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<script>
let { sendMessage = async (message) => {} } = $props();
let value = $state('');
let disabled = $state(false);
// Entering and removing text from the input area leaves a stray line break behind. This effect
// looks for that scenario and removes it, restoring the "empty" state (and bringing the
// placeholder back again in the process).
$effect(() => {
const trimmed = value.trim();
if (trimmed !== value && trimmed === '') {
value = trimmed;
}
});
async function onsubmit(event) {
event.preventDefault();
disabled = true;
try {
await sendMessage(value);
event.target.closest('form')?.reset();
} finally {
disabled = false;
}
}
function onkeydown(event) {
if (disabled) {
event.preventDefault();
return;
}
let modifier = event.shiftKey || event.altKey || event.ctrlKey || event.metaKey;
if (!modifier && event.key === 'Enter') {
event.preventDefault();
event.target.closest('form')?.requestSubmit();
}
}
function onpaste(event) {
if (disabled) {
event.preventDefault();
}
}
</script>
<form {onsubmit}>
<textarea bind:value hidden {disabled}></textarea>
<div
role="textbox"
tabindex="0"
contenteditable="plaintext-only"
class={{
textarea: true,
disabled,
}}
bind:innerText={value}
{onkeydown}
{onpaste}
data-placeholder="Say something..."
></div>
<button type="submit">»</button>
</form>
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