textareaAutoResize directive added and applied to textareas.

directives/textareaAutoHeight.js

@@ -0,0 +1,8 @@
+export default {
+ name: "textareaAutoHeight",
+ update(element) {
+  if (element.scrollHeight !== element.clientHeight) {
+   element.style.minHeight = `${element.scrollHeight}px`;
+  }
+ }
+}