"How to insert pictures into the table header in vue.js 3"

Question

I am using v-data-table from vue.js 3 and want to insert a picture in the table header. So I tried overriding the table header template:

<code><template v-for="header in headers" v-slot:[`header.${header.value}`]=" ;{ headers }">

     {{ header.text }}

</template>
</code>

This method is effective. However, if I include the image like this, I get an error:

<code><template v-for="header in headers" v-slot:[`header.${header.value}`]=" ;{ headers }">
    {{ header.text }}
    <span v-if="header.text=='SomeText'"><img :src="require('@/assets/image_1.png')" /></span> ;
    <span v-if="header.text=='SomeOtherText'"><img :src="require('@/assets/image_2.png')" /></span> ;
</template>
</code>

The error message is as follows:

14:3 error Elements in iteration expect to have 'v-bind:key' directives vue/require-v-for-key

I would be happy if anyone could offer advice.

Answer 1

Attempt to type a nested element based on the index of the current heading:

<template v-for="(header,i) in headers" v-slot:[`header.${header.value}`]="{ headers }">
    <span :key="'text'+i"> {{ header.text }}</span>
    <span :key="'img1'+i" v-if="header.text=='SomeText'"><img :src="require('@/assets/image_1.png')" /></span>
    <span :key="'img2'+i" v-if="header.text=='SomeOtherText'"><img :src="require('@/assets/image_2.png')" /></span>
</template>