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<script lang="ts">
import { createEventDispatcher } from "svelte";
export let value = "";
export let minRows = 1;
export let maxRows: null | number = null;
export let placeholder = "";
export let disabled = false;
export let autofocus = false;
const dispatch = createEventDispatcher<{submit: void}>();
$: minHeight = `${1 + minRows * 1.5}em`;
$: maxHeight = maxRows ? `${1 + maxRows * 1.5}em` : `auto`;
function handleKeydown(event: KeyboardEvent) {
// submit on enter
if (event.key === "Enter" && !event.shiftKey) {
event.preventDefault();
dispatch("submit"); // use a custom event instead of `event.target.form.requestSubmit()` as it does not work on Safari 14
}
}
let textareaElement: HTMLTextAreaElement;
</script>
<div class="relative flex-1 min-w-0">
<pre
class="invisible py-3"
aria-hidden="true"
style="min-height: {minHeight}; max-height: {maxHeight}">{value + " \n"}</pre>
<textarea
enterkeyhint="send"
tabindex="0"
rows="1"
class="absolute m-0 w-full h-full top-0 resize-none border-0 bg-transparent p-3 focus:ring-0 focus-visible:ring-0 dark:bg-transparent outline-none scrollbar-custom overflow-x-hidden overflow-y-scroll"
bind:value
bind:this={textareaElement}
{disabled}
on:keydown={handleKeydown}
{placeholder}
{autofocus}
/>
</div>
<style>
pre,
textarea {
font-family: inherit;
box-sizing: border-box;
line-height: 1.5;
}
</style>
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