Time to make our app a little more interactive. I added the following sliders:
- how much ammo to carry
- how much heat to compensate for
- how many double heat sinks you have
I also removed Flamers and Infernos as they don't really fit in this model, and removed minimum range, as not very relevant.
Slider.svelte
It's just copied from Russian losses app:
<script>
export let label, min, max, value, format
let id = Math.random().toString(36).slice(2)
</script>
<label for={id}>{label}:</label>
<input type="range" {min} {max} bind:value id={id} />
<span>{format(value)}</span>
Form.svelte
I might need to add some other control types like checkboxes or radios here, for now it's just all sliders.
<script>
import Slider from "./Slider.svelte"
export let ammoRounds
export let heatPercentage
export let doubleHeatSinksPercentage
</script>
<form>
<Slider label="Ammo for how many rounds" bind:value={ammoRounds} min={1} max={30} format={(v) => `${v}`}/>
<Slider label="Heat to compensate for" bind:value={heatPercentage} min={0} max={100} format={(v) => `${v}%`}/>
<Slider label="How many double heat sinks" bind:value={doubleHeatSinksPercentage} min={0} max={100} format={(v) => `${v}%`}/>
</form>
<style>
form {
display: grid;
grid-template-columns: auto auto auto;
margin-bottom: 1em;
}
</style>
Headers.svelte
Just to keep App small, I moved some static content to Headers component:
<tr>
<th>Name</th>
<th>Damage</th>
<th>Heat</th>
<th>Weight</th>
<th>Ammo Weight</th>
<th>Range</th>
<th>Value</th>
<th>Cost</th>
<th>Ratio</th>
</tr>
App.svelte
I need to do some trickery with row.id to make reactivity work the way I want. What I'm doing here isn't a particularly elegant solution.
<script>
import {sortBy} from "lodash"
import data from "./data.json"
import Form from "./Form.svelte"
import Headers from "./Headers.svelte"
import Row from "./Row.svelte"
let ammoRounds = 10
let heatPercentage = 80
let doubleHeatSinksPercentage = 0
let round100 = (v) => Math.round(v * 100) / 100
$: heatSinkingPerTon = 3.0 + 3.0 * doubleHeatSinksPercentage / 100
$: costPerHeat = (heatPercentage / 100) / heatSinkingPerTon
let sortedData
$: {
for(let row of data) {
row.value = row.shots * row.baseDamage
row.ammoWeight = round100(ammoRounds * row.ammoTonnagePerShot)
row.cost = round100(row.tonnage + row.ammoWeight + row.heat * costPerHeat)
row.ratio = round100(row.value / row.cost)
row.id = Math.random().toString(36).slice(2)
}
sortedData = sortBy(data, [(x) => -x.ratio, (x) => x.name])
}
</script>
<h1>BATTLETECH Weapons Data</h1>
<Form bind:ammoRounds bind:heatPercentage bind:doubleHeatSinksPercentage />
<table>
<Headers />
{#each sortedData as row (row.id)}
<Row data={row} />
{/each}
</table>
<style>
:global(body) {
margin: 0;
min-height: 100vh;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
table :global(tr):nth-child(even) {
background-color: #f2f2f2;
}
table :global(tr):nth-child(odd) {
background-color: #e0e0e0;
}
</style>
Story so far
I deployed this on GitHub Pages, you can see it here.
Coming next
Over the next few episodes I'll continue to improve the app.
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