Vue warning: An issue occurred in the nextTick function: "NotFoundError: The operation insertBefore failed to execute on Node"

I've encountered a puzzling issue in my Vue web app where sporadic error messages are causing my app to come to a standstill.

Error message 1:

[Vue warn]: Error in nextTick: "NotFoundError: Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node."

Error message 2:

DOMException: Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node.

Stack trace for Error Message 1:

https://i.sstatic.net/s806Q.png

Stack trace for Error Message 2:

https://i.sstatic.net/yuAcW.png

By dissecting the stack trace, I've identified that the issue stems from the setListingFromCoords() method within my dashboard component. It's not related to the vuex "getListingsFromCoords" action as the "data" is correctly logged and data.results are being filled accurately as well. The error seems to lie within this.listings = data.results.

Here is the setListingFromCoords() method in my dashboard component:

setListingFromCoords() {
    return new Promise((resolve, reject) => {
        this.$store.dispatch(
            "getListingsFromCoords"
        ).then((data) => {
            console.log(data); // "data" is returned correctly here
            this.listings = data.results; // CODE BREAKS HERE
            this.previous = data.previous;
            this.hasPrevious = data.hasPrevious;
            this.next = data.next;
            this.hasNext = data.hasNext;
            resolve();
        }).catch((err) => {
            reject(err);
        });
    });
},

Within the template of my dashboard component, I have a card component that iterates over the listings returned by the setListingFromCoords method. This part seems to be triggering the Vue errors, as it's the only component reliant on listings.

<card
    v-for="(listing, index) in listings"
    v-bind:index="index"
    v-bind:key="listing._id">
</card>

Could someone verify if my observations are accurate? How can I fix this issue in my code and what's causing these errors to surface?

Answer №1

Encountered a similar issue when working with vue-router, only to discover that my <router-view /> was inadvertently placed inside a vue-fragment.

UPDATE

The culprit behind this issue was identified in vue-fragment version 1.5.2 – the solution is to revert back to version 1.5.1.

Additionally, following @jai-kumaresh's advice, the caret symbol (^) in the package.json for

"vue-fragment": "^1.5.1"
should be removed to ensure a precise installation of the specified version.

UPDATE October 2021

For users of Vue 3, the vue-fragment package is now redundant as multiple elements can be effortlessly added directly to the root element.

Answer №2

Quoted from one of the VueJS core team members, @LinusBorg:

The error message indicates a DOM exception where Vue attempted to insert an element before another one that no longer exists in the DOM.

Based on the provided information, it seems that Vue is trying to add an element before another one in the DOM that was created by v-for. Essentially, Vue is attempting to update the existing list of elements to reflect changes made to the list, but is encountering a failure.

While I don't see a direct cause for this error, my suspicion is that there may be a duplicate listing._id present.

LinusBorg's suspicions turned out to be accurate. The presence of a duplicate key in my dashboard component was the cause of the error.

Answer №3

Dealing with the Vue Slick slider, I encountered a similar issue. The problem was resolved by swapping out a v-if directive surrounding the component with a v-show directive. Initially, I eliminated the :key in the loop responsible for generating the slides, but eventually, I was able to incorporate the keys back in successfully.

Answer №4

Encountering this issue has been common while utilizing <template> elements with a v-if statement.

We found that switching to <div> resolved the problem.

Although it resulted in some excess HTML, it successfully resolved the problem.

Answer №5

I encountered the same issue as well.

Involved Elements: I utilized my own Profile Form component along with a youtube component.

<youtube
    v-if="profileData.showYoutube && profileData.youtubeUrl"
    :video-id="$youtube.getIdFromUrl(profileData.youtubeUrl)"
/>

Issue: When a user accesses a profile with the loaded youtube component and then clicks on "Create Profile", the user is redirected by vue-router from site.com/some_profile_name to site.com/create_profile. Additionally, the profileData is cleared out since the user intends to create a new profile.

In this scenario, both components are being reused, but the youtube component, due to the cleaning of profileData, was causing the problem:

[Vue warn]: Error in nextTick: "NotFoundError: Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node."

Solution: I managed to resolve this issue by encapsulating the youtube component within a <div> tag (<template> also resulted in an error):

<div v-if="profileData.showYoutube && profileData.youtubeUrl">
    <youtube :video-id="$youtube.getIdFromUrl(profileData.youtubeUrl)"/>
</div>

Answer №6

  1. It is recommended to downgrade from version 1.52 of vue-fragment to version 1.51 without adding "^" to the version number. Stick with 1.51 for now as the bug exists in version 1.52.

2. If you are still facing this issue, try removing the fragment tags around.

Instead of:

<template>
   <fragment><router-view></router-view></fragment>
</template>

Just use:

<template>
    <router-view></router-view> 
</template>

Alternatively, you can wrap the router-view with other HTML tags but make sure the components inside can still be used.

Answer №7

Recently, I made the switch to vue-frag for the following reasons:

  • It is a straightforward replacement (just a small tweak to the import statement)
  • It generates cleaner code without scattered <!-- --> tags
  • Includes a handy build-time plugin that eliminates the need for the <fragment> tag in many scenarios
  • Appears to have more recent updates and maintenance

Answer №8

Encountering a similar issue, I found a solution.

<v-btn v-if="someCond" ... />
<v-btn v-if="!someCond" .../>

By changing the latter statement to use "v-else", the problem was resolved.

<v-btn v-if="someCond" ... />
<v-btn v-else .../>

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