add terms checkbox

context/book.tsx

@@ -135,11 +135,16 @@ export default function BookProvider({ children }) {
   const onChangeEvent = (
     event: React.ChangeEvent<React.ElementRef<'input'>>
   ) => {
-    const { name, value } = event.target
+
+    if (event.target.tagName !== 'INPUT') {
+      throw new Error('Woops, this only supports inputs');
+    }
+
+    const { name, value, checked, type } = event.target
 
     dispatch({
       type: ACTIONS.SET_FORM_DATA,
-      payload: { [name]: value },
+      payload: { [name]: type === 'checkbox' ? checked : value },
     })
   }
 
@@ -181,4 +186,4 @@ export default function BookProvider({ children }) {
       {children}
     </BookContext.Provider>
   )
-}
+}