Expand only the clicked data in Vue v-for loop

Question

Expand only the clicked data in Vue v-for loop

I've come across a challenge in my Vue project with Firebase. I'm using v-for to fetch data from the Firebase database, and each item has a "description" value. I want to be able to expand and show only the description of the clicked item when users click anywhere on the table row (tr). However, the issue is that when I click on the tbody, all description values expand. How can I resolve this?

Here's my current code:

<tbody v-for="item in items" :key="item.id" @click="isClicked = !isClicked">

        <tr>
          <td>
            {{item.name}} 
          </td>
          <td>
            {{item.surname}}
          </td>
          <td>
            {{item.explanation}}
          </td>
        <td>
          <span @click="isDelete(item)">X</span>
        </td>
        </tr>
        <tr v-if="isClicked === true">  
          {{item.desc}}
        </tr>
      </tbody>

Thank you for any assistance provided.

javascript vue.js v-for

Answer 1

Answer №1

Retrieve the position of the loop:

v-for="(element, position) in elements"

Create a function that takes the position as a parameter:

selectActiveElement(position)

Set the position value to the isSelected variable:

selectActiveElement(position) {
  this.isSelected = position
}

Now use this as your click action and compare the isSelected variable in your row:

<tbody v-for="(element, position) in elements" :key="element.id" @click="selectActiveElement(position)">

Show only the specific row if the position matches:

<tr v-if="isSelected === position">
  <td> {{ element.description }} </td>
</tr>

Answer 2

Retrieve the position of the loop:

v-for="(element, position) in elements"

Create a function that takes the position as a parameter:

selectActiveElement(position)

Set the position value to the isSelected variable:

selectActiveElement(position) {
  this.isSelected = position
}

Now use this as your click action and compare the isSelected variable in your row:

<tbody v-for="(element, position) in elements" :key="element.id" @click="selectActiveElement(position)">

Show only the specific row if the position matches:

<tr v-if="isSelected === position">
  <td> {{ element.description }} </td>
</tr>

Answer 3

Answer №2

To effectively address the issue in your code, it is crucial to grasp its functionality. Currently, you have a setup where clicks on the tbody element toggle the flag isClicked between true and false. This flag controls the visibility of all items using v-if directives. Consequently, any change in the flag triggers a reevaluation of all descriptions, leading to undesired outcomes.

The approach of listening for clicks on the entire tbody is flawed. Instead, consider capturing clicks on individual tr elements to determine which specific row is clicked. By storing the id of the clicked row, you can then display the corresponding item's description.

However, there is a workaround that can align your code with the desired behavior. Here is the revised implementation:

<tbody v-for="item in items" :key="item.id">
    <tr @click="isClicked = item.id">
        <td>{{item.name}}</td>
        <td>{{item.surname}}</td>
        <td>{{item.explanation}}</td>
        <td><span @click="isDelete(item)">X</span></td>
    </tr>
    <tr v-if="isClicked === item.id">  
        {{item.desc}}
    </tr>
</tbody>

Implementing these changes should help achieve the intended functionality. Best of luck!

Answer 4

To effectively address the issue in your code, it is crucial to grasp its functionality. Currently, you have a setup where clicks on the tbody element toggle the flag isClicked between true and false. This flag controls the visibility of all items using v-if directives. Consequently, any change in the flag triggers a reevaluation of all descriptions, leading to undesired outcomes.

The approach of listening for clicks on the entire tbody is flawed. Instead, consider capturing clicks on individual tr elements to determine which specific row is clicked. By storing the id of the clicked row, you can then display the corresponding item's description.

However, there is a workaround that can align your code with the desired behavior. Here is the revised implementation:

<tbody v-for="item in items" :key="item.id">
    <tr @click="isClicked = item.id">
        <td>{{item.name}}</td>
        <td>{{item.surname}}</td>
        <td>{{item.explanation}}</td>
        <td><span @click="isDelete(item)">X</span></td>
    </tr>
    <tr v-if="isClicked === item.id">  
        {{item.desc}}
    </tr>
</tbody>

Implementing these changes should help achieve the intended functionality. Best of luck!

Expand only the clicked data in Vue v-for loop

Answer №1

Answer №2

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