Swipeable list items in React Native - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the component needed for swipeable list items in React Native.

React Native

import { [1] } from 'react-native-gesture-handler';

Drag options to blanks, or click blank then click option'

AFlatList

BSwipeable

CScrollView

DTouchableOpacity

Attempts:

3 left

💡 Hint

Common Mistakes

Importing FlatList instead of Swipeable

Using ScrollView which doesn't support swipe gestures

Forgetting to import from 'react-native-gesture-handler'

The Swipeable component from react-native-gesture-handler enables swipe gestures on list items.

2fill in blank

medium

Complete the code to render a swipeable list item with a right action button.

React Native

const renderRightActions = () => (
  <View style={{backgroundColor: 'red', justifyContent: 'center', alignItems: 'center', width: 80}}>
    <Text style={{color: 'white'}}>Delete</Text>
  </View>
);

return (
  <[1] renderRightActions={renderRightActions}>
    <View style={{padding: 20, backgroundColor: 'white'}}>
      <Text>Swipe me</Text>
    </View>
  </[1]>
);

Drag options to blanks, or click blank then click option'

ASwipeable

BTouchableOpacity

CFlatList

DScrollView

Attempts:

3 left

💡 Hint

Common Mistakes

Using TouchableOpacity which doesn't support swipe actions

Using FlatList or ScrollView which are list containers, not swipe wrappers

The Swipeable component wraps the list item and accepts renderRightActions to show buttons when swiped.

3fill in blank

hard

Fix the error in the code to close the swipeable item after pressing the delete button.

React Native

const swipeableRef = useRef(null);

const closeSwipe = () => {
  if (swipeableRef.current) {
    swipeableRef.current.[1]();
  }
};

Drag options to blanks, or click blank then click option'

Aclose

Bdismiss

CswipeClose

DcloseSwipe

Attempts:

3 left

💡 Hint

Common Mistakes

Using a non-existent method name like dismiss or swipeClose

Trying to call closeSwipe which is the function itself

The Swipeable component has a close() method to close the swipe actions programmatically.

4fill in blank

hard

Fill both blanks to create a swipeable list item that calls a function when deleted.

React Native

const onDelete = () => {
  console.log('Item deleted');
};

return (
  <Swipeable
    ref={swipeableRef}
    renderRightActions={() => (
      <TouchableOpacity onPress={() => { swipeableRef.current.[1](); [2](); }} style={{backgroundColor: 'red', justifyContent: 'center', alignItems: 'center', width: 80}}>
        <Text style={{color: 'white'}}>Delete</Text>
      </TouchableOpacity>
    )}
  >
    <View style={{padding: 20, backgroundColor: 'white'}}>
      <Text>Swipe me</Text>
    </View>
  </Swipeable>
);

Drag options to blanks, or click blank then click option'

AcloseSwipe

BonDelete

Cclose

DdeleteItem

Attempts:

3 left

💡 Hint

Common Mistakes

Calling onDelete before closing swipe

Using wrong method names like closeSwipe or deleteItem

When pressing delete, first call close() on the swipeable ref to close the swipe, then call onDelete() to handle deletion.

5fill in blank

hard

Fill all three blanks to create a swipeable list with multiple items and delete functionality.

React Native

const [items, setItems] = useState(['Apple', 'Banana', 'Cherry']);
const swipeableRefs = useRef(new Map());

const deleteItem = (index) => {
  swipeableRefs.current.get(index).[1]();
  setItems(items.filter((_, i) => i !== index));
};

return (
  <FlatList
    data={items}
    keyExtractor={(item, index) => index.toString()}
    renderItem={({item, index}) => (
      <Swipeable
        ref={ref => swipeableRefs.current.set(index, ref)}
        renderRightActions={() => (
          <TouchableOpacity onPress={() => deleteItem(index)} style={{backgroundColor: 'red', justifyContent: 'center', alignItems: 'center', width: 80}}>
            <Text style={{color: 'white'}}>[2]</Text>
          </TouchableOpacity>
        )}
      >
        <View style={{padding: 20, backgroundColor: 'white'}}>
          <Text>{ [3] }</Text>
        </View>
      </Swipeable>
    )}
  />
);

Drag options to blanks, or click blank then click option'

Aclose

BDelete

Citem

Dopen

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'open' instead of 'close' to close swipe

Showing wrong button text or item text

Not managing refs correctly for multiple items

To delete an item, first call close() on its swipeable ref, then update the list. The button text is 'Delete' and the displayed text is the item name.

Practice

1. What is the main purpose of using Swipeable in React Native list items?

easy

A. To allow users to swipe list items and reveal hidden actions

B. To automatically sort list items alphabetically

C. To add animations when list items are tapped

D. To disable scrolling on the list

Solution

1. Step 1: Understand Swipeable component role

   The Swipeable component enables swipe gestures on list items.

2. Step 2: Identify the effect of swiping

   Swiping reveals hidden buttons or actions like delete or edit.

3. Final Answer:

   To allow users to swipe list items and reveal hidden actions -> Option A

4. Quick Check:

   Swipeable = Reveal actions on swipe [OK]

Hint: Swipeable shows hidden buttons when you swipe list items [OK]

Common Mistakes:

• Thinking Swipeable sorts items automatically
• Confusing swipe with tap animations
• Assuming Swipeable disables scrolling

2. Which prop is used to define the buttons shown when swiping a list item to the right in Swipeable?

easy

A. renderLeftActions

B. renderRightActions

C. onSwipeRight

D. swipeButtons

Solution

1. Step 1: Recall Swipeable props for swipe actions

   renderLeftActions defines buttons shown when swiping to the right (revealing left side).

2. Step 2: Match prop to swipe direction

   Swiping to the right reveals buttons from the left side, so renderLeftActions is correct.

3. Final Answer:

   renderLeftActions -> Option A

4. Quick Check:

   Right swipe buttons = renderLeftActions [OK]

Hint: Use renderLeftActions for buttons on right swipe [OK]

Common Mistakes:

• Confusing renderRightActions with right swipe
• Using non-existent prop onSwipeRight
• Assuming swipeButtons is a valid prop

3. Given this code snippet, what will happen when the user swipes the list item to the left?

import { Swipeable } from 'react-native-gesture-handler';

function ListItem() {
  return (
     }
    >
      Message
    
  );
}

medium

A. The 'Archive' button appears when swiping left to right

B. No button appears on swipe

C. The 'Archive' button appears when swiping right to left

D. The list item deletes immediately on swipe

Solution

1. Step 1: Understand renderLeftActions behavior

   renderLeftActions shows buttons when swiping to the right (revealing left side).

2. Step 2: Analyze swipe to the left

   Swiping to the left reveals right side actions via renderRightActions, which is not provided, so no button appears.

3. Final Answer:

   No button appears on swipe -> Option B

4. Quick Check:

   Swipe left requires renderRightActions [OK]

Hint: Swipe left reveals right actions (renderRightActions) [OK]

Common Mistakes:

• Thinking renderLeftActions shows on swipe left
• Confusing the swipe direction for left actions
• Expecting immediate deletion on swipe

4. What is wrong with this code snippet that tries to add swipe actions?

import { Swipeable } from 'react-native-gesture-handler';

function Item() {
  return (
     Delete}
    >
      Item
    
  );
}

medium

A. Swipeable must wrap a View, not Text

B. renderRightActions should be a boolean, not a function

C. Missing onSwipe callback prop

D. Text component cannot be used directly as a swipe action button

Solution

1. Step 1: Check renderRightActions return type

   Swipe actions should be interactive buttons or touchable components, not plain Text.

2. Step 2: Identify correct component usage

   Using Text alone won't respond to touches; use TouchableOpacity or Button.

3. Final Answer:

   Text component cannot be used directly as a swipe action button -> Option D

4. Quick Check:

   Swipe actions need touchable components [OK]

Hint: Swipe actions must be touchable, not plain Text [OK]

Common Mistakes:

• Using plain Text instead of touchable components
• Thinking renderRightActions is a boolean
• Assuming Swipeable can't wrap Text

5. You want to create a swipeable list where swiping left reveals a 'Delete' button and swiping right reveals an 'Archive' button. Which code snippet correctly implements this behavior?

hard

A. Delete}
renderRightActions={() => Archive}
>
Item

B. }
renderRightActions={() => }
>
Item

C. }
renderRightActions={() => }
>
Item

D. }
rightActions={() => }
>
Item

Solution

1. Step 1: Match swipe directions to actions

   Swiping left means moving finger leftwards, revealing right side actions, so 'Delete' should be on right.

2. Step 2: Assign correct props

   renderRightActions shows buttons on right side (swipe left), renderLeftActions shows buttons on left side (swipe right).

3. Step 3: Check button components

   Buttons are used correctly, not plain Text.

4. Final Answer:

   renderLeftActions shows 'Archive', renderRightActions shows 'Delete' -> Option C

5. Quick Check:

   Left swipe = right actions, right swipe = left actions [OK]

Hint: Left swipe reveals right actions; right swipe reveals left actions [OK]

Common Mistakes:

• Swapping left and right actions
• Using plain Text instead of buttons
• Using wrong prop names like leftActions