update demo-react-login,

03_source/mobile/src/pages/DemoReactLogin/data/utils.tsx

@@ -0,0 +1,46 @@
+import { useState } from "react";
+
+export const useFormInput = (initialValue = "") => {
+
+    const [ value, setValue ] = useState(initialValue);
+    
+    const handleChange = async e => {
+
+        const tempValue = await e.currentTarget.value;
+        setValue(tempValue);
+    }
+
+    return {
+
+        value,
+        reset: (newValue) => setValue(newValue),
+        onIonChange: handleChange,
+        onKeyUp: handleChange
+    };
+}
+
+export const validateForm = fields => {
+
+	let errors = [];
+
+	fields.forEach(field => {
+
+		if (field.required) {
+
+			const fieldValue = field.input.state.value;
+
+			if (fieldValue === "") {
+
+				const error = {
+
+					id: field.id,
+					message: `Please check your ${ field.id }`,
+				};
+
+				errors.push(error);
+			}
+		}
+	});
+
+	return errors;
+}