decup_website/textarea.js

18 lines
455 B
JavaScript

const tx = document.getElementsByTagName("textarea");
for (let i = 0; i < tx.length; i++) {
tx[i].setAttribute(
"style",
tx[i].getAttribute("style") +
";height:" +
(tx[i].scrollHeight + 4) +
"px;overflow-y:hidden;"
);
tx[i].addEventListener("change", resize_textarea, false);
}
function resize_textarea(t) {
t = t instanceof Element ? t : this;
t.style.height = "auto";
t.style.height = t.scrollHeight + 4 + "px";
}