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<script lang="ts">
import {random_string} from "$utilities/misc-helpers";
export let id = "textarea-" + random_string(4);
export let disabled = false;
export let rows = 2;
export let cols = 0;
export let name = "";
export let placeholder = "";
export let value;
export let label = "";
export let required = false;
export let errorText = "";
export let errors: Array<string> | undefined = undefined;
$: ariaErrorDescribedBy = id + "__" + "error";
$: attributes = {
"aria-describedby": errorText || errors?.length ? ariaErrorDescribedBy : null,
"aria-invalid": errorText || errors?.length ? "true" : null,
rows: rows || null,
cols: cols || null,
name: name || null,
id: id || null,
disabled: disabled || null,
required: required || null,
} as any;
let textareaElement;
let scrollHeight = 0;
const defaultColorClass = "border-gray-300 focus:border-teal-500 focus:ring-teal-500";
let colorClass = defaultColorClass;
$: if (errorText) {
colorClass = "placeholder-red-300 focus:border-red-500 focus:outline-none focus:ring-red-500 text-red-900 pr-10 border-red-300";
} else {
colorClass = defaultColorClass;
}
$: if (textareaElement) {
scrollHeight = textareaElement.scrollHeight;
}
function on_input(event) {
event.target.style.height = "auto";
event.target.style.height = this.scrollHeight + "px";
}
</script>
<div>
{#if label}
<label for={id} class="block text-sm font-medium text-gray-700">
{label}
{@html required ? "<span class='text-red-500'>*</span>" : ""}
</label>
{/if}
<div class="mt-1">
<textarea
{rows}
{name}
{id}
{...attributes}
style="overflow-y:hidden;min-height:calc(1.5em + .75rem + 2px);{scrollHeight ? 'height:{scrollHeight}px' : ''};"
bind:value
bind:this={textareaElement}
on:input={on_input}
{placeholder}
class="block w-full rounded-md {colorClass} shadow-sm sm:text-sm"
/>
{#if errorText || errors?.length === 1}
<p class="mt-2 text-sm text-red-600" id={ariaErrorDescribedBy}>
{errorText ?? errors[0]}
</p>
{:else if errors && errors.length}
<ul class="mt-2 list-disc" id={ariaErrorDescribedBy}>
{#each errors as error}
<li class="text-sm text-red-600">{error}</li>
{/each}
</ul>
{/if}
</div>
</div>
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