v-for logic in vuejs for dynamic image grid - html

Question

So I kept sketching out algorithms to see how this would work. Kept hitting my head on the keyboard because frankly, nothing seems to work. Basically the hardcoded HTML looks like this:
<div class="row">
<div class="column">
<a href="products.html#drinks"><div id="drinks">
<h2>Drinks</h2>
</div></a>
</div>
<div class="column">
<a href="products.html#preppedfood"><div id="preppedfood">
<h2>Prepped Food</h2>
</div></a>
</div>
<div class="column">
<a href="products.html#coffee"><div id="coffee">
<h2>Coffee Machines</h2>
</div></a>
</div>
<div class="column">
<a href="products.html#snacks"><div id="snacks">
<h2>Snacks</h2>
</div></a>
</div>
</div>
<div class="row">
<div class="column">
<a href="products.html#nuts"><div id="nuts">
<h2>Nuts of All Kinds</h2>
</div></a>
</div>...till the last div class="row" and it's column divs
So the HTML works fine, here's a screenshot:
This is how I want it to look!
But using VueJS so that I can "DRY out" my markup, I'm using the v-for directive like this in the Prods.vue component. Here's the template markup:
<div class="row" v-for="(data, index) in images" v-bind:key="data" v-if="data.ImageId%4 == 0">
<h1>{{index}}</h1>
<div
class="column"
v-for="data in images"
v-bind:key="data"
v-if="computedIndex(index) *4 >= index && index < (computedIndex(index)+1) / 4"
v-lazy-container="{ selector: 'data' }"
>
<a :href="'products/#'+data.Name">
<h4>{{data.H2}}</h4>
<img :src="'../../../static/products/'+data.Name+'.png'" :alt="data.Name+'.png'" />
</a>
</div>
</div>
And the script:
<script>
import Prods from '../../../other/jsons/products.json'
import VueLazyload from 'vue-lazyload'
export default {
data() {
return {images: Prods}
},
methods: {
computedIndex(index) {
return Math.trunc(index/4)
}
}
}
//v-for in row
//v-for in column
</script>
And this is what shows up instead:
enter image description here

Answer 1

Instead of juggling with indices, it seems more straightforward to me to compute the shape of your array to suit your DOM:
computed:
imageRows () {
return this.images.reduce((acc, n, i) => {
i % 4 ? acc[acc.length - 1].push(n) : acc.push([n])
return acc
}, [])
}
To be used something like this:
<table>
<tr v-for="(imageRow, i) in imageRows" :key="i">
<td v-for="image in imageRow" :key="image">
<foo/>
</td>
</tr>
</table>
(Your data seems tabular to me, so I'm showing this example as a <table>, but you can substitute that with <div>'s if you prefer, of course.)