fix(textarea): reposition textarea when keybard appears (#18098)

fixes #17847

core/src/components/textarea/textarea.scss

@@ -57,8 +57,6 @@
 // --------------------------------------------------
 
 :host-context(ion-item) {
-  position: static;
-
   align-self: baseline;
 }
 
@@ -79,7 +77,8 @@
   display: block;
 
   width: 100%;
-  height: 100%;
+  max-width: 100%;
+  max-height: 100%;
 
   border: 0;
 
@@ -106,3 +105,19 @@
 .native-textarea[disabled] {
   opacity: .4;
 }
+
+// Input Cover: Unfocused
+// --------------------------------------------------
+// The input cover is the div that actually receives the
+// tap/click event when scroll assist is configured to true.
+// This make it so the native input element is not clickable.
+// This will only show when the scroll assist is configured
+// otherwise the .input-cover will not be rendered at all
+// The input cover is not clickable when the input is disabled
+.cloned-input {
+  @include position(0, null, null, 0);
+
+  position: absolute;
+
+  pointer-events: none;
+}

core/src/components/textarea/textarea.tsx

@@ -164,12 +164,30 @@ export class Textarea implements ComponentInterface {
    */
   @Event() ionFocus!: EventEmitter<void>;
 
+  /**
+   * Emitted when the input has been created.
+   * @internal
+   */
+  @Event() ionInputDidLoad!: EventEmitter<void>;
+
+  /**
+   * Emitted when the input has been removed.
+   * @internal
+   */
+  @Event() ionInputDidUnload!: EventEmitter<void>;
+
   componentWillLoad() {
     this.emitStyle();
   }
 
   componentDidLoad() {
     this.debounceChanged();
+
+    this.ionInputDidLoad.emit();
+  }
+
+  componentDidUnload() {
+    this.ionInputDidUnload.emit();
   }
 
   /**

core/src/utils/input-shims/hacks/common.ts

@@ -2,7 +2,7 @@ const cloneMap = new WeakMap<HTMLElement, HTMLElement>();
 
 export function relocateInput(
   componentEl: HTMLElement,
-  inputEl: HTMLInputElement,
+  inputEl: HTMLInputElement | HTMLTextAreaElement,
   shouldRelocate: boolean,
   inputRelativeY = 0
 ) {
@@ -17,11 +17,11 @@ export function relocateInput(
   }
 }
 
-export function isFocused(input: HTMLInputElement): boolean {
+export function isFocused(input: HTMLInputElement | HTMLTextAreaElement): boolean {
   return input === (input as any).getRootNode().activeElement;
 }
 
-function addClone(componentEl: HTMLElement, inputEl: HTMLInputElement, inputRelativeY: number) {
+function addClone(componentEl: HTMLElement, inputEl: HTMLInputElement | HTMLTextAreaElement, inputRelativeY: number) {
   // this allows for the actual input to receive the focus from
   // the user's touch event, but before it receives focus, it
   // moves the actual input to a location that will not screw
@@ -34,7 +34,7 @@ function addClone(componentEl: HTMLElement, inputEl: HTMLInputElement, inputRela
   const parentEl = inputEl.parentNode!;
 
   // DOM WRITES
-  const clonedEl = inputEl.cloneNode(false) as HTMLInputElement;
+  const clonedEl = inputEl.cloneNode(false) as HTMLElement;
   clonedEl.classList.add('cloned-input');
   clonedEl.tabIndex = -1;
   parentEl.appendChild(clonedEl);

core/src/utils/input-shims/hacks/hide-caret.ts

@@ -1,6 +1,6 @@
 import { isFocused, relocateInput } from './common';
 
-export function enableHideCaretOnScroll(componentEl: HTMLElement, inputEl: HTMLInputElement | undefined, scrollEl: HTMLIonContentElement | undefined) {
+export function enableHideCaretOnScroll(componentEl: HTMLElement, inputEl: HTMLInputElement | HTMLTextAreaElement | undefined, scrollEl: HTMLIonContentElement | undefined) {
   if (!scrollEl || !inputEl) {
     return () => { return; };
   }

core/src/utils/input-shims/hacks/scroll-assist.ts

@@ -5,7 +5,7 @@ import { getScrollData } from './scroll-data';
 
 export function enableScrollAssist(
   componentEl: HTMLElement,
-  inputEl: HTMLInputElement,
+  inputEl: HTMLInputElement | HTMLTextAreaElement,
   contentEl: HTMLIonContentElement,
   keyboardHeight: number
 ) {
@@ -45,7 +45,7 @@ export function enableScrollAssist(
 
 function jsSetFocus(
   componentEl: HTMLElement,
-  inputEl: HTMLInputElement,
+  inputEl: HTMLInputElement | HTMLTextAreaElement,
   contentEl: HTMLIonContentElement,
   keyboardHeight: number
 ) {

core/src/utils/input-shims/input-shims.ts

@@ -25,7 +25,7 @@ export function startInputShims(
   const scrollAssistMap = new WeakMap<HTMLElement, () => void>();
 
   function registerInput(componentEl: HTMLElement) {
-    const inputEl = (componentEl.shadowRoot || componentEl).querySelector('input');
+    const inputEl = (componentEl.shadowRoot || componentEl).querySelector('input') || (componentEl.shadowRoot || componentEl).querySelector('textarea');
     const scrollEl = componentEl.closest('ion-content');
 
     if (!inputEl) {
@@ -70,9 +70,9 @@ export function startInputShims(
   }
 
   // Input might be already loaded in the DOM before ion-device-hacks did.
-  // At this point we need to look for all the ion-inputs not registered yet
+  // At this point we need to look for all of the inputs not registered yet
   // and register them.
-  const inputs = Array.from(doc.querySelectorAll('ion-input'));
+  const inputs = Array.from(doc.querySelectorAll('ion-input, ion-textarea')) as HTMLElement[];
   for (const input of inputs) {
     registerInput(input);
   }