Added TextAreaInput for textarea resizing

Signed-off-by: Florian Bouillon <florian.bouillon@delta-wings.net>

src/modules/TextAreaInput.ts

@@ -0,0 +1,24 @@
+import InputIdentity from "./Interfaces/InputIdentity"
+import DefaultInput from "./DefaultInput"
+import FormManager from "../FormManager"
+
+export default class TextAreaInput extends DefaultInput {
+
+	public constructor(element: HTMLElement, form: FormManager) {
+		super(element, form)
+		element.style.resize = 'none'
+		const event = () => {
+			element.style.minHeight = "5px"
+			element.style.minHeight = `calc(2em + ${element.scrollHeight+5}px)`
+		}
+		;(element as HTMLTextAreaElement).addEventListener('keydown', event)
+		;(element as HTMLTextAreaElement).addEventListener('keypress', event)
+
+	}
+
+	public static identity: InputIdentity = {
+		input: TextAreaInput,
+		tagName: 'textarea',
+		attributes: 'data-autoresize'
+	}
+}