Exploring the attributes of cycled values in Vue.js

Currently, I am iterating over a list as shown below:

<li v-for="item in filteredParentItems"
      v-if="item.action === 'list'"
      v-on:click="getNextPath"
      v-bind:data-next-path="item.nextPath"
      v-bind:data-action="item.action"
      v-bind:class="{ active: isActive }"
      class="item">
        {{item.name}}
        <i class="fa fa-arrow-right" aria-hidden="true"></i>
  </li>

To determine if an item is active, I utilize the `isActive` computed function to compare the path with the breadcrumb path stored in Vuex:

computed: {
    isActive () {
      return this.nextPath === this.$store.state._breadcrumbPath;
    }
  }

A challenge arises because I do not have access to `item.nextPath` within the computed function since the `li` element is not set up as its own component. Is there a way to pass the actual item into the `isActive` function to retrieve its property?

Answer №1

One cannot pass values into a computed property, but there is a workaround. You can convert isActive into a method and pass item as an argument.

Modify the li:

v-bind:class="{ active: isActive(item) }"

Then transform isActive into a method that works on the specific item:

methods: {
  isActive (item) {
    return item.nextValue === this.$store.state._breadcrumbValue;
  }
}

Answer №2

To achieve this functionality within your class binding, follow these steps:

<li v-for="item in filteredParentItems"
  v-if="item.action === 'list'"
  v-on:click="getNextPath"
  v-bind:data-next-path="item.nextPath"
  v-bind:data-action="item.action"
  v-bind:class="{ active: item.nextPath === _breadcrumbPath }"
  class="item">
    {{item.name}}
    <i class="fa fa-arrow-right" aria-hidden="true"></i>
</li>

Next, make changes to your components script as shown below:

computed: {

  _breadcrumbPath () {
    return this.$store.state._breadcrumbPath;
  },
  ...

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