }
  }
})

Answer 2

Check out this codepen demonstration to see the main concept in action: https://codepen.io/nickforddesign/pen/YYwgKx

The problem arises from the fact that the elements in your todos array are missing the necessary method.

<div class="app">
  <ul>
    <li v-for="todo in todos">
      {{ todo }}
      <button @click="todo.delete">Delete</button>
    </li>
  </ul>
</div>

Here's the associated JavaScript:

new Vue({
  el: '.app',
  data() {
    return {
      todos: [{
        name: '1',
        delete() {
          alert(`delete`)
        }
      },{
        name: '2',
        delete() {
          alert(`delete`)
        }
      }]
    }
  }
})

Implement the use of an instance method within a click event handler

Answer №1

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