Unloading a dynamically-loaded child component in Vue.js from the keep-alive cache

I have a question that is similar to the one mentioned here: Vue.js - Destroy a cached component from keep alive

I am working on creating a Tab System using Vue router, and my code looks something like this:

//My Tab component 
<template>
  <tab>
    <tab-selector />
    <keep-alive>
      <router-view />
      <!-- This router view is used to render one of the childRoutes of the main TabRoute -->
    </keep-alive> 
  </tab>
</template>

<script>
 handleTabClose() {
   //Close tab logic
   this.$destroy(); 
   //Insert router push to be one of the other tabs that have not been closed.
 }
</script>

This is an outline of how the route used by the vue-router would look:

    {
        path: "/tab",
        name: "TabComponent",
        component: () => import("InsertComponentPath"),
        children: [{TabRoute1, TabRoute2, TabRoute3}]
    },

Keep alive is being utilized to maintain State when switching tabs (switching childroutes).

I am trying to remove the childRoute or Component from cache when the tab is closed, but using this.$destroy in my tab component seems to destroy the whole Tab component instead of just the child component within it.

The V-if solution suggested in this and other stack overflow questions won't work because I only want to remove this specific tab from memory, and not all tabs.

Thank you for any assistance.

Answer №1

After diving deep into the documentation on https://v2.vuejs.org/v2/api/#keep-alive, I found a clever solution using the include argument in keep-Alive.

To keep track of the active Tabs, I utilized the router.getmatchedcomponents() method to retrieve the name of the currently displayed tab component and stored it in an array.

In my handleClose() function, I effectively removed the closed tab from the array.

The final implementation had a structure resembling this:

//Tab Component 
<template>
  <tab>
    <tab-selector />
    <keep-alive :include="cacheArr">
      <router-view />
    </keep-alive> 
  </tab>
</template>

<script>
 private cacheArr = []

//Function triggered when opening a new tab
 handleOpen() {
   //Add current Tab to this.cacheArr
   this.cachArr.push(router.getmatchedcomponents().pop().name);
 }

//Function invoked upon closing a tab.
 handleTabClose(name) {
   //Closing logic
   
   //Delete the closed tab from this.cacheArr
   this.cacheArr.splice(this.cacheArr.indexOf(name), 1);
 }
</script>

Answer №2

terminate() {
    this.$destroy();
},

The deactivation method in a nested component functions without any issues.

Answer №3

When dealing with Parent and Child components, I find myself frequently relying on vuex to ensure that updates to any of the nested components are properly reflected throughout the chain of processes.

Once I've made changes to the Vuex store, I make sure to update the key of the relevant component so that it can be re-rendered with the updated data.

In my experience, Vuex effectively resolves most state management issues, eliminating the need for using keep-alive in most situations.

This approach has consistently proven to be effective in resolving problems. Hopefully, this solution can be of help to you if you're facing a similar issue.

If there's any misunderstanding on my part, please feel free to leave a comment and I'll make the necessary adjustments.

Answer №4

If you want to update your component automatically, consider removing the child from the router and then using router.replaceRoutes(routes)

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