fix(ui5-input): prevent js error when element is removed from DOM (#2405)

Author: fifoosid

packages/base/src/StaticAreaItem.js

@@ -87,7 +87,7 @@ class StaticAreaItem {
 			this._updateFragment();
 		}
 		await RenderScheduler.whenDOMUpdated(); // Wait for the content of the ui5-static-area-item to be rendered
-		return this.staticAreaItemDomRef.shadowRoot;
+		return this.staticAreaItemDomRef && this.staticAreaItemDomRef.shadowRoot;
 	}
 }
 

packages/main/src/Input.js

@@ -800,7 +800,7 @@ class Input extends UI5Element {
 
 	async _getPopover() {
 		const staticAreaItem = await this.getStaticAreaItemDomRef();
-		return staticAreaItem.querySelector("[ui5-popover]");
+		return staticAreaItem && staticAreaItem.querySelector("[ui5-popover]");
 	}
 
 	enableSuggestions() {