forked from MapComplete/MapComplete
24 lines
667 B
Svelte
24 lines
667 B
Svelte
<script lang="ts">
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import { UIEventSource } from "../../Logic/UIEventSource"
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import { onDestroy } from "svelte"
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/**
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* For some stupid reason, it is very hard to let {#if} work together with UIEventSources, so we wrap then here
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*/
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export let condition: UIEventSource<boolean>
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let _c = condition.data
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onDestroy(
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condition.addCallback((c) => {
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/* Do _not_ abbreviate this as `.addCallback(c => _c = c)`. This is the same as writing `.addCallback(c => {return _c = c})`,
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which will _unregister_ the callback if `c = true`! */
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_c = c
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return false
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})
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)
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</script>
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{#if _c}
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<slot />
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{:else}
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<slot name="else" />
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{/if}
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