fix textarea demo

index.html

@@ -42,7 +42,7 @@
 				button.disabled = true;
 				await nextTick();
 				await sleep();
-				const from = document.getElementById("from").textContent;
+				const from = document.getElementById("from").value;
 				const src_lang = document.getElementById("src_lang").value;
 				const tgt_lang = document.getElementById("tgt_lang").value;
 				const to = await translator(from, { src_lang, tgt_lang });